rq5r/2p1npkN/6p1/pQ1pP2P/8/1PP2b1P/P3P1R1/RNb1KB2 b Q - 1 18
FEN state: rq5r/2p1npkN/6p1/pQ1pP2P/8/1PP2b1P/P3P1R1/RNb1KB2 b Q - 1 18 ; Best move: b8b5
The current state of the chess board is: Black rook at a8, black queen at b8 and black rook at h8. Black pawn at c7, black knight at e7, black pawn at f7, black king at g7 and white knight at h7. Black pawn at g6. Black pawn at a5, white queen at b5, black pawn at d5, white pawn at e5 and white pawn at h5. White pawn at b3, white pawn at c3, black bishop at f3 and white pawn at h3. White pawn at a2, white pawn at e2 and white rook at g2. White rook at a1, white knight at b1, black bishop at c1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 1. Full move number is 18. Black to move.