r6r/1ppkq1pp/5p1n/p1B2b1Q/3p1Nn1/PP3P2/R1PNP2P/4KB1R w K - 0 21
FEN state: r6r/1ppkq1pp/5p1n/p1B2b1Q/3p1Nn1/PP3P2/R1PNP2P/4KB1R w K - 0 21 ; Best move: c5e7
The current state of the chess board is: Black rook at a8 and black rook at h8. Black pawn at b7, black pawn at c7, black king at d7, black queen at e7, black pawn at g7 and black pawn at h7. Black pawn at f6 and black knight at h6. Black pawn at a5, white bishop at c5, black bishop at f5 and white queen at h5. Black pawn at d4, white knight at f4 and black knight at g4. White pawn at a3, white pawn at b3 and white pawn at f3. White rook at a2, white pawn at c2, white knight at d2, white pawn at e2 and white pawn at h2. White king at e1, white bishop at f1 and white rook at h1. White kingside is the only castle move available. Half move number is 0. Full move number is 21. White to move.