rn3b1r/Rbp1k2q/1P5n/1B1pp1pp/6P1/1PP2p2/3PNP1P/1NBQ1K1R w - - 4 18
FEN state: rn3b1r/Rbp1k2q/1P5n/1B1pp1pp/6P1/1PP2p2/3PNP1P/1NBQ1K1R w - - 4 18 ; Best move: a7b7
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at f8 and black rook at h8. White rook at a7, black bishop at b7, black pawn at c7, black king at e7 and black queen at h7. White pawn at b6 and black knight at h6. White bishop at b5, black pawn at d5, black pawn at e5, black pawn at g5 and black pawn at h5. White pawn at g4. White pawn at b3, white pawn at c3 and black pawn at f3. White pawn at d2, white knight at e2, white pawn at f2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. White to move.