r3k1nr/p2p4/n4p2/1qbbp1pp/BpPPN2P/B3PP2/6P1/RN2Q1KR b kq - 0 20
FEN state: r3k1nr/p2p4/n4p2/1qbbp1pp/BpPPN2P/B3PP2/6P1/RN2Q1KR b kq - 0 20 ; Best move: b5a4
The current state of the chess board is: Black rook at a8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7 and black pawn at d7. Black knight at a6 and black pawn at f6. Black queen at b5, black bishop at c5, black bishop at d5, black pawn at e5, black pawn at g5 and black pawn at h5. White bishop at a4, black pawn at b4, white pawn at c4, white pawn at d4, white knight at e4 and white pawn at h4. White bishop at a3, white pawn at e3 and white pawn at f3. White pawn at g2. White rook at a1, white knight at b1, white queen at e1, white king at g1 and white rook at h1. Black kingside and black queenside castles are available. Half move number is 0. Full move number is 20. Black to move.