Closed tromp closed 3 years ago
5r2/2r3Q1/1P1q1nK1/2p1b3/NQ1B1Q2/1B1pN1bB/rRbB3P/1BRQn2k b - - 0 1
No Checks wx 0 wp 2 wpr 6 wpx 0 maxuwp 2 minopp 0 bx 4 bp 2 bpr 2 bpx 4 maxubp 2 minopp 0
Illegal since black has pawns left on c and d file, while getting 12 possible promotions from 4 captured pawns requires the 4 captures be between a&b, c&d, e&f, and g&h files.
5r2/2r3Q1/1P1q1nK1/2p1b3/NQ1B1Q2/1B1pN1bB/rRbB3P/1BRQn2k b - - 0 1
No Checks wx 0 wp 2 wpr 6 wpx 0 maxuwp 2 minopp 0 bx 4 bp 2 bpr 2 bpx 4 maxubp 2 minopp 0
Illegal since black has pawns left on c and d file, while getting 12 possible promotions from 4 captured pawns requires the 4 captures be between a&b, c&d, e&f, and g&h files.