r1bq1bnr/2ppp1pp/1p3p1k/p7/1P2PPQP/B4N2/P1PP2PR/RN2KB2 w Q - 0 10
FEN state: r1bq1bnr/2ppp1pp/1p3p1k/p7/1P2PPQP/B4N2/P1PP2PR/RN2KB2 w Q - 0 10 ; Best move: g4g5
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black pawn at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at b6, black pawn at f6 and black king at h6. Black pawn at a5. White pawn at b4, white pawn at e4, white pawn at f4, white queen at g4 and white pawn at h4. White bishop at a3 and white knight at f3. White pawn at a2, white pawn at c2, white pawn at d2, white pawn at g2 and white rook at h2. White rook at a1, white knight at b1, white king at e1 and white bishop at f1. White queenside is the only castle move available. Half move number is 0. Full move number is 10. White to move.