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tromp / ChessPositionRanking

Software suite for ranking chess positions and accurately estimating the number of legal chess positions
MIT License
148 stars 7 forks source link

1B2n1N1/Rbq5/2Qn1PK1/r1NqPN2/Nr2Rq2/Pk2B2B/1P5b/1rB2r2 b - - 0 1 #909

Closed tromp closed 3 years ago

tromp commented 3 years ago

1B2n1N1/Rbq5/2Qn1PK1/r1NqPN2/Nr2Rq2/Pk2B2B/1P5b/1rB2r2 b - - 0 1

img

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

Illegal since getting 12 possible promotions from 4 captured black pawns requires white doubling pawns in each of a&b, c&d, e&f, and f&g file-pairs.