r2qkbnr/2p2bpp/3p1p2/pp2P3/Pn1Q4/4PNBP/1PP2PP1/RN2KB1R w KQkq - 0 10
FEN state: r2qkbnr/2p2bpp/3p1p2/pp2P3/Pn1Q4/4PNBP/1PP2PP1/RN2KB1R w KQkq - 0 10 ; Best move: f1b5
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at c7, black bishop at f7, black pawn at g7 and black pawn at h7. Black pawn at d6 and black pawn at f6. Black pawn at a5, black pawn at b5 and white pawn at e5. White pawn at a4, black knight at b4 and white queen at d4. White pawn at e3, white knight at f3, white bishop at g3 and white pawn at h3. White pawn at b2, white pawn at c2, white pawn at f2 and white pawn at g2. White rook at a1, white knight at b1, white king at e1, white bishop at f1 and white rook at h1. White kingside, white queenside, black kingside and black queenside castles are available. Half move number is 0. Full move number is 10. White to move.