2r1kb1r/4nppp/np6/Pq1p4/R2pPP2/5NP1/N1P5/2BQKb1R w Kk - 2 18
FEN state: 2r1kb1r/4nppp/np6/Pq1p4/R2pPP2/5NP1/N1P5/2BQKb1R w Kk - 2 18 ; Best move: a4d4
The current state of the chess board is: Black rook at c8, black king at e8, black bishop at f8 and black rook at h8. Black knight at e7, black pawn at f7, black pawn at g7 and black pawn at h7. Black knight at a6 and black pawn at b6. White pawn at a5, black queen at b5 and black pawn at d5. White rook at a4, black pawn at d4, white pawn at e4 and white pawn at f4. White knight at f3 and white pawn at g3. White knight at a2 and white pawn at c2. White bishop at c1, white queen at d1, white king at e1, black bishop at f1 and white rook at h1. White kingside and black kingside castles are available. Half move number is 2. Full move number is 18. White to move.