r2qkbr1/pp2Bbp1/P1np4/RQP3Np/2P1P1p1/2N5/1P1K1PnP/5B1R b - - 4 18
FEN state: r2qkbr1/pp2Bbp1/P1np4/RQP3Np/2P1P1p1/2N5/1P1K1PnP/5B1R b - - 4 18 ; Best move: f8e7
The current state of the chess board is: Black rook at a8, black queen at d8, black king at e8, black bishop at f8 and black rook at g8. Black pawn at a7, black pawn at b7, white bishop at e7, black bishop at f7 and black pawn at g7. White pawn at a6, black knight at c6 and black pawn at d6. White rook at a5, white queen at b5, white pawn at c5, white knight at g5 and black pawn at h5. White pawn at c4, white pawn at e4 and black pawn at g4. White knight at c3. White pawn at b2, white king at d2, white pawn at f2, black knight at g2 and white pawn at h2. White bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 18. Black to move.