5r1r/1pp1bk1p/p4np1/nq1ppb2/1PPP4/PN2PP1P/2R3BR/2BQK1N1 w - - 1 18
FEN state: 5r1r/1pp1bk1p/p4np1/nq1ppb2/1PPP4/PN2PP1P/2R3BR/2BQK1N1 w - - 1 18 ; Best move: c4b5
The current state of the chess board is: Black rook at f8 and black rook at h8. Black pawn at b7, black pawn at c7, black bishop at e7, black king at f7 and black pawn at h7. Black pawn at a6, black knight at f6 and black pawn at g6. Black knight at a5, black queen at b5, black pawn at d5, black pawn at e5 and black bishop at f5. White pawn at b4, white pawn at c4 and white pawn at d4. White pawn at a3, white knight at b3, white pawn at e3, white pawn at f3 and white pawn at h3. White rook at c2, white bishop at g2 and white rook at h2. White bishop at c1, white queen at d1, white king at e1 and white knight at g1. Both players have exhausted their castles. Half move number is 1. Full move number is 18. White to move.