HOCKEY—With the weather ranging up into the 70s in Montreal, the world champion Montreal Canadiens put on their own heat wave by scorching the National Hockey-League All-Stars 6-1 in the All-Star preseason opener. Playing a fast, wide-open game, Montreal's Jean Beliveau, league's top goal scorer last season, served notice of his intention to stay on top by slamming home two goals.

HORSE RACING—In the Beldame Handicap for fillies and mares at Aqueduct, Mooring Stable's Tempted was so determined to pick up some pin money ($42,905 for the winner) she left the field behind at the clang of the gate, raced home two and a half lengths ahead of Idun, set a track record of 1:50[1/5] for 1‚⅛ mile.

At Longchamp, Aly Khan's Saint Crespin was declared winner of the $113,700 Grand Prix de L'Arc de Triomphe after the stewards first ruled the finish between Saint Crespin and Midnight Sun a dead heat. Both jockeys lodged complaints against each other, the stewards studied the official race films, upheld Saint Crespin's jockey, George Moore. Traditionally, the winner is invited to the Washington, D.C. International at Laurel, Md.

INTERNATIONAL MOTOR SPORTS—Readying himself for a try at becoming the fastest human to scoot over land, Mickey Thompson boarded his Challenger I and skimmed across the damp salt flats of western Utah in a fantastic practice run of 335 mph. Making his run over a 12-mile straightaway, he found the course both rough and slippery from previous rains, three times slipped off the narrow speed track and had to fight his sky-blue thunderbolt back. Last August Thompson set the American speed record of 330.5 mph, is now reaching for 400 mph, which would top the world record of 394.2 mph set by the late John Cobb. To do it, Thompson built Challenger I himself in the garage of his home in Los Angeles, powered it with four Pontiac engines, two driving the front axle and two driving the rear axle, giving a total horsepower of 2,000.

CHESS—Bobby Fischer, 16-year-old chess champion of the United States, scored a surprise victory over Paul Keres, Russian grand master and point leader in the current world challengers' championship at Bled and Zagreb, Yugoslavia. In the first round of the tournament Fischer beat Keres, then lost to him in the eighth. With the matches little more than half finished Fischer has worked his way up from last place to fifth among the eight contenders.