rnb1q1r1/3pbk2/pPp1pn2/6p1/1P1PPpp1/5P2/N1P1B2P/R1BQ1KNR b - - 2 15
FEN state: rnb1q1r1/3pbk2/pPp1pn2/6p1/1P1PPpp1/5P2/N1P1B2P/R1BQ1KNR b - - 2 15 ; Best move: a6a5
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black queen at e8 and black rook at g8. Black pawn at d7, black bishop at e7 and black king at f7. Black pawn at a6, white pawn at b6, black pawn at c6, black pawn at e6 and black knight at f6. Black pawn at g5. White pawn at b4, white pawn at d4, white pawn at e4, black pawn at f4 and black pawn at g4. White pawn at f3. White knight at a2, white pawn at c2, white bishop at e2 and white pawn at h2. White rook at a1, white bishop at c1, white queen at d1, white king at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 2. Full move number is 15. Black to move.