r1b1k2r/p1p2p1p/p4n2/P3p1p1/1bpPP3/B1N1QP2/6PP/R3K1NR b KQ - 6 20
FEN state: r1b1k2r/p1p2p1p/p4n2/P3p1p1/1bpPP3/B1N1QP2/6PP/R3K1NR b KQ - 6 20 ; Best move: b4a5
The current state of the chess board is: Black rook at a8, black bishop at c8, black king at e8 and black rook at h8. Black pawn at a7, black pawn at c7, black pawn at f7 and black pawn at h7. Black pawn at a6 and black knight at f6. White pawn at a5, black pawn at e5 and black pawn at g5. Black bishop at b4, black pawn at c4, white pawn at d4 and white pawn at e4. White bishop at a3, white knight at c3, white queen at e3 and white pawn at f3. White pawn at g2 and white pawn at h2. White rook at a1, white king at e1, white knight at g1 and white rook at h1. White kingside and white queenside castles are available. Half move number is 6. Full move number is 20. Black to move.