r2k1b1r/p1pnpppp/1P2q2n/8/NQ2p1b1/7N/PP3PPP/R1B2K1R b - - 4 15
FEN state: r2k1b1r/p1pnpppp/1P2q2n/8/NQ2p1b1/7N/PP3PPP/R1B2K1R b - - 4 15 ; Best move: a7b6
The current state of the chess board is: Black rook at a8, black king at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at c7, black knight at d7, black pawn at e7, black pawn at f7, black pawn at g7 and black pawn at h7. White pawn at b6, black queen at e6 and black knight at h6. White knight at a4, white queen at b4, black pawn at e4 and black bishop at g4. White knight at h3. White pawn at a2, white pawn at b2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at c1, white king at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 15. Black to move.