r1b2bn1/p1p1kq1r/1n5p/Pp1p1pp1/3P4/1P3PPN/1RQ1P2P/2B1KBNR w K - 9 17
FEN state: r1b2bn1/p1p1kq1r/1n5p/Pp1p1pp1/3P4/1P3PPN/1RQ1P2P/2B1KBNR w K - 9 17 ; Best move: a5b6
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black knight at g8. Black pawn at a7, black pawn at c7, black king at e7, black queen at f7 and black rook at h7. Black knight at b6 and black pawn at h6. White pawn at a5, black pawn at b5, black pawn at d5, black pawn at f5 and black pawn at g5. White pawn at d4. White pawn at b3, white pawn at f3, white pawn at g3 and white knight at h3. White rook at b2, white queen at c2, white pawn at e2 and white pawn at h2. 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 9. Full move number is 17. White to move.