rnb4r/3k2bp/pp1p1pq1/2p1p1p1/1PPPPn2/B4P1P/P2N1QP1/R2KNB1R b - - 4 18
FEN state: rnb4r/3k2bp/pp1p1pq1/2p1p1p1/1PPPPn2/B4P1P/P2N1QP1/R2KNB1R b - - 4 18 ; Best move: e5d4
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8 and black rook at h8. Black king at d7, black bishop at g7 and black pawn at h7. Black pawn at a6, black pawn at b6, black pawn at d6, black pawn at f6 and black queen at g6. Black pawn at c5, black pawn at e5 and black pawn at g5. White pawn at b4, white pawn at c4, white pawn at d4, white pawn at e4 and black knight at f4. White bishop at a3, white pawn at f3 and white pawn at h3. White pawn at a2, white knight at d2, white queen at f2 and white pawn at g2. White rook at a1, white king at d1, white knight at e1, 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.