[ Test Suite pet | Hossa ]

Positions 41 - 50


[Diagram of position #41]

Test position #41

Black to move


FEN :          1r6/4k3/r2p2p1/2pR1p1p/2P1pP1P/pPK1P1P1/P7/1B6 b - -
Best Move :    Rxb3+ 
Position ID:  "PET041: RR vs RB"

 depth   value    time    nodes pv
    1    +2.35    0.00        2 1... Kf6 
   <1>   +2.35    0.00       45 1... Kf6 
    2    +2.14    0.00       78 1... Kf6 2.d5d2 
   <2>   +2.14    0.00      226 1... Kf6 2.d5d2 
    3    +2.27    0.00      354 1... Kf6 2.d5d2 a6b6 
   <3>   +2.27    0.00      581 1... Kf6 2.d5d2 a6b6 
    4    +2.24    0.00      988 1... Kf6 2.d5d1 a6b6 3.b1c2 
   <4>   +2.24    0.01     2715 1... Kf6 2.d5d1 a6b6 3.b1c2 
    5    +2.24    0.01     3184 1... Kf6 2.d5d1 a6b6 3.b1c2 b8b7 
   <5>   +2.24    0.01     4874 1... Kf6 2.d5d1 a6b6 3.b1c2 b8b7 
    6    +2.27    0.01     6229 1... Kf6 2.d5d1 a6b6 3.b1c2 b8b7 
                                4.c2b1 b7b8 5.b1c2 b8b7 6.c2b1 b7b8 
                                7.b1c2 
   <6>   +2.27    0.03     9010 1... Kf6 2.d5d1 a6b6 3.b1c2 b8b7 
                                4.c2b1 b7b8 5.b1c2 b8b7 6.c2b1 b7b8 
                                7.b1c2 b8b7 8.c2b1 b7b8 9.b1c2 b8b7 
    7    +2.27    0.03    12830 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.c2b1 b8b7 
   <7>   +2.27    0.04    17199 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.c2b1 b8b7 
    8    +2.24    0.06    22045 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.c2b1 b8b7 5.b1c2 b7b8 6.c2b1 b8b7 
                                7.b1c2 b7b8 8.c2b1 
   <8>   +2.24    0.07    33414 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.c2b1 b8b7 5.b1c2 b7b8 6.c2b1 b8b7 
                                7.b1c2 b7b8 8.c2b1 b8b7 9.b1c2 b7b8 
                                10.c2b1 b8b7 
    9    +2.24    0.10    41995 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.d1d2 b8b7 5.c2d1 b7b8 6.d1e2 
   <9>   +2.24    0.12    55958 1... Kf6 2.d5d1 a6c6 3.b1c2 c6b6 
                                4.d1d2 b8b7 5.c2d1 b7b8 6.d1e2 
   10    +2.22    0.25   122022 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d2 
  <10>   +2.22    0.43   232376 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d2 
   11    +2.20    0.60   322383 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d2 b8b7 5.c2d1 Ke6 6.d1e2 b7b8 
                                7.d2d1 Kf6 
  <11>   +2.20    0.89   485653 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d2 b8b7 5.c2d1 Ke6 6.d1e2 b7b8 
                                7.d2d1 Kf6 
   12    +2.20    0.98   535714 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d5 Ke6 5.c2d1 b8d8 6.d1e2 Kf6 
                                7.d5d2 d8b8 8.d2d1 
  <12>   +2.20    1.37   756508 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d5 Ke6 5.c2d1 b8d8 6.d1e2 Kf6 
                                7.d5d2 d8b8 8.d2d1 
   13    +2.20    1.57   873797 1... Kf6 2.b1c2 a6c6 3.d5d1 c6b6 
                                4.d1d2 b8b7 5.c2d1 Ke6 6.d2d5 b7d7 
                                7.d1e2 Kf6 8.d5d1 d7b7 
 7/13    +2.21    2.37  1305969 1... Kd7 2.b1c2 Kc7 3.c2d1 a6a7 
                                4.d5d2 Kc6 5.d1e2 a7d7 6.d2d1 d5 
                                7.c4xd5 d7xd5 8.d1c1 d5d7 9.Kc4 
  <13>   +2.21    2.42  1332533 1... Kd7 2.b1c2 Kc7 3.c2d1 a6a7 
                                4.d5d2 Kc6 5.d1e2 a7d7 6.d2d1 d5 
                                7.c4xd5 d7xd5 8.d1c1 d5d7 9.Kc4 
   14    +2.21    3.34  1833052 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7b7 5.d1e2 b8d8 6.d2d5 d8d7 
                                7.d5d1 d5 8.c4xd5 d7xd5 
  <14>   +2.21    3.60  1976357 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7b7 5.d1e2 b8d8 6.d2d5 d8d7 
                                7.d5d1 d5 8.c4xd5 d7xd5 
   15    +2.21    4.23  2317922 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.d5d2 c7b7 
  <15>   +2.21    4.75  2594070 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.d5d2 c7b7 
   16    +2.25    7.39  3925951 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1c2 d8d7 9.d5d1 d5 
                                10.c4xd5 d7xd5 11.d1c1 
  <16>   +2.25    8.23  4379383 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1c2 d8d7 9.d5d1 d5 
                                10.c4xd5 d7xd5 11.d1c1 
   17    +2.25   10.04  5362204 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1e2 d8d7 9.Kc2 b7b8 
                                10.Kc3 b8d8 11.d5d2 d5 
  <17>   +2.25   13.10  6937616 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1e2 d8d7 9.Kc2 b7b8 
                                10.Kc3 b8d8 11.d5d2 d5 
   18    +2.22   23.54 12212331 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1e2 d8d7 9.Kc2 b7b8 
                                10.Kc3 b8d8 11.e2d1 
  <18>   +2.22   32.68 16815177 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1e2 d8d7 9.Kc2 b7b8 
                                10.Kc3 b8d8 11.e2d1 
   19    +2.22   41.01 21206104 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.Kd2 Kb6 9.d1e2 d8d7 
                                10.Kc3 Kc6 
  <19>   +2.22   54.46 28150954 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.Kd2 Kb6 9.d1e2 d8d7 
                                10.Kc3 Kc6 
  <20>   +2.22    1:00 31132974 1... Kd7 2.b1c2 a6a7 3.c2d1 Kc6 
                                4.d5d2 a7d7 5.d1e2 b8d8 6.d2d5 d7c7 
                                7.e2d1 c7b7 8.d1e2 d8d7 

Computed move :   Kd7
NPS:              518882
no solution found [:-( [27/41]!
[Diagram of position #42]

Test position #42

White to move


FEN :          8/8/5P1k/8/2K5/pr2r3/4R3/2R5 w - -
Best Move :    f7 
Position ID:  "PET042: double rook endgame"

 depth   value    time    nodes pv
    1    +0.46    0.00      147 1.e2h2 Kg6 2.c1f1 
  2/1    +0.86    0.00      149 1.e2a2 
   <1>   +0.86    0.00      222 1.e2a2 
    2    +0.47    0.00      264 1.e2a2 e3f3 
  7/2    +0.51    0.00      681 1.e2xe3 b3xe3 
   <2>   +0.51    0.00      848 1.e2xe3 b3xe3 
    3    +0.87    0.00     1000 1.e2xe3 b3xe3 2.c1g1 
   <3>   +0.87    0.00     2652 1.e2xe3 b3xe3 2.c1g1 
    4    +0.49    0.00     2934 1.e2xe3 b3xe3 2.c1g1 e3f3 
  4/4    +0.54    0.01     8865 1.f7 Kg7 2.e2xe3 b3xe3 3.Kd4 
 11/4    +0.79    0.03    13424 1.e2g2 e3h3 2.c1h1 h3xh1 3.Kxb3 
   <4>   +0.79    0.03    14974 1.e2g2 e3h3 2.c1h1 h3xh1 3.Kxb3 
    5    +0.88    0.04    21091 1.e2g2 e3h3 2.c1g1 b3c3 3.Kd4 h3f3 
   <5>   +0.88    0.06    31814 1.e2g2 e3h3 2.c1g1 b3c3 3.Kd4 h3f3 
    6    +1.01    0.09    48128 1.e2g2 e3h3 2.c1g1 b3f3 3.g2g6 Kh7 
                                4.g6g7 Kh6 5.g1g6 Kh5 
   <6>   +1.01    0.14    75799 1.e2g2 e3h3 2.c1g1 b3f3 3.g2g6 Kh7 
                                4.g6g7 Kh6 5.g1g6 Kh5 
    7    +0.90    0.20   106658 1.e2g2 e3h3 2.c1g1 h3c3 3.Kd4 c3d3 
                                4.Ke5 d3e3 5.Kd6 e3d3 6.Ke6 d3e3 
                                7.Kf5 b3b4 
   <7>   +0.90    0.32   183351 1.e2g2 e3h3 2.c1g1 h3c3 3.Kd4 c3d3 
                                4.Ke5 d3e3 5.Kd6 e3d3 6.Ke6 d3e3 
                                7.Kf5 b3b4 
    8    +0.84    0.62   341722 1.e2g2 e3h3 2.c1g1 b3c3 3.Kd4 c3d3 
                                4.Ke5 d3e3 5.Kd6 e3d3 6.Kc5 d3c3 
                                7.Kd6 h3f3 
   <8>   +0.84    0.89   511087 1.e2g2 e3h3 2.c1g1 b3c3 3.Kd4 c3d3 
                                4.Ke5 d3e3 5.Kd6 e3d3 6.Kc5 d3c3 
                                7.Kd6 h3f3 
    9    +0.69    1.48   851877 1.e2g2 e3h3 2.c1g1 b3c3 3.Kd4 c3d3 
                                4.Kc5 d3c3 5.Kb5 c3b3 6.Kc6 b3c3 
                                7.Kd5 
! 4/9    +1.26    2.34  1443985 1.f7 
!   9    +2.01    2.42  1502999 1.f7 
!   9    +5.01    2.73  1717054 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b8 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.Kxa3 
   <9>   +5.01    2.85  1784996 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b8 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.Kxa3 
   10    +5.01    5.28  3259601 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b7 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.g1e1 Kd4 11.Kxa3 
  <10>   +5.01    6.71  4254592 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b7 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.g1e1 Kd4 11.Kxa3 
   11    +5.03    9.59  6029907 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b7 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.g1e1 Kd4 11.Kxa3 b7b8 12.f3e3 
  <11>   +5.03   18.45 11570669 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 e3g3 5.f1g1 b3c3 6.Kb4 c3b3 
                                7.Ka4 b3b7 8.g2xg3 Kf6 9.g3f3 Ke5 
                                10.g1e1 Kd4 11.Kxa3 b7b8 12.f3e3 
   12    +5.23   29.20 18485225 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 Kh6 5.f1h1 e3h3 6.g2h2 b3c3 
                                7.Kb4 c3b3 8.Ka4 Kg5 9.h2xh3 b3b7 
                                10.Kxa3 Kf6 11.h3b3 b7a7 
  <12>   +5.23   55.50 35194030 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 Kh6 5.f1h1 e3h3 6.g2h2 b3c3 
                                7.Kb4 c3b3 8.Ka4 Kg5 9.h2xh3 b3b7 
                                10.Kxa3 Kf6 11.h3b3 b7a7 
  <13>   +5.23    1:00 38353125 1.f7 Kg7 2.f7f8Q Kxf8 3.c1f1 Kg7 
                                4.e2g2 Kh6 5.f1h1 e3h3 6.g2h2 b3c3 
                                7.Kb4 c3b3 8.Ka4 Kg5 9.h2xh3 b3b7 

Computed move :   f7
NPS:              639218
solution found [28/42], time: 2.34, points: 23, nodes: 1443985!
[Diagram of position #43]

Test position #43

Black to move


FEN :          r5k1/5pp1/1P5p/3R4/2r5/P3P3/2p2PPP/2R3K1 b - -
Best Move :    Rxa3 
Position ID:  "PET043: double rook endgame"

 depth   value    time    nodes pv
    1    -1.53    0.00        2 1... a8xa3 
   <1>   -1.53    0.00       31 1... a8xa3 
    2    -1.72    0.02       69 1... a8xa3 2.b7 
   <2>   -1.72    0.02      282 1... a8xa3 2.b7 
? 2/3    -2.68    0.02     2042 1... f6 2.d5d4 c4c5 
? 3/3    -2.50    0.02     2593 1... c4c3 2.b7 a8b8 3.d5b5 
? 5/3    -2.49    0.02     3167 1... c4c6 2.b7 a8b8 3.d5b5 
   <3>   -2.49    0.03     3847 1... c4c6 2.b7 a8b8 3.d5b5 
    4    -2.49    0.03     5334 1... c4c6 2.b7 a8b8 3.d5b5 f6 
   <4>   -2.49    0.03     7986 1... c4c6 2.b7 a8b8 3.d5b5 f6 
    5    -2.39    0.05    12731 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 c7xb7 6.c1xc2 
   <5>   -2.39    0.08    24219 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 c7xb7 6.c1xc2 
    6    -2.39    0.09    30396 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 
   <6>   -2.39    0.17    68692 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 
    7    -2.39    0.20    84786 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 c7xb7 6.c1xc2 
   <7>   -2.39    0.25   113363 1... c4c6 2.b7 a8b8 3.d5b5 c6c7 
                                4.a4 b8xb7 5.b5xb7 c7xb7 6.c1xc2 
    8    -2.04    0.37   186549 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b8xb7 5.c7xc2 b6b1 6.a4 
   <8>   -2.04    0.45   221275 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b8xb7 5.c7xc2 b6b1 6.a4 
    9    -2.14    0.64   334351 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b6xb7 5.c7xc2 b7b1 6.Kf1 b1b7 
   <9>   -2.14    0.72   376815 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b6xb7 5.c7xc2 b7b1 6.Kf1 b1b7 
   10    -2.02    1.11   602109 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b6xb7 5.c7xc2 b7b3 6.a4 b3a3 
                                7.c2c4 Kh7 
  <10>   -2.02    1.55   850372 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b6xb7 5.c7xc2 b7b3 6.a4 b3a3 
                                7.c2c4 Kh7 
   11    -1.99    2.42  1361022 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b8xb7 5.c7xc2 b6b3 6.c2c8 Kh7 
                                7.a4 b3a3 8.c8c4 b7d7 
  <11>   -1.99    2.73  1542610 1... c4c6 2.b7 a8b8 3.d5d7 c6b6 
                                4.d7c7 b8xb7 5.c7xc2 b6b3 6.c2c8 Kh7 
                                7.a4 b3a3 8.c8c4 b7d7 
   12    -2.08    4.94  2861400 1... c4c6 2.b7 a8b8 3.d5d7 Kf8 
                                4.Kf1 Ke8 5.d7d2 b8xb7 6.c1xc2 c6xc2 
                                7.d2xc2 b7b1 8.Ke2 b1a1 9.c2c8 Ke7 
                                10.c8c3 
  <12>   -2.08    5.55  3209908 1... c4c6 2.b7 a8b8 3.d5d7 Kf8 
                                4.Kf1 Ke8 5.d7d2 b8xb7 6.c1xc2 c6xc2 
                                7.d2xc2 b7b1 8.Ke2 b1a1 9.c2c8 Ke7 
                                10.c8c3 
   13    -2.19   11.02  6471296 1... c4c6 2.b7 a8b8 3.d5d7 Kf8 
                                4.Kf1 Ke8 5.d7d2 b8xb7 6.c1xc2 c6xc2 
                                7.d2xc2 b7b1 8.Ke2 b1a1 9.c2c8 Ke7 
                                10.c8c3 Kf6 11.Kf3 
 4/13    -2.13   25.06 14107802 1... Kh7 2.b7 a8b8 3.d5d7 Kg6 
                                4.Kf1 Kf6 5.a4 Ke6 6.d7d4 c4c7 
                                7.d4e4 Kf5 8.e4b4 c7xb7 9.b4xb7 b8xb7 
                                10.c1xc2 
  <13>   -2.13   25.77 14504616 1... Kh7 2.b7 a8b8 3.d5d7 Kg6 
                                4.Kf1 Kf6 5.a4 Ke6 6.d7d4 c4c7 
                                7.d4e4 Kf5 8.e4b4 c7xb7 9.b4xb7 b8xb7 
                                10.c1xc2 
   14    -2.18   39.87 22373661 1... Kh7 2.b7 a8b8 3.d5d7 Kg6 
                                4.Kf1 Kf6 5.Ke2 Ke6 6.d7d2 b8xb7 
                                7.c1xc2 c4a4 8.c2c6 Ke5 9.c6c5 Kf6 
                                10.d2a2 b7b3 11.c5c6 Ke5 
 7/14    -2.08   55.09 31443777 1... a8b8 2.d5d6 Kf8 3.Kf1 Ke7 
                                4.d6d4 c4c6 5.d4b4 c6xb6 6.b4xb6 b8xb6 
                                7.c1xc2 b6b1 8.Ke2 b1h1 9.h3 h1a1 
                                10.c2c3 
  <14>   -2.08    1:00 34238081 1... a8b8 2.d5d6 Kf8 3.Kf1 Ke7 
                                4.d6d4 c4c6 5.d4b4 c6xb6 6.b4xb6 b8xb6 
                                7.c1xc2 b6b1 8.Ke2 b1h1 9.h3 h1a1 
                                10.c2c3 

Computed move :   a8b8
NPS:              570444
no solution found [:-( [28/43]!
[Diagram of position #44]

Test position #44

White to move


FEN :          1r6/Rp2rp2/1Pp2kp1/N1Pp3p/3Pp1nP/4P1P1/R4P2/6K1 w - -
Best Move :    Nxb7 
Position ID:  "PET044: RRN vs RRN"

 depth   value    time    nodes pv
    1    +0.22    0.00        2 1.a5b3 
   <1>   +0.22    0.02       30 1.a5b3 
    2    +0.15    0.02       76 1.a5b3 e7e8 
   <2>   +0.15    0.02      144 1.a5b3 e7e8 
    3    +0.27    0.02      321 1.a5b3 e7e8 2.a7a4 
   <3>   +0.27    0.02      514 1.a5b3 e7e8 2.a7a4 
    4    +0.22    0.02      947 1.a5b3 e7e8 2.a7a4 Ke6 
   <4>   +0.22    0.02     1712 1.a5b3 e7e8 2.a7a4 Ke6 
    5    +0.31    0.02     3294 1.a5b3 e7e8 2.a7a4 Ke6 3.Kg2 
   <5>   +0.31    0.03     4359 1.a5b3 e7e8 2.a7a4 Ke6 3.Kg2 
    6    +0.27    0.03     6897 1.a5b3 e7e8 2.a7a4 Ke6 3.Kg2 f5 
                                4.a2a1 
   <6>   +0.27    0.03     9849 1.a5b3 e7e8 2.a7a4 Ke6 3.Kg2 f5 
                                4.a2a1 
    7    +0.27    0.06    19254 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 
   <7>   +0.27    0.08    24591 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 
    8    +0.27    0.09    36306 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.f4 
   <8>   +0.27    0.11    41529 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.f4 
    9    +0.26    0.16    67386 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 
   <9>   +0.26    0.17    79464 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 
   10    +0.27    0.42   209442 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 6.d2b3 Kf5 
  <10>   +0.27    0.45   222016 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 6.d2b3 Kf5 
   11    +0.26    0.59   299097 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 6.Kh3 Kf5 
                                7.Kg2 
  <11>   +0.26    0.72   364932 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8f8 5.b3d2 b8c8 6.Kh3 Kf5 
                                7.Kg2 
   12    +0.26    0.97   500559 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8g8 5.b3c1 g5 6.h4xg5 g8xg5 
                                7.c1e2 b8g8 
  <12>   +0.26    1.13   591423 1.a5b3 e7e8 2.a2a1 Ke6 3.a7a2 g4f6 
                                4.Kg2 e8g8 5.b3c1 g5 6.h4xg5 g8xg5 
                                7.c1e2 b8g8 
   13    +0.15    2.72  1423144 1.a5b3 Ke6 2.Kg2 f6 3.Kh3 g5 
                                4.b3a5 g5xh4 5.Kxh4 g4h2 6.a5b3 h2f3 
                                7.Kh3 b8g8 8.a7a4 
  <13>   +0.15    3.72  1969692 1.a5b3 Ke6 2.Kg2 f6 3.Kh3 g5 
                                4.b3a5 g5xh4 5.Kxh4 g4h2 6.a5b3 h2f3 
                                7.Kh3 b8g8 8.a7a4 
   14    +0.13    6.56  3482611 1.a5b3 Ke6 2.Kg2 f6 3.a7a8 e7e8 
                                4.a8xb8 e8xb8 5.a2a7 Kd7 6.a7a4 b8h8 
                                7.a4a3 f5 8.a3a2 Ke6 
  <14>   +0.13    7.95  4244430 1.a5b3 Ke6 2.Kg2 f6 3.a7a8 e7e8 
                                4.a8xb8 e8xb8 5.a2a7 Kd7 6.a7a4 b8h8 
                                7.a4a3 f5 8.a3a2 Ke6 
   15    +0.14    9.33  5023183 1.a5b3 Ke6 2.Kg2 f6 3.a7a8 e7e8 
                                4.a8xb8 e8xb8 5.a2a7 Kd7 6.a7a1 g5 
                                7.a1h1 b8h8 8.b3a5 Kc8 9.h1a1 g5xh4 
                                10.g3xh4 
  <15>   +0.14   10.58  5736128 1.a5b3 Ke6 2.Kg2 f6 3.a7a8 e7e8 
                                4.a8xb8 e8xb8 5.a2a7 Kd7 6.a7a1 g5 
                                7.a1h1 b8h8 8.b3a5 Kc8 9.h1a1 g5xh4 
                                10.g3xh4 
   16    +0.11   19.19 10453514 1.a5b3 Ke6 2.Kg2 f6 3.a7a8 e7e8 
                                4.a8a4 g5 5.Kh3 e8d8 6.b3c1 Ke7 
                                7.a4a3 Ke6 8.a3a7 
 3/16    +0.14   26.63 14356314 1.Kg2 Ke6 2.a2a1 f6 3.a1h1 e7f7 
                                4.a5b3 g5 5.a7a2 b8f8 6.b3c1 f7h7 
                                7.c1e2 g4h6 8.h1a1 h6f5 9.Kh3 g5xh4 
  <16>   +0.14   29.53 15888479 1.Kg2 Ke6 2.a2a1 f6 3.a1h1 e7f7 
                                4.a5b3 g5 5.a7a2 b8f8 6.b3c1 f7h7 
                                7.c1e2 g4h6 8.h1a1 h6f5 9.Kh3 g5xh4 
   17    +0.20   34.31 18519442 1.Kg2 Ke6 2.a2a1 f6 3.a5xb7 b8xb7 
                                4.a7xb7 e7xb7 5.a1a7 b7b8 6.a7c7 Kf5 
                                7.c7xc6 g4h6 8.c6d6 h6f7 9.d6d7 Ke6 
                                10.d7a7 b8c8 11.a7a2 
  <17>   +0.20   39.59 21377180 1.Kg2 Ke6 2.a2a1 f6 3.a5xb7 b8xb7 
                                4.a7xb7 e7xb7 5.a1a7 b7b8 6.a7c7 Kf5 
                                7.c7xc6 g4h6 8.c6d6 h6f7 9.d6d7 Ke6 
                                10.d7a7 b8c8 11.a7a2 
   18    +0.20   44.28 24045760 1.Kg2 Ke6 2.a2a1 f6 3.a5xb7 b8xb7 
                                4.a7xb7 e7xb7 5.a1a7 b7b8 6.a7c7 Kf5 
                                7.c7xc6 g4h6 8.c6d6 h6f7 9.d6d7 Ke6 
                                10.d7a7 f5 11.Kh3 b8c8 12.Kg2 
  <18>   +0.20   57.47 31002959 1.Kg2 Ke6 2.a2a1 f6 3.a5xb7 b8xb7 
                                4.a7xb7 e7xb7 5.a1a7 b7b8 6.a7c7 Kf5 
                                7.c7xc6 g4h6 8.c6d6 h6f7 9.d6d7 Ke6 
                                10.d7a7 f5 11.Kh3 b8c8 12.Kg2 
  <19>   +0.20    1:00 32360959 1.Kg2 Ke6 2.a2a1 f6 3.a5xb7 b8xb7 

Computed move :   Kg2
NPS:              539349
no solution found [:-( [28/44]!
[Diagram of position #45]

Test position #45

White to move


FEN :          5k2/4p3/3p2Q1/3Pq1pP/5pP1/2P4K/8/8 w - -
Best Move :    Qf5+ 
Position ID:  "PET045: Queen endgame"

 depth   value    time    nodes pv
    1    -1.43    0.00       17 1.g6h7 e5xd5 
  3/1    +0.06    0.00       27 1.c4 
  5/1    +0.18    0.00       32 1.g6d3 
   <1>   +0.18    0.01      101 1.g6d3 
    2    -0.12    0.01      141 1.g6d3 e6 
   <2>   -0.12    0.01      485 1.g6d3 e6 
    3    -0.18    0.01      594 1.g6d3 e6 2.d5xe6 e5xe6 
  2/3    -0.17    0.01     1401 1.g6h6 Ke8 2.h6g6 Kd7 3.g6d3 e6 
   <3>   -0.17    0.01     1789 1.g6h6 Ke8 2.h6g6 Kd7 3.g6d3 e6 
    4    -0.28    0.03     4321 1.g6h6 e5g7 2.h6xg7 Kxg7 3.Kg2 Kf7 
                                4.Kf3 e5 
  2/4    +0.00    0.03     5001 1.g6d3 Kg7 2.d3g6 Kf8 3.g6h6 e5g7 
                                4.h6xg7 Kxg7 5.Kg2 Kf7 6.Kf3 e5 
   <4>   +0.00    0.03     5707 1.g6d3 Kg7 2.d3g6 Kf8 3.g6h6 e5g7 
                                4.h6xg7 Kxg7 5.Kg2 Kf7 6.Kf3 e5 
    5    -0.04    0.04    10743 1.g6d3 e5e3 2.d3xe3 f4xe3 3.Kg3 e2 
                                4.Kf2 
  2/5    -0.02    0.06    14703 1.g6h6 e5g7 2.h6xg7 Kxg7 3.Kg2 Kh7 
                                4.Kf3 Kg7 5.Ke4 
   <5>   -0.02    0.06    15708 1.g6h6 e5g7 2.h6xg7 Kxg7 3.Kg2 Kh7 
                                4.Kf3 Kg7 5.Ke4 
    6    -0.08    0.09    29528 1.g6h6 Ke8 2.h6g6 Kd8 3.g6d3 e6 
                                4.d5xe6 e5xe6 5.d3f3 e6a2 
  2/6    -0.03    0.10    34362 1.g6d3 e6 2.d5xe6 e5xe6 3.d3f3 e6e3 
                                4.f3xe3 f4xe3 
   <6>   -0.03    0.10    38603 1.g6d3 e6 2.d5xe6 e5xe6 3.d3f3 e6e3 
                                4.f3xe3 f4xe3 
    7    -0.18    0.14    48855 1.g6d3 e6 2.d5xe6 e5xe6 3.d3f3 Kg7 
                                4.f3b7 Kh6 5.b7f3 
  2/7    +0.00    0.18    75031 1.g6h6 Ke8 2.h6g6 Kf8 3.g6d3 e6 
                                4.d5xe6 e5xe6 5.d3f3 d5 6.Kg2 
   <7>   +0.00    0.20    85243 1.g6h6 Ke8 2.h6g6 Kf8 3.g6d3 e6 
                                4.d5xe6 e5xe6 5.d3f3 d5 6.Kg2 
    8    +0.00    0.31   141542 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
   <8>   +0.00    0.34   159722 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 
    9    +0.00    0.48   240445 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
   <9>   +0.00    1.12   597770 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 
   10    +0.00    1.62   891011 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
  <10>   +0.00    3.06  1736347 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 
   11    +0.00    5.10  2896325 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
  <11>   +0.00   10.12  5755881 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 
   12    +0.00   14.25  8167479 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
  <12>   +0.00   23.48 13666692 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 
   13    +0.00   36.59 21177019 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 
  <13>   +0.00    1:00 34616780 1.g6h6 Ke8 2.h6g6 Kf8 3.g6h6 Ke8 
                                4.h6g6 Kf8 5.g6h6 Ke8 6.h6g6 Kf8 
                                7.g6h6 Ke8 

Computed move :   g6h6
NPS:              576850
no solution found [:-( [28/45]!
[Diagram of position #46]

Test position #46

White to move


FEN :          8/8/1P1k2p1/8/5P1p/4Qb2/1q4PK/8 w - -
Best Move :    Qe5+ 
Position ID:  "PET046: Q+B vs Q"

 depth   value    time    nodes pv
    1    -0.09    0.00        3 1.e3xf3 b2xb6 
 12/1    +0.03    0.00      110 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 
   <1>   +0.03    0.00      163 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 
    2    +0.03    0.00      267 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 
   <2>   +0.03    0.00      597 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 
    3    +0.27    0.00      894 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.Kh3 
   <3>   +0.27    0.02     1711 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.Kh3 
    4    +0.24    0.02     2512 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.Kh3 g5 
   <4>   +0.24    0.03     4826 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.Kh3 g5 
    5    +0.00    0.03     6965 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.Kh3 g5 5.f4 g5xf4 6.Kxh4 
  3/5    +0.56    0.05    12756 1.e3xf3 b2xb6 2.Kh3 b6b1 3.f3a3 Ke6 
                                4.Kxh4 
   <5>   +0.56    0.05    14930 1.e3xf3 b2xb6 2.Kh3 b6b1 3.f3a3 Ke6 
                                4.Kxh4 
    6    +0.94    0.08    26709 1.e3xf3 b2xb6 2.Kh3 b6c7 3.Kxh4 c7e7 
                                4.Kg4 e7e1 
   <6>   +0.94    0.11    39956 1.e3xf3 b2xb6 2.Kh3 b6c7 3.Kxh4 c7e7 
                                4.Kg4 e7e1 
    7    +0.94    0.14    64491 1.e3xf3 b2xb6 2.Kh3 b6c7 3.Kxh4 c7e7 
                                4.Kg4 e7e6 5.Kg3 e6e1 6.Kg4 
! 4/7    +1.36    0.22   105162 1.e3e5 
!   7    +1.98    0.22   113995 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.f4 Kc6 5.Kh3 Kb7 6.Kxh4 Kc6 
   <7>   +1.98    0.24   120053 1.e3e5 b2xe5 2.f4xe5 Kxe5 3.g2xf3 Kd6 
                                4.f4 Kc6 5.Kh3 Kb7 6.Kxh4 Kc6 
!   8    +2.40    0.27   133699 1.e3e5 
!   8    +3.15    0.28   151820 1.e3e5 
!   8    +3.16    0.30   171202 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 Kd7 6.Kxh4 Ke7 
                                7.Kg5 Kf7 8.e6 Kg7 
   <8>   +3.16    0.39   220993 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 Kd7 6.Kxh4 Ke7 
                                7.Kg5 Kf7 8.e6 Kg7 
!   9    +3.58    0.42   243855 1.e3e5 
!   9    +3.87    0.47   287610 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 Kd7 6.Kxh4 Ke7 
                                7.Kg5 Kf7 8.e6 Kf8 9.Kxg6 Ke7 
   <9>   +3.87    0.91   557541 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 Kd7 6.Kxh4 Ke7 
                                7.Kg5 Kf7 8.e6 Kf8 9.Kxg6 Ke7 
!  10    +4.29    0.97   602094 1.e3e5 
!  10    +4.20    1.03   654179 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 g5 6.f4xg5 Kd7 
                                7.Kxh4 Ke6 8.Kg4 Kf7 9.Kf5 Ke7 
  <10>   +4.20    3.02  1932739 1.e3e5 b2xe5 2.f4xe5 Kc6 3.g2xf3 Kxb6 
                                4.f4 Kc6 5.Kh3 g5 6.f4xg5 Kd7 
                                7.Kxh4 Ke6 8.Kg4 Kf7 9.Kf5 Ke7 
!  11    +4.62    3.16  2033488 1.e3e5 
!  11    +5.37    3.24  2113690 1.e3e5 
!  11    +8.57    3.41  2242731 1.e3e5 
  <11>   +8.57    3.41  2242731 1.e3e5 

Computed move :   e3e5
NPS:              657692
solution found [29/46], time: 0.22, points: 25, nodes: 105162!
[Diagram of position #47]

Test position #47

Black to move


FEN :          8/p4k2/1p1p1qp1/1P1P4/P5P1/7P/4Q1K1/2b5 b - -
Avoid Move :    Qb2 
Position ID:  "PET047: Q+B vs Q"

 depth   value    time    nodes pv
    1    +3.16    0.02        2 1... f6a1 
 24/1    +3.24    0.02       49 1... f6b2 
   <1>   +3.24    0.02       89 1... f6b2 
    2    +3.24    0.02      128 1... f6b2 2.Kf3 b2xe2 3.Kxe2 
   <2>   +3.24    0.02      382 1... f6b2 2.Kf3 b2xe2 3.Kxe2 
    3    +3.32    0.02      609 1... f6b2 2.e2xb2 c1xb2 
   <3>   +3.32    0.02     1063 1... f6b2 2.e2xb2 c1xb2 
    4    +3.29    0.02     1559 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
   <4>   +3.29    0.03     3331 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
    5    +3.20    0.03     3729 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 
   <5>   +3.20    0.05    10030 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 
    6    +3.26    0.07    19496 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 b2c3 
   <6>   +3.26    0.10    31058 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 b2c3 
    7    +3.29    0.10    35400 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 g5 5.Kf3 
   <7>   +3.29    0.16    67037 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Ke4 g5 5.Kf3 
    8    +3.35    0.22   100202 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Kf4 g5 5.Ke4 b2c3 6.Kf3 
   <8>   +3.35    0.30   137067 1... f6b2 2.e2xb2 c1xb2 3.Kf3 Kf6 
                                4.Kf4 g5 5.Ke4 b2c3 6.Kf3 
    9    +3.27    0.33   162530 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2e1 6.Kg4 
   <9>   +3.27    0.77   398507 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2e1 6.Kg4 
   10    +3.32    0.86   455079 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2e1 6.Kg4 e1f2 
                                7.h5 
  <10>   +3.32    1.35   730196 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2e1 6.Kg4 e1f2 
                                7.h5 
   11    +3.24    1.49   818414 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2b4 6.Ke2 b4c3 
                                7.Kd3 c3e5 
  <11>   +3.24    5.44  2999620 1... f6b2 2.e2xb2 c1xb2 3.g5 b2c1 
                                4.h4 c1d2 5.Kf3 d2b4 6.Ke2 b4c3 
                                7.Kd3 c3e5 
   12    +3.21    6.21  3445305 1... f6b2 2.e2xb2 c1xb2 3.g5 Kg7 
                                4.Kf3 b2c3 5.Kf4 Kf7 6.Kf3 c3h8 
                                7.Ke4 h8c3 8.h4 
 4/12    +3.34   28.30 15422286 1... Kg7 2.e2c4 c1e3 3.c4c7 Kh6 
                                4.c7c2 f6e5 5.Kf3 e3g5 6.c2a2 e5f4 
                                7.Kg2 f4e4 8.Kf2 e4e3 9.Kg2 e3e1 
  <12>   +3.34   28.97 15821262 1... Kg7 2.e2c4 c1e3 3.c4c7 Kh6 
                                4.c7c2 f6e5 5.Kf3 e3g5 6.c2a2 e5f4 
                                7.Kg2 f4e4 8.Kf2 e4e3 9.Kg2 e3e1 
   13    +3.64   44.24 24162641 1... Kg7 2.e2c4 c1e3 3.c4c2 Kh6 
                                4.c2e2 f6d4 5.e2f3 d4d2 6.Kf1 e3f4 
                                7.f3b3 f4e5 8.Kg1 Kg7 
  <13>   +3.64   45.10 24696805 1... Kg7 2.e2c4 c1e3 3.c4c2 Kh6 
                                4.c2e2 f6d4 5.e2f3 d4d2 6.Kf1 e3f4 
                                7.f3b3 f4e5 8.Kg1 Kg7 
  <14>   +3.64    1:00 32879089 1... Kg7 2.e2c4 c1e3 3.c4c2 f6f4 
                                4.c2e2 Kf6 5.e2f3 Ke5 6.h4 f4xf3 
                                7.Kxf3 e3h6 8.h5 g6xh5 9.g4xh5 Kxd5 
                                10.Kg4 

Computed move :   Kg7
NPS:              547802
solution found [30/47], time: 28.30, points: 14, nodes: 15821262!
[Diagram of position #48]

Test position #48

White to move


FEN :          6qk/1p4pn/8/3p4/2P5/p3P1P1/P1Q3K1/1B6 w - -
Avoid Move :    Qxh7+ 
Position ID:  "PET048: Q+B vs Q+N"

 depth   value    time    nodes pv
    1    +0.09    0.00       10 1.c4xd5 g8xd5 2.e4 
 23/1    +2.21    0.00       66 1.c2xh7 g8xh7 2.b1xh7 d5xc4 
   <1>   +2.21    0.00       68 1.c2xh7 g8xh7 2.b1xh7 d5xc4 
    2    +2.49    0.00      217 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7g6 
   <2>   +2.49    0.00      348 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7g6 
    3    +2.43    0.02      843 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 b5 
                                4.Kf3 
   <3>   +2.43    0.02     1196 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 b5 
                                4.Kf3 
    4    +2.27    0.02     2193 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7c2 Kg8 
                                4.c2g6 
   <4>   +2.27    0.03     3461 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7c2 Kg8 
                                4.c2g6 
    5    +2.43    0.03     7263 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 b6 
                                4.Kf3 b5 
   <5>   +2.43    0.05     9589 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 b6 
                                4.Kf3 b5 
    6    +2.23    0.07    17822 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.Kf3 Kg8 5.Kf2 b6 6.e4c2 
   <6>   +2.23    0.08    30945 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.Kf3 Kg8 5.Kf2 b6 6.e4c2 
    7    +2.13    0.11    51768 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4c2 Kg8 5.e4 b5 6.e5 b4 
   <7>   +2.13    0.19    86993 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4c2 Kg8 5.e4 b5 6.e5 b4 
    8    +2.06    0.25   134573 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4g6 Kg8 5.Kf3 b5 6.g6c2 b4 
                                7.e4 
   <8>   +2.06    0.35   182371 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4g6 Kg8 5.Kf3 b5 6.g6c2 b4 
                                7.e4 
    9    +2.16    0.50   291336 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4g6 Kg8 5.Kf3 b5 6.g6c2 b4 
                                7.e4 Kf7 8.e5 
   <9>   +2.16    0.63   364056 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7e4 c3 
                                4.e4g6 Kg8 5.Kf3 b5 6.g6c2 b4 
                                7.e4 Kf7 8.e5 
   10    +2.26    1.35   858341 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7b1 Kg8 
                                4.Kf3 b5 5.Ke4 Kf7 6.Kd5 g6 
                                7.Kc5 Kf6 8.Kxb5 c3 
  <10>   +2.26    1.66  1044304 1.c2xh7 g8xh7 2.b1xh7 d5xc4 3.h7b1 Kg8 
                                4.Kf3 b5 5.Ke4 Kf7 6.Kd5 g6 
                                7.Kc5 Kf6 8.Kxb5 c3 
?  11    -0.53   14.22  8550213 1.c2xh7 g8xh7 2.b1xh7 Kxh7 3.c4xd5 Kg6 
                                4.d6 Kf7 5.g4 b5 6.Kf1 b4 
                                7.Ke1 b3 8.d7 b3xa2 9.d7d8Q a2a1Q 
                                10.Ke2 a1c3 
?2/11    +0.51   31.99 18117217 1.c4xd5 g8xd5 2.e4 d5d7 3.c2d3 h7f6 
                                4.e5 d7c6 5.d3f3 c6b5 6.e5xf6 b5xb1 
                                7.f6xg7 Kxg7 8.f3xa3 b1c2 9.Kf3 c2d2 
  <11>   +0.51   33.11 18759555 1.c4xd5 g8xd5 2.e4 d5d7 3.c2d3 h7f6 
                                4.e5 d7c6 5.d3f3 c6b5 6.e5xf6 b5xb1 
                                7.f6xg7 Kxg7 8.f3xa3 b1c2 9.Kf3 c2d2 
   12    +0.63   46.25 26112445 1.c4xd5 g8xd5 2.e4 d5d8 3.c2d3 d8a8 
                                4.e5 h7g5 5.d3d5 a8c8 6.b1g6 b6 
                                7.Kf2 g5e6 8.Ke3 
  <12>   +0.63   47.83 27120512 1.c4xd5 g8xd5 2.e4 d5d8 3.c2d3 d8a8 
                                4.e5 h7g5 5.d3d5 a8c8 6.b1g6 b6 
                                7.Kf2 g5e6 8.Ke3 
  <13>   +0.63    1:00 33677811 1.c4xd5 g8xd5 2.e4 d5d8 3.c2d3 d8xd3 
                                4.b1xd3 h7g5 5.e5 Kg8 6.d3g6 b6 
                                7.g4 g5e6 8.Kf3 Kf8 9.Ke4 

Computed move :   c4xd5
NPS:              561296
solution found [31/48], time: 31.99, points: 12, nodes: 18759555!
[Diagram of position #49]

Test position #49

White to move


FEN :          1Q6/Nn3pbp/2N2p2/1Pqk1P1P/8/8/6P1/7K w - -
Avoid Move :    Qxb7 
Position ID:  "PET049: QNN vs QBN"

 depth   value    time    nodes pv
    1    +5.82    0.00        2 1.b8xb7 
   <1>   +5.82    0.00      139 1.b8xb7 
    2    +5.58    0.00      217 1.b8xb7 c5c1 2.Kh2 
   <2>   +5.58    0.01      572 1.b8xb7 c5c1 2.Kh2 
    3    +5.65    0.01     1181 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 
   <3>   +5.65    0.01     2095 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 
?   4    +4.66    0.03     8815 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd2 e4xg2 
                                7.Kc3 
   <4>   +4.66    0.06    16712 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd2 e4xg2 
                                7.Kc3 
    5    +4.66    0.06    19999 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd2 e4xg2 
   <5>   +4.66    0.11    39512 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd2 e4xg2 
    6    +4.66    0.14    51069 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd1 e4g4 
                                7.Kd2 g4xg2 
   <6>   +4.66    0.25   102164 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1f4 5.Ke2 f4e4 6.Kd1 e4g4 
                                7.Kd2 g4xg2 
    7    +4.52    0.33   140283 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1d2 5.Kf3 d2d3 6.Kg4 d3e4 
                                7.Kh3 e4xf5 8.g4 f5f3 9.Kh4 
   <7>   +4.52    0.62   289663 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4c1 
                                4.Kf2 c1d2 5.Kf3 d2d3 6.Kg4 d3e4 
                                7.Kh3 e4xf5 8.g4 f5f3 9.Kh4 
    8    +4.17    0.98   464745 1.b8xb7 c5c1 2.Kh2 c1f4 3.Kg1 f4e3 
                                4.Kf1 e3d3 5.Kf2 d3xf5 6.Kg1 f5xh5 
                                7.b7d7 Ke4 8.d7d4 Kf5 9.d4d5 Kg4 
                                10.d5xh5 Kxh5 
  9/8    +4.22    2.45  1215676 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg1 b7d6 5.g4 h5g5 6.g7xg5 f6xg5 
                                7.f6 
   <8>   +4.22    2.61  1292854 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg1 b7d6 5.g4 h5g5 6.g7xg5 f6xg5 
                                7.f6 
    9    +4.24    3.56  1786704 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.g7g4 d6e4 6.Kf4 h5g5 
                                7.g4xg5 f6xg5 8.Kf3 e4d2 9.Ke3 d2c4 
                                10.Kd3 
   <9>   +4.24    6.03  3127810 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.g7g4 d6e4 6.Kf4 h5g5 
                                7.g4xg5 f6xg5 8.Kf3 e4d2 9.Ke3 d2c4 
                                10.Kd3 
   10    +4.31    7.84  4091548 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.g7g4 d6e4 6.Kf4 h5g5 
                                7.g4xg5 f6xg5 8.Kf3 e4d6 9.Kg4 Ke4 
                                10.Kxg5 d6xf5 
  <10>   +4.31   16.12  8641545 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.g7g4 d6e4 6.Kf4 h5g5 
                                7.g4xg5 f6xg5 8.Kf3 e4d6 9.Kg4 Ke4 
                                10.Kxg5 d6xf5 
   11    +4.10   24.93 13182215 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.c6e7 Kc5 6.g7f8 h5d1 
                                7.Kh2 d1h5 8.Kg1 h5d1 9.Kf2 
  <11>   +4.10    1:00 32180548 1.b8g3 c5c1 2.Kh2 c1d1 3.g3xg7 d1xh5 
                                4.Kg3 b7d6 5.c6e7 Kc5 6.g7f8 h5d1 
                                7.Kh2 d1h5 8.Kg1 h5d1 9.Kf2 

Computed move :   b8g3
NPS:              536253
solution found [32/49], time: 2.45, points: 23, nodes: 1292854!
[Diagram of position #50]

Test position #50

White to move


FEN :          7k/7p/1p4p1/n2p4/1K1p3R/2NB4/3Q1P2/q1r5 w - -
Best Move :    Rxh7+ 
Position ID:  "PET050: QNBR vs QNR"

 depth   value    time    nodes pv
    1    -0.46    0.00        2 1.c3xd5 
   <1>   -0.46    0.00       82 1.c3xd5 
?   2    -1.80    0.00     1112 1.c3xd5 a5c6 2.Kb5 
   <2>   -1.80    0.00     1484 1.c3xd5 a5c6 2.Kb5 
!   3    -1.38    0.00     2351 1.c3xd5 
!   3    -1.17    0.01     3444 1.c3xd5 a5c6 2.Kb3 c1d1 3.d2c2 
   <3>   -1.17    0.01     5052 1.c3xd5 a5c6 2.Kb3 c1d1 3.d2c2 
? 2/4    -3.74    0.08    36252 1.c3a4 a5c4 2.d2h6 c1b1 3.d3xb1 a1xb1 
                                4.a4b2 b1xb2 5.Ka4 
   <4>   -3.74    0.11    50432 1.c3a4 a5c4 2.d2h6 c1b1 3.d3xb1 a1xb1 
                                4.a4b2 b1xb2 5.Ka4 
?   5    -4.88    0.28   149317 1.c3a4 a5c4 2.d2e2 a1a3 3.Kb5 a3b3 
                                4.Kc6 b3xa4 5.Kxd5 a4d7 6.Ke4 
   <5>   -4.88    0.29   149358 1.c3a4 a5c4 2.d2e2 a1a3 3.Kb5 a3b3 
                                4.Kc6 b3xa4 5.Kxd5 a4d7 6.Ke4 
    6    -5.18    0.33   178063 1.c3a4 a5c4 2.d2xc1 a1xc1 3.h4xd4 c1e1 
                                4.a4c3 e1xf2 5.d4xd5 
! 6/6    -4.46    0.48   278173 1.d3xg6 
!   6    -3.71    0.53   310059 1.d3xg6 
!   6    -3.60    0.61   365545 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd6 c3c6 5.Kxc6 a5xd2 6.h4xh7 Kg8 
                                7.h7b7 d2xf2 8.Kxd5 
   <6>   -3.60    0.72   428106 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd6 c3c6 5.Kxc6 a5xd2 6.h4xh7 Kg8 
                                7.h7b7 d2xf2 8.Kxd5 
    7    -3.61    1.01   649667 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.g6d3 
   <7>   -3.61    1.45   941547 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.g6d3 
    8    -3.69    1.83  1264031 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2g3 
   <8>   -3.69    3.70  2494036 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2g3 
    9    -3.63    5.22  3703938 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2e3 9.h7d7 
   <9>   -3.63   13.50  8680161 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2e3 9.h7d7 
   10    -3.70   19.11 13176514 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2e3 9.g6f5 e3f3 
                                10.f5g6 
  <10>   -3.70   32.61 20930850 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.Kxb6 d2xf2 8.Kc5 f2e3 9.g6f5 e3f3 
                                10.f5g6 
   11    -3.67   54.34 38454824 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.h7d7 d2xf2 8.g6f7 Kh8 9.Kxb6 d3 
                                10.Kc6 d4 11.Kc5 
  <11>   -3.67    1:00 41559969 1.d3xg6 a5c6 2.Kb5 a1a5 3.Kxc6 c1xc3 
                                4.Kd7 c3c7 5.Kxc7 a5xd2 6.h4xh7 Kg8 
                                7.h7d7 d2xf2 8.g6f7 Kh8 9.Kxb6 d3 
                                10.Kc6 d4 11.Kc5 

Computed move :   d3xg6
NPS:              692666
no solution found [:-( [32/50]!
© Steffen A. Jakob