r1b1k2r/p2p1p1p/n1p1p1pn/1p2PqP1/4R2P/BPNP1N2/P1P3B1/RQ1K4 b k - 4 24
FEN state: r1b1k2r/p2p1p1p/n1p1p1pn/1p2PqP1/4R2P/BPNP1N2/P1P3B1/RQ1K4 b k - 4 24 ; Best move: b5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at a6, black pawn at c6, black pawn at e6, black pawn at g6 and black knight at h6. Black pawn at b5, white pawn at e5, black queen at f5 and white pawn at g5. White rook at e4 and white pawn at h4. White bishop at a3, white pawn at b3, white knight at c3, white pawn at d3 and white knight at f3. White pawn at a2, white pawn at c2 and white bishop at g2. White rook at a1, white queen at b1 and white king at d1. Black kingside is the only castle move available. Half move number is 4. Full move number is 24. Black to move.