1nB2b1r/rp2kp2/p4n1p/2ppp1p1/1B1q1NP1/1P2PQ2/P1PN1P1P/R3K2R b Q - 2 18
FEN state: 1nB2b1r/rp2kp2/p4n1p/2ppp1p1/1B1q1NP1/1P2PQ2/P1PN1P1P/R3K2R b Q - 2 18 ; Best move: d4b4
The current state of the chess board is: Black knight at b8, white bishop at c8, black bishop at f8 and black rook at h8. Black rook at a7, black pawn at b7, black king at e7 and black pawn at f7. Black pawn at a6, black knight at f6 and black pawn at h6. Black pawn at c5, black pawn at d5, black pawn at e5 and black pawn at g5. White bishop at b4, black queen at d4, white knight at f4 and white pawn at g4. White pawn at b3, white pawn at e3 and white queen at f3. White pawn at a2, white pawn at c2, white knight at d2, white pawn at f2 and white pawn at h2. White rook at a1, white king at e1 and white rook at h1. White queenside is the only castle move available. Half move number is 2. Full move number is 18. Black to move.