rnbqk1r1/1p2n1bp/p2p1p2/2p1p1B1/P7/3PPP1N/1PPQ2PP/RN1K1BR1 b q - 0 10
FEN state: rnbqk1r1/1p2n1bp/p2p1p2/2p1p1B1/P7/3PPP1N/1PPQ2PP/RN1K1BR1 b q - 0 10 ; Best move: f6g5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at d8, black king at e8 and black rook at g8. Black pawn at b7, black knight at e7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at d6 and black pawn at f6. Black pawn at c5, black pawn at e5 and white bishop at g5. White pawn at a4. White pawn at d3, white pawn at e3, white pawn at f3 and white knight at h3. White pawn at b2, white pawn at c2, white queen at d2, white pawn at g2 and white pawn at h2. White rook at a1, white knight at b1, white king at d1, white bishop at f1 and white rook at g1. Black queenside is the only castle move available. Half move number is 0. Full move number is 10. Black to move.