r1qk2n1/nb1p2br/1Rp2p1p/4p3/P3P2p/B1p2NPN/2PPKP1P/1R6 b - - 1 23
FEN state: r1qk2n1/nb1p2br/1Rp2p1p/4p3/P3P2p/B1p2NPN/2PPKP1P/1R6 b - - 1 23 ; Best move: b7a6
The current state of the chess board is: Black rook at a8, black queen at c8, black king at d8 and black knight at g8. Black knight at a7, black bishop at b7, black pawn at d7, black bishop at g7 and black rook at h7. White rook at b6, black pawn at c6, black pawn at f6 and black pawn at h6. Black pawn at e5. White pawn at a4, white pawn at e4 and black pawn at h4. White bishop at a3, black pawn at c3, white knight at f3, white pawn at g3 and white knight at h3. White pawn at c2, white pawn at d2, white king at e2, white pawn at f2 and white pawn at h2. White rook at b1. Both players have exhausted their castles. Half move number is 1. Full move number is 23. Black to move.