r2q2nr/p2npk2/1p1p2pp/PNp2b1Q/1P1b4/3Rp1PP/2PP1P2/2B1KBNR w K - 2 18
FEN state: r2q2nr/p2npk2/1p1p2pp/PNp2b1Q/1P1b4/3Rp1PP/2PP1P2/2B1KBNR w K - 2 18 ; Best move: b5d4
The current state of the chess board is: Black rook at a8, black queen at d8, black knight at g8 and black rook at h8. Black pawn at a7, black knight at d7, black pawn at e7 and black king at f7. Black pawn at b6, black pawn at d6, black pawn at g6 and black pawn at h6. White pawn at a5, white knight at b5, black pawn at c5, black bishop at f5 and white queen at h5. White pawn at b4 and black bishop at d4. White rook at d3, black pawn at e3, white pawn at g3 and white pawn at h3. White pawn at c2, white pawn at d2 and white pawn at f2. White bishop at c1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside is the only castle move available. Half move number is 2. Full move number is 18. White to move.