The greatest "non-master" game

This game was played in 1974 at the San Francisco chess tournament.There was a brilliancy in the list of prizes,and this prize was won,by a mere 1500 player!!!!!One would expect the GMs like Walter Browne to win it,but no!!You HAVE TO look at this game

This game is also in the book ANTOLOGY OF CHESS(yeah,they spelt anthology wrong)