r1b2b1r/2q1kp2/npp2np1/3pp2p/p1B1PP2/N6N/PPPP2PP/1RB2QKR b - - 0 15
FEN state: r1b2b1r/2q1kp2/npp2np1/3pp2p/p1B1PP2/N6N/PPPP2PP/1RB2QKR b - - 0 15 ; Best move: d5c4
The current state of the chess board is: Black rook at a8, black bishop at c8, black bishop at f8 and black rook at h8. Black queen at c7, black king at e7 and black pawn at f7. Black knight at a6, black pawn at b6, black pawn at c6, black knight at f6 and black pawn at g6. Black pawn at d5, black pawn at e5 and black pawn at h5. Black pawn at a4, white bishop at c4, white pawn at e4 and white pawn at f4. White knight at a3 and white knight at h3. White pawn at a2, white pawn at b2, white pawn at c2, white pawn at d2, white pawn at g2 and white pawn at h2. White rook at b1, white bishop at c1, white queen at f1, white king at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 0. Full move number is 15. Black to move.