r1b1q2r/1p1pn1pp/2p1p1k1/Q4p2/1b1nPB2/2PP2PP/PP2BP1R/RN2K1N1 b Q - 0 12
FEN state: r1b1q2r/1p1pn1pp/2p1p1k1/Q4p2/1b1nPB2/2PP2PP/PP2BP1R/RN2K1N1 b Q - 0 12 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at e8 and black rook at h8. Black pawn at b7, black pawn at d7, black knight at e7, black pawn at g7 and black pawn at h7. Black pawn at c6, black pawn at e6 and black king at g6. White queen at a5 and black pawn at f5. Black bishop at b4, black knight at d4, white pawn at e4 and white bishop at f4. White pawn at c3, white pawn at d3, white pawn at g3 and white pawn at h3. White pawn at a2, white pawn at b2, white bishop at e2, white pawn at f2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white knight at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 12. Black to move.