r3kbnr/p4q2/np4pp/PPpppp2/2N5/2PPP2P/5P2/RNB1KB1b w Qk - 4 18
FEN state: r3kbnr/p4q2/np4pp/PPpppp2/2N5/2PPP2P/5P2/RNB1KB1b w Qk - 4 18 ; Best move: c4e5
The current state of the chess board is: Black rook at a8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7 and black queen at f7. Black knight at a6, black pawn at b6, black pawn at g6 and black pawn at h6. White pawn at a5, white pawn at b5, black pawn at c5, black pawn at d5, black pawn at e5 and black pawn at f5. White knight at c4. White pawn at c3, white pawn at d3, white pawn at e3 and white pawn at h3. White pawn at f2. White rook at a1, white knight at b1, white bishop at c1, white king at e1, white bishop at f1 and black bishop at h1. White queenside and black kingside castles are available. Half move number is 4. Full move number is 18. White to move.