r1bq1k1r/pp1pn2p/5p2/n1p1pp2/1BP1P3/1P3K1P/P2P2P1/RQ1N1BNR w - - 4 18
FEN state: r1bq1k1r/pp1pn2p/5p2/n1p1pp2/1BP1P3/1P3K1P/P2P2P1/RQ1N1BNR w - - 4 18 ; Best move: b4c5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at f8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black knight at e7 and black pawn at h7. Black pawn at f6. Black knight at a5, black pawn at c5, black pawn at e5 and black pawn at f5. White bishop at b4, white pawn at c4 and white pawn at e4. White pawn at b3, white king at f3 and white pawn at h3. White pawn at a2, white pawn at d2 and white pawn at g2. White rook at a1, white queen at b1, white knight at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. White to move.