rn3r2/p1pqkp1p/3p3n/1p1P1bp1/1PPKp3/b3B2N/QN2PPPP/R4B1R b - - 6 15
FEN state: rn3r2/p1pqkp1p/3p3n/1p1P1bp1/1PPKp3/b3B2N/QN2PPPP/R4B1R b - - 6 15 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black knight at b8 and black rook at f8. Black pawn at a7, black pawn at c7, black queen at d7, black king at e7, black pawn at f7 and black pawn at h7. Black pawn at d6 and black knight at h6. Black pawn at b5, white pawn at d5, black bishop at f5 and black pawn at g5. White pawn at b4, white pawn at c4, white king at d4 and black pawn at e4. Black bishop at a3, white bishop at e3 and white knight at h3. White queen at a2, white knight at b2, white pawn at e2, white pawn at f2, white pawn at g2 and white pawn at h2. White rook at a1, white bishop at f1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 15. Black to move.