1q2k1br/P4R2/NB1p1r1R/1KR1QB1p/5p1P/1N4p1/BRP2Pr1/n4Q1r b k - 0 1

tromp / ChessPositionRanking

Software suite for ranking chess positions and accurately estimating the number of legal chess positions

MIT License

138 stars 7 forks source link

Closed tromp closed 3 years ago

tromp commented 3 years ago

1q2k1br/P4R2/NB1p1r1R/1KR1QB1p/5p1P/1N4p1/BRP2Pr1/n4Q1r b k - 0 1

Single Check wx 0 wp 4 wpr 4 wpx 0 maxuwp 2 minopp 2 bx 4 bp 4 bpr 2 bpx 2 maxubp 2 minopp 2

Illegal since black kingside castling requires sacrifice of both bishop and knight to promote just one of white e and g pawns.

ruedigerj commented 3 years ago

I concur