rnb2rk1/1ppq1pbp/B2pp3/5np1/4PPP1/PP3N2/R1PPK2P/1NBQ3R w - - 6 10
FEN state: rnb2rk1/1ppq1pbp/B2pp3/5np1/4PPP1/PP3N2/R1PPK2P/1NBQ3R w - - 6 10 ; Best move: a6d3
The current state of the chess board is: Black rook at a8, black knight at b8, black bishop at c8, black rook at f8 and black king at g8. Black pawn at b7, black pawn at c7, black queen at d7, black pawn at f7, black bishop at g7 and black pawn at h7. White bishop at a6, black pawn at d6 and black pawn at e6. Black knight at f5 and black pawn at g5. White pawn at e4, white pawn at f4 and white pawn at g4. White pawn at a3, white pawn at b3 and white knight at f3. White rook at a2, white pawn at c2, white pawn at d2, white king at e2 and white pawn at h2. White knight at b1, white bishop at c1, white queen at d1 and white rook at h1. Both players have exhausted their castles. Half move number is 6. Full move number is 10. White to move.