2b1kb1r/rp3p2/3p1npp/p1pp4/2B2P2/Nn1PP3/PPP2P1P/1R1QKR2 w k - 3 18
FEN state: 2b1kb1r/rp3p2/3p1npp/p1pp4/2B2P2/Nn1PP3/PPP2P1P/1R1QKR2 w k - 3 18 ; Best move: c4b5
The current state of the chess board is: Black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at b7 and black pawn at f7. Black pawn at d6, black knight at f6, black pawn at g6 and black pawn at h6. Black pawn at a5, black pawn at c5 and black pawn at d5. White bishop at c4 and white pawn at f4. White knight at a3, black knight at b3, white pawn at d3 and white pawn at e3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at f2 and white pawn at h2. White rook at b1, white queen at d1, white king at e1 and white rook at f1. Black kingside is the only castle move available. Half move number is 3. Full move number is 18. White to move.