rQb1kb1r/3qpp2/p7/1ppp2pp/1P1n3P/2NKP3/P1PP4/R1B2BNn w kq - 4 18
FEN state: rQb1kb1r/3qpp2/p7/1ppp2pp/1P1n3P/2NKP3/P1PP4/R1B2BNn w kq - 4 18 ; Best move: c3e4
The current state of the chess board is: Black rook at a8, white queen at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black queen at d7, black pawn at e7 and black pawn at f7. Black pawn at a6. Black pawn at b5, black pawn at c5, black pawn at d5, black pawn at g5 and black pawn at h5. White pawn at b4, black knight at d4 and white pawn at h4. White knight at c3, white king at d3 and white pawn at e3. White pawn at a2, white pawn at c2 and white pawn at d2. White rook at a1, white bishop at c1, white bishop at f1, white knight at g1 and black knight at h1. Black kingside and black queenside castles are available. Half move number is 4. Full move number is 18. White to move.