1nb1kb1r/r1pp1p2/pP3n2/5P1p/1P6/2P3BP/4P1P1/RN1K1BNR b - - 0 20
FEN state: 1nb1kb1r/r1pp1p2/pP3n2/5P1p/1P6/2P3BP/4P1P1/RN1K1BNR b - - 0 20 ; Best move: a7b7
The current state of the chess board is: Black knight at b8, black bishop at c8, black king at e8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at c7, black pawn at d7 and black pawn at f7. Black pawn at a6, white pawn at b6 and black knight at f6. White pawn at f5 and black pawn at h5. White pawn at b4. White pawn at c3, white bishop at g3 and white pawn at h3. White pawn at e2 and white pawn at g2. White rook at a1, white knight at b1, white king at d1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.