1rb2k1r/p7/n1pp1N1b/1pqp1n1p/PP3PpP/2P1PNP1/1RK5/2BQ1B1R b - - 0 20
FEN state: 1rb2k1r/p7/n1pp1N1b/1pqp1n1p/PP3PpP/2P1PNP1/1RK5/2BQ1B1R b - - 0 20 ; Best move: a6b4
The current state of the chess board is: Black rook at b8, black bishop at c8, black king at f8 and black rook at h8. Black pawn at a7. Black knight at a6, black pawn at c6, black pawn at d6, white knight at f6 and black bishop at h6. Black pawn at b5, black queen at c5, black pawn at d5, black knight at f5 and black pawn at h5. White pawn at a4, white pawn at b4, white pawn at f4, black pawn at g4 and white pawn at h4. White pawn at c3, white pawn at e3, white knight at f3 and white pawn at g3. White rook at b2 and white king at c2. White bishop at c1, white queen at d1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 20. Black to move.