r1bqkb1r/1p1p3p/2p2p2/p1n1pnp1/1P4P1/3PP2Q/P1P2P1P/RNBK1BNR b kq - 0 10
FEN state: r1bqkb1r/1p1p3p/2p2p2/p1n1pnp1/1P4P1/3PP2Q/P1P2P1P/RNBK1BNR b kq - 0 10 ; Best move: a5b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8, black king at e8, black bishop at f8 and black rook at h8. Black pawn at b7, black pawn at d7 and black pawn at h7. Black pawn at c6 and black pawn at f6. Black pawn at a5, black knight at c5, black pawn at e5, black knight at f5 and black pawn at g5. White pawn at b4 and white pawn at g4. White pawn at d3, white pawn at e3 and white queen at h3. White pawn at a2, white pawn at c2, white pawn at f2 and white pawn at h2. White rook at a1, white knight at b1, 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 0. Full move number is 10. Black to move.