2bqkbnr/r2p2pp/3p4/pp2ppN1/2P4P/3P1PP1/PP2QP2/R1B1KB1R w k - 0 18
FEN state: 2bqkbnr/r2p2pp/3p4/pp2ppN1/2P4P/3P1PP1/PP2QP2/R1B1KB1R w k - 0 18 ; Best move: c4b5
The current state of the chess board is: Black bishop at c8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black rook at a7, black pawn at d7, black pawn at g7 and black pawn at h7. Black pawn at d6. Black pawn at a5, black pawn at b5, black pawn at e5, black pawn at f5 and white knight at g5. White pawn at c4 and white pawn at h4. White pawn at d3, white pawn at f3 and white pawn at g3. White pawn at a2, white pawn at b2, white queen at e2 and white pawn at f2. White rook at a1, white bishop at c1, white king at e1, white bishop at f1 and white rook at h1. Black kingside is the only castle move available. Half move number is 0. Full move number is 18. White to move.