rnb1k2r/p1qp1p1p/5npb/1p1pp3/1PPP2P1/4P3/P2B1P1P/R2QKBNR w KQkq - 1 10
FEN state: rnb1k2r/p1qp1p1p/5npb/1p1pp3/1PPP2P1/4P3/P2B1P1P/R2QKBNR w KQkq - 1 10 ; Best move: g4g5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black queen at c7, black pawn at d7, black pawn at f7 and black pawn at h7. Black knight at f6, black pawn at g6 and black bishop at h6. Black pawn at b5, black pawn at d5 and black pawn at e5. White pawn at b4, white pawn at c4, white pawn at d4 and white pawn at g4. White pawn at e3. White pawn at a2, white bishop at d2, white pawn at f2 and white pawn at h2. White rook at a1, white queen at d1, white king at e1, white bishop at f1, white knight at g1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 1. Full move number is 10. White to move.