rn2qk1r/2p2pbp/p3bn2/1P2p1p1/1PP1P1P1/3K1N1B/1R1PQR2/1NB5 b - - 1 20
FEN state: rn2qk1r/2p2pbp/p3bn2/1P2p1p1/1PP1P1P1/3K1N1B/1R1PQR2/1NB5 b - - 1 20 ; Best move: a6b5
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at e8, black king at f8 and black rook at h8. Black pawn at c7, black pawn at f7, black bishop at g7 and black pawn at h7. Black pawn at a6, black bishop at e6 and black knight at f6. White pawn at b5, black pawn at e5 and black pawn at g5. White pawn at b4, white pawn at c4, white pawn at e4 and white pawn at g4. White king at d3, white knight at f3 and white bishop at h3. White rook at b2, white pawn at d2, white queen at e2 and white rook at f2. White knight at b1 and white bishop at c1. Both players have exhausted their castles. Half move number is 1. Full move number is 20. Black to move.