1nb1k1n1/Np1p1p2/2p1p1pr/6Pp/1p2NP2/rP6/P3P2P/R1BK1B1R b - - 2 20
FEN state: 1nb1k1n1/Np1p1p2/2p1p1pr/6Pp/1p2NP2/rP6/P3P2P/R1BK1B1R b - - 2 20 ; Best move: a3a7
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8 and black knight at g8. White knight at a7, black pawn at b7, black pawn at d7 and black pawn at f7. Black pawn at c6, black pawn at e6, black pawn at g6 and black rook at h6. White pawn at g5 and black pawn at h5. Black pawn at b4, white knight at e4 and white pawn at f4. Black rook at a3 and white pawn at b3. White pawn at a2, white pawn at e2 and white pawn at h2. White rook at a1, white bishop at c1, white king at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 20. Black to move.