r1bq1b2/ppppk1p1/n6n/r3pp2/1PP2PP1/B1NQ3p/P2PP2P/RK3BNR b - - 8 15
FEN state: r1bq1b2/ppppk1p1/n6n/r3pp2/1PP2PP1/B1NQ3p/P2PP2P/RK3BNR b - - 8 15 ; Best move: a5a3
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black bishop at f8. Black pawn at a7, black pawn at b7, black pawn at c7, black pawn at d7, black king at e7 and black pawn at g7. Black knight at a6 and black knight at h6. Black rook at a5, black pawn at e5 and black pawn at f5. White pawn at b4, white pawn at c4, white pawn at f4 and white pawn at g4. White bishop at a3, white knight at c3, white queen at d3 and black pawn at h3. White pawn at a2, white pawn at d2, white pawn at e2 and white pawn at h2. White rook at a1, white king at b1, white bishop at f1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 8. Full move number is 15. Black to move.