r1bq3r/1ppBb1p1/p3pn2/3p2kp/1n1P1p2/PP2PP1P/R1PK4/1NBQ2NR w - - 4 16
FEN state: r1bq3r/1ppBb1p1/p3pn2/3p2kp/1n1P1p2/PP2PP1P/R1PK4/1NBQ2NR w - - 4 16 ; Best move: a3b4
The current state of the chess board is: Black rook at a8, black bishop at c8, black queen at d8 and black rook at h8. Black pawn at b7, black pawn at c7, white bishop at d7, black bishop at e7 and black pawn at g7. Black pawn at a6, black pawn at e6 and black knight at f6. Black pawn at d5, black king at g5 and black pawn at h5. Black knight at b4, white pawn at d4 and black pawn at f4. White pawn at a3, white pawn at b3, white pawn at e3, white pawn at f3 and white pawn at h3. White rook at a2, white pawn at c2 and white king at d2. White knight at b1, white bishop at c1, white queen at d1, white knight at g1 and white rook at h1. Both players have exhausted their castles. Half move number is 4. Full move number is 16. White to move.