r2qkb1r/pp2p1pp/3p1p2/n1pP4/P4PQ1/4P1Pb/1PP2n1P/RNB1KBNR w KQkq - 0 10
FEN state: r2qkb1r/pp2p1pp/3p1p2/n1pP4/P4PQ1/4P1Pb/1PP2n1P/RNB1KBNR 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 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at d6 and black pawn at f6. Black knight at a5, black pawn at c5 and white pawn at d5. White pawn at a4, white pawn at f4 and white queen at g4. White pawn at e3, white pawn at g3 and black bishop at h3. White pawn at b2, white pawn at c2, black knight at f2 and white pawn at h2. White rook at a1, white knight at b1, white bishop at c1, 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 0. Full move number is 10. White to move.