1nb1kb2/rp2P3/B1pr1p1n/1q4p1/1B4Pp/4PP1P/PPPNR1KR/6N1 b - - 2 23
FEN state: 1nb1kb2/rp2P3/B1pr1p1n/1q4p1/1B4Pp/4PP1P/PPPNR1KR/6N1 b - - 2 23 ; Best move: b5b4
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8 and black bishop at f8. Black rook at a7, black pawn at b7 and white pawn at e7. White bishop at a6, black pawn at c6, black rook at d6, black pawn at f6 and black knight at h6. Black queen at b5 and black pawn at g5. White bishop at b4, white pawn at g4 and black pawn at h4. White pawn at e3, white pawn at f3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at c2, white knight at d2, white rook at e2, white king at g2 and white rook at h2. White knight at g1. Both players have exhausted their castles. Half move number is 2. Full move number is 23. Black to move.