r1bqkr2/p1p1ppb1/3p3n/Pp3Pp1/1nPP3p/1N4PB/4PB1P/RQ2K1NR w KQq - 0 18
FEN state: r1bqkr2/p1p1ppb1/3p3n/Pp3Pp1/1nPP3p/1N4PB/4PB1P/RQ2K1NR w KQq - 0 18 ; Best move: c4b5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8 and black rook at f8. Black pawn at a7, black pawn at c7, black pawn at e7, black pawn at f7 and black bishop at g7. Black pawn at d6 and black knight at h6. White pawn at a5, black pawn at b5, white pawn at f5 and black pawn at g5. Black knight at b4, white pawn at c4, white pawn at d4 and black pawn at h4. White knight at b3, white pawn at g3 and white bishop at h3. White pawn at e2, white bishop at f2 and white pawn at h2. White rook at a1, white queen at b1, white king at e1, white knight at g1 and white rook at h1. White kingside, white queenside and black queenside castles are available. Half move number is 0. Full move number is 18. White to move.