rn1q1b1r/p2pp1p1/5k2/P1p3Np/1p3p1P/R1PP4/1P1P1PP1/1NB1KBR1 w - - 0 15
FEN state: rn1q1b1r/p2pp1p1/5k2/P1p3Np/1p3p1P/R1PP4/1P1P1PP1/1NB1KBR1 w - - 0 15 ; Best move: a3a4
The current state of the chess board is: Black rook at a8, black knight at b8, black queen at d8, black bishop at f8 and black rook at h8. Black pawn at a7, black pawn at d7, black pawn at e7 and black pawn at g7. Black king at f6. White pawn at a5, black pawn at c5, white knight at g5 and black pawn at h5. Black pawn at b4, black pawn at f4 and white pawn at h4. White rook at a3, white pawn at c3 and white pawn at d3. White pawn at b2, white pawn at d2, white pawn at f2 and white pawn at g2. White knight at b1, white bishop at c1, white king at e1, white bishop at f1 and white rook at g1. Both players have exhausted their castles. Half move number is 0. Full move number is 15. White to move.