1n1q1kn1/r2pb1pr/8/ppp1p2P/3Pbp2/PPP2P1N/4P1B1/RNBQ1K1R b - - 4 18
FEN state: 1n1q1kn1/r2pb1pr/8/ppp1p2P/3Pbp2/PPP2P1N/4P1B1/RNBQ1K1R b - - 4 18 ; Best move: e4b1
The current state of the chess board is: Black knight at b8, black queen at d8, black king at f8 and black knight at g8. Black rook at a7, black pawn at d7, black bishop at e7, black pawn at g7 and black rook at h7. Black pawn at a5, black pawn at b5, black pawn at c5, black pawn at e5 and white pawn at h5. White pawn at d4, black bishop at e4 and black pawn at f4. White pawn at a3, white pawn at b3, white pawn at c3, white pawn at f3 and white knight at h3. White pawn at e2 and white bishop at g2. White rook at a1, white knight at b1, white bishop at c1, white queen at d1, white king 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.