r1bq3r/1pppp1k1/5n1p/p3bp2/Pn2PPp1/RPPB4/1B1P1NPP/1N1Q1K1R w - - 4 18
FEN state: r1bq3r/1pppp1k1/5n1p/p3bp2/Pn2PPp1/RPPB4/1B1P1NPP/1N1Q1K1R w - - 4 18 ; Best move: f4e5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at b7, black pawn at c7, black pawn at d7, black pawn at e7 and black king at g7. Black knight at f6 and black pawn at h6. Black pawn at a5, black bishop at e5 and black pawn at f5. White pawn at a4, black knight at b4, white pawn at e4, white pawn at f4 and black pawn at g4. White rook at a3, white pawn at b3, white pawn at c3 and white bishop at d3. White bishop at b2, white pawn at d2, white knight at f2, white pawn at g2 and white pawn at h2. White knight at b1, 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.