rn1q3r/1ppb1p1n/p3k2p/3pB3/2PPN1P1/7B/Pb2PP1P/RQ2K2R w Q - 0 18
FEN state: rn1q3r/1ppb1p1n/p3k2p/3pB3/2PPN1P1/7B/Pb2PP1P/RQ2K2R w Q - 0 18 ; Best move: c4d5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8 and black rook at h8. Black pawn at b7, black pawn at c7, black bishop at d7, black pawn at f7 and black knight at h7. Black pawn at a6, black king at e6 and black pawn at h6. Black pawn at d5 and white bishop at e5. White pawn at c4, white pawn at d4, white knight at e4 and white pawn at g4. White bishop at h3. White pawn at a2, black bishop at b2, white pawn at e2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at b1, white king at e1 and white rook at h1. White queenside is the only castle move available. Half move number is 0. Full move number is 18. White to move.