r1b1kb1r/p1ppq1pp/5p1n/1p6/Q2Pp1P1/N2P3P/PP2PP2/R1BK1BNR b kq - 1 10
FEN state: r1b1kb1r/p1ppq1pp/5p1n/1p6/Q2Pp1P1/N2P3P/PP2PP2/R1BK1BNR b kq - 1 10 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at d7, black queen at e7, black pawn at g7 and black pawn at h7. Black pawn at f6 and black knight at h6. Black pawn at b5. White queen at a4, white pawn at d4, black pawn at e4 and white pawn at g4. White knight at a3, white pawn at d3 and white pawn at h3. White pawn at a2, white pawn at b2, white pawn at e2 and white pawn at f2. White rook at a1, white bishop at c1, white king 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 1. Full move number is 10. Black to move.