1nb1k2r/r1pp3p/5pp1/1pb1pn2/1PPPP3/6PQ/5P1P/R1N1KB1R w KQ - 1 18
FEN state: 1nb1k2r/r1pp3p/5pp1/1pb1pn2/1PPPP3/6PQ/5P1P/R1N1KB1R w KQ - 1 18 ; Best move: a1a7
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black rook at a7, black pawn at c7, black pawn at d7 and black pawn at h7. Black pawn at f6 and black pawn at g6. Black pawn at b5, black bishop at c5, black pawn at e5 and black knight at f5. White pawn at b4, white pawn at c4, white pawn at d4 and white pawn at e4. White pawn at g3 and white queen at h3. White pawn at f2 and white pawn at h2. White rook at a1, white knight at c1, white king at e1, white bishop at f1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 1. Full move number is 18. White to move.