1nb1kb1r/1p1p4/1rp5/2PNpPqp/pP3P2/1Q6/P2PPnBP/1RB2K1R b k - 1 23
FEN state: 1nb1kb1r/1p1p4/1rp5/2PNpPqp/pP3P2/1Q6/P2PPnBP/1RB2K1R b k - 1 23 ; Best move: g5f5
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7 and black pawn at d7. Black rook at b6 and black pawn at c6. White pawn at c5, white knight at d5, black pawn at e5, white pawn at f5, black queen at g5 and black pawn at h5. Black pawn at a4, white pawn at b4 and white pawn at f4. White queen at b3. White pawn at a2, white pawn at d2, white pawn at e2, black knight at f2, white bishop at g2 and white pawn at h2. White rook at b1, white bishop at c1, white king at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.