1nb2b1r/1p3p2/1P1kpnp1/2p1N3/r2PpP1p/1P6/2P2KPP/1NBQ3R b - - 0 18
FEN state: 1nb2b1r/1p3p2/1P1kpnp1/2p1N3/r2PpP1p/1P6/2P2KPP/1NBQ3R b - - 0 18 ; Best move: a4a8
The current state of the chess board is: Black knight at b8, black bishop at c8, black bishop at f8 and black rook at h8. Black pawn at b7 and black pawn at f7. White pawn at b6, black king at d6, black pawn at e6, black knight at f6 and black pawn at g6. Black pawn at c5 and white knight at e5. Black rook at a4, white pawn at d4, black pawn at e4, white pawn at f4 and black pawn at h4. White pawn at b3. White pawn at c2, white king at f2, white pawn at g2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 18. Black to move.