r1bnk2r/3pn1p1/p4p1p/1p2p3/q1Q3P1/N1p1P2N/P3BP1P/R1B1K2R w KQkq - 9 18
FEN state: r1bnk2r/3pn1p1/p4p1p/1p2p3/q1Q3P1/N1p1P2N/P3BP1P/R1B1K2R w KQkq - 9 18 ; Best move: c4a4
The current state of the chess board is: Black rook at a8, black bishop at c8, black knight at d8, black king at e8 and black rook at h8. Black pawn at d7, black knight at e7 and black pawn at g7. Black pawn at a6, black pawn at f6 and black pawn at h6. Black pawn at b5 and black pawn at e5. Black queen at a4, white queen at c4 and white pawn at g4. White knight at a3, black pawn at c3, white pawn at e3 and white knight at h3. White pawn at a2, white bishop at e2, white pawn at f2 and white pawn at h2. White rook at a1, white bishop at c1, white king at e1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 9. Full move number is 18. White to move.