1nb1k1nr/r1pp1p2/p3p2p/1q1R4/QP3P1b/3PP3/1B2NNp1/1R2K3 b k - 1 23
FEN state: 1nb1k1nr/r1pp1p2/p3p2p/1q1R4/QP3P1b/3PP3/1B2NNp1/1R2K3 b k - 1 23 ; Best move: b5a4
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at c7, black pawn at d7 and black pawn at f7. Black pawn at a6, black pawn at e6 and black pawn at h6. Black queen at b5 and white rook at d5. White queen at a4, white pawn at b4, white pawn at f4 and black bishop at h4. White pawn at d3 and white pawn at e3. White bishop at b2, white knight at e2, white knight at f2 and black pawn at g2. White rook at b1 and white king at e1. Black kingside is the only castle move available. Half move number is 1. Full move number is 23. Black to move.