r2q1b1r/1bpnp1p1/N4k2/p4n1p/PPBppP1P/8/3P2PR/1RBQ1K2 b - - 4 20
FEN state: r2q1b1r/1bpnp1p1/N4k2/p4n1p/PPBppP1P/8/3P2PR/1RBQ1K2 b - - 4 20 ; Best move: d7b6
The current state of the chess board is: Black rook at a8, black queen at d8, black bishop at f8 and black rook at h8. Black bishop at b7, black pawn at c7, black knight at d7, black pawn at e7 and black pawn at g7. White knight at a6 and black king at f6. Black pawn at a5, black knight at f5 and black pawn at h5. White pawn at a4, white pawn at b4, white bishop at c4, black pawn at d4, black pawn at e4, white pawn at f4 and white pawn at h4. White pawn at d2, white pawn at g2 and white rook at h2. White rook at b1, white bishop at c1, white queen at d1 and white king at f1. Both players have exhausted their castles. Half move number is 4. Full move number is 20. Black to move.