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tromp / ChessPositionRanking

Software suite for ranking chess positions and accurately estimating the number of legal chess positions
MIT License
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2q1n1RK/3N3R/1P1qNR1q/2QBnB2/2b3r1/1rQ2QB1/kQ2q2r/3R2bQ b - - 0 1 #873

Closed tromp closed 3 years ago

tromp commented 3 years ago

2q1n1RK/3N3R/1P1qNR1q/2QBnB2/2b3r1/1rQ2QB1/kQ2q2r/3R2bQ b - - 0 1

img

Single Check wx 0 wp 1 wpr 7 wpx 0 maxuwp 1 minopp 0 bx 4 bp 0 bpr 4 bpx 4 maxubp 0 minopp 0

cetsai commented 3 years ago

Proof game:

  1. h4 g5 2. hxg5 h5 3. g6 Nh6 4. g7 h4 5. g8=R h3 6. g4 h2 7. Nf3 Nf5 8. Rg1 h1=R 9. Rg2 e6 10. g5 Ke7 11. g6 Bh6 12. g7 Bg5 13. Rf8 Bf6 14. g8=R Bh4 15. e3 Kd6 16. R8g7 Ke7 17. Rh7 Kd6 18. Rh6 Rh7 19. Rf6 Rh5 20. Rg7 Rg5 21. Rh7 Rg4 22. Rg8 Rg3 23. Ke2 Rh2 24. Kd3 Ne7 25. Ke4 Rgg2 26. Kf4 Rg1 27. Rg2 Rhh1 28. Kg4 Rh2 29. Kh5 Rhh1 30. Kh6 Rh2 31. Rg8 Bg3+ 32. Kg7 Bh4+ 33. Kh8 Rgh1 34. Nd4 Qe8 35. Rfh6 f6 36. f4 Bf2 37. e4 Bg1 38. f5 Kc5 39. fxe6 f5 40. e5 Ng6+ 41. Kg7 Ne7 42. Kh8 Nec6 43. e7 Qh5 44. e8=B f4 45. Rf6 f3 46. Bg6 f2 47. Bg2 f1=Q 48. Bf5 Qh6 49. Bd5 Qe2 50. e6 Rh3 51. e7 R1h2 52. e8=Q Rh4 53. d3 Rg4 54. Qe4 Qf2 55. Qh1 Qe2 56. Bf4 Qf2 57. Qdf3 Qe2 58. Bg3 Kb4 59. Nd2 Ka5 60. Ne6 Ne5 61. a4 b5 62. axb5+ Kb4 63. Rf1 a5 64. b6 a4 65. b7 Nbc6 66. Bde4 Nc4 67. d4 Nd6 68. d5 Nd4 69. c4 c6 70. dxc6 Ne8 71. c5 d5 72. Nc4 a3 73. c7 a2 74. Ne5 a1=Q 75. Nd7 Ka4 76. b8=Q Ra5 77. Qb6 Ba6 78. c8=Q Bc4 79. c6 Qa3 80. c7 Nc6 81. Qcb7 Ne5 82. c8=Q Qa1 83. Qbb8 Rb5 84. b3+ Ka3 85. Qbe3 Ka2 86. Qec5 d4 87. Qcb6 d3 88. Qbc5 d2 89. Qd4 d1=Q 90. Qde3 Qd6 91. Bd5 Ra5 92. b4 Ra3 93. Qcc5 Qad1 94. Qcd4 Qdd2 95. Qec3 Qdd3 96. Qc1 Qdd2 97. Qdc3 Qd4 98. Qb6 Q4c5 99. Qb5 Qc8 100. Qc5 Qcb8 101. b5 Qc8 102. b6 Rb3 103. Rd1 Qf2 104. Rf1 Qfe3 105. Rd1 Qe2
natelokers commented 3 years ago

a little late, but

  1. h4 g5 2. a4 b5 3. axb5 d5 4. c4 e5 5. f4 Nc6 6. cxd5 Nb8 7. fxe5 Nf6 8. hxg5 Ng8 9. Kf2 Kd7 10. Kg3 Na6 11. e6+ Kd6 12. Kf4 Kc5 13. Ra3 Kb4 14. Rah3 Nc5 15. b6 Nb3 16. e7 Nd4 17. e8=B Nb3 18. Nc3 a5 19. Ne4 a4 20. Nc3 a3 21. Ne4 a2 22. Nc3 a1=Q 23. b7 f5 24. b8=Q+ Bb7 25. Ne4 Nd4 26. b3 Nc2 27. Bb2 Na3 28. Be5 Nc2 29. d3 Ka3 30. b4 h5 31. g6 h4 32. Bd7 Qc3 33. Be6 Qd7 34. Kg5 Ne7 35. g7 Nc6 36. Bf7 Qd6 37. Be6 Qdc5 38. Kg6 Rh5 39. d6 Q5c4 40. d7 f4 41. d8=Q Bc5 42. g8=Q Rf5 43. Kh7 Be3 44. Bd5 Na5 45. g4 f3 46. g5 f2 47. Nf3 Bd2 48. Bg2 f1=Q 49. Rg3 h3 50. Rg4 h2 51. Bh3 Qf2 52. Rhg1 h1=Q 53. Rh4 Rf4 54. g6 Rg4 55. g7 Rf4 56. Qe6 Rg4 57. g8=R Rf4 58. Kh8 Qhh2 59. Rh7 Rf6 60. Bf5 Qh6 61. Qf7 Rc6 62. Bde6 Qb2 63. d4 Qcb3 64. d5 Rc5 65. d6 c6 66. d7 Ra7 67. Qdc7 Rc4 68. d8=Q Bc3 69. e3 Rd4 70. Nc5 Rd3 71. e4 Bd4 72. Bd7 Be3 73. Bf6 Rd4 74. e5 Rd3 75. e6 Rd4 76. e7 Rd3 77. e8=R Rd4 78. Qh5 Rg4 79. Qh1 Rh4 80. Ne6 Ra6 81. Re1 Ka2 82. Nfd4 Na1 83. Qdf3 Nc2 84. Be5 Bd2 85. Bg3 Rh2 86. Rd1 Qfe3 87. Rc1 Be1 88. Rd1 Bf2 89. Rd2 Bg1 90. Rd1 Qe2 91. Nc5 Qbc1 92. Bde6 Rb6 93. Bd5 Ne3 94. Nce6 Rb5 95. Qe5 c5 96. Nc6 c4 97. Ncd4 c3 98. Bg4 c2 99. Nf5 Qb2 100. Nfd4 c1=R 101. Nf5 Rc3 102. Nc5 Qbc4 103. Nd7 Rb3 104. Nd4 Ba6 105. Ne6 Nc2 106. Ref8 Nd4 107. Rf6 Qc6 108. Bf5 Qd6 109. Bde4 Rc5 110. b5 Ndc6 111. Qd4 Ne5 112. Bd5 Rc4 113. Qc5 Nac6 114. b6 Rg4 115. Qfc3 Bc4 116. Qc1 Nd3 117. Q5e3 Nde5 118. Qec3 Nb4 119. Qbc8 Nbd3 120. Qc5 Nb4 121. Qdc7 Nbc6 122. Qb5 Qba3 123. Qc5 Qa8 124. Qd8 Qc8 125. Qe8 Na7 126. Qh5 Qcb8 127. Qhg5 Nc8 128. Qgf4 Qdc7 129. Qff3 Nd6 130. Ndf8 Ne8 131. Nd7 Qd6 132. Ndf8 Qc8 133. Nd7 Qcc7 134. Ndf8 Qc8 135. Nd7 Qh5 136. Rf7 Qg6 137. Rf6 Qh6 138. Q1b2+
tromp commented 3 years ago

You have a mismatch on Qb2 versus Qc1, @cetsai .

Verified. Thanks, Nate!