r3k2r/3bbp2/ppqp4/P1p4p/1BNPQ3/1P2P1PP/3P1n2/R3KB1R w KQkq - 0 23
FEN state: r3k2r/3bbp2/ppqp4/P1p4p/1BNPQ3/1P2P1PP/3P1n2/R3KB1R w KQkq - 0 23 ; Best move: c4d6
The current state of the chess board is: Black rook at a8, black king at e8 and black rook at h8. Black bishop at d7, black bishop at e7 and black pawn at f7. Black pawn at a6, black pawn at b6, black queen at c6 and black pawn at d6. White pawn at a5, black pawn at c5 and black pawn at h5. White bishop at b4, white knight at c4, white pawn at d4 and white queen at e4. White pawn at b3, white pawn at e3, white pawn at g3 and white pawn at h3. White pawn at d2 and black knight at f2. White rook at a1, white king at e1, white bishop at f1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 23. White to move.