rnb1kbnr/pp1pp1pp/5p2/1q6/P2p1PP1/7P/1B2PK2/RN1Q1BNR w kq - 0 10
FEN state: rnb1kbnr/pp1pp1pp/5p2/1q6/P2p1PP1/7P/1B2PK2/RN1Q1BNR w kq - 0 10 ; Best move: a4b5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black king at e8, black bishop at f8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at b7, black pawn at d7, black pawn at e7, black pawn at g7 and black pawn at h7. Black pawn at f6. Black queen at b5. White pawn at a4, black pawn at d4, white pawn at f4 and white pawn at g4. White pawn at h3. White bishop at b2, white pawn at e2 and white king at f2. White rook at a1, white knight at b1, white queen at d1, white bishop at f1, white knight at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 10. White to move.