On White's 47th move, if he were not forced to move - he would have been OK and could have held the draw.
But - none of his five pawns could move.
The knight was pinned and could not move.
The bishop could not move without material loss.
The Queen was trapped in the corner and its only possible move would have resulted in capture by a pawn,
The King had three possible moves, but only one could protect the knight against capture - unfortunately, that move blocked the bishop's protection of his f pawn and also led to material loss.
But - none of his five pawns could move.
The knight was pinned and could not move.
The bishop could not move without material loss.
The Queen was trapped in the corner and its only possible move would have resulted in capture by a pawn,
The King had three possible moves, but only one could protect the knight against capture - unfortunately, that move blocked the bishop's protection of his f pawn and also led to material loss.