1rb1k1nr/p3pp2/3p1npb/qp4Np/R1Np1BP1/2P5/1P2PP1P/3QKB1R b Kk - 3 20
FEN state: 1rb1k1nr/p3pp2/3p1npb/qp4Np/R1Np1BP1/2P5/1P2PP1P/3QKB1R b Kk - 3 20 ; Best move: a5a4
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at e8, black knight at g8 and black rook at h8. Black pawn at a7, black pawn at e7 and black pawn at f7. Black pawn at d6, black knight at f6, black pawn at g6 and black bishop at h6. Black queen at a5, black pawn at b5, white knight at g5 and black pawn at h5. White rook at a4, white knight at c4, black pawn at d4, white bishop at f4 and white pawn at g4. White pawn at c3. White pawn at b2, white pawn at e2, white pawn at f2 and white pawn at h2. White queen at d1, white king at e1, white bishop at f1 and white rook at h1. White kingside and black kingside castles are available. Half move number is 3. Full move number is 20. Black to move.