r6r/4Bk1N/np2bp1n/pP1p1q2/2B1P2P/5PP1/P1PP4/RNQ1K1b1 b Q - 0 18
FEN state: r6r/4Bk1N/np2bp1n/pP1p1q2/2B1P2P/5PP1/P1PP4/RNQ1K1b1 b Q - 0 18 ; Best move: f5f3
The current state of the chess board is: Black rook at a8 and black rook at h8. White bishop at e7, black king at f7 and white knight at h7. Black knight at a6, black pawn at b6, black bishop at e6, black pawn at f6 and black knight at h6. Black pawn at a5, white pawn at b5, black pawn at d5 and black queen at f5. White bishop at c4, white pawn at e4 and white pawn at h4. White pawn at f3 and white pawn at g3. White pawn at a2, white pawn at c2 and white pawn at d2. White rook at a1, white knight at b1, white queen at c1, white king at e1 and black bishop at g1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. Black to move.