The gauntlet of Interscholastic League of Honolulu basketball favors none.

That includes the state’s top-ranked team. Marcus Tobin scored 12 points and Makoto Kamata added 10, including the go-ahead bucket with less than four minutes left, as No. 4 Maryknoll stunned No. 1 Punahou 49-48 on Thursday night in a key showdown at Hemmeter Fieldhouse.

Punahou had the ball with 41.2 seconds left and worked the clock down as Maryknoll continually switched defenders against a weave-motion offense. The frantic finish included three missed shots by Punahou in the final 15 seconds. Zayne Chong, who finished with 13 points, missed a twisting 10-foot floater in traffic. The ball was tipped out to the baseline, where Cole Arceneaux missed a 15-footer. With time running out, the ball wound up batted back inbounds by Maryknoll more than 30 feet from the basket.

Arceneaux scooped the ball up and missed a deep 3 at the buzzer with Maryknoll’s Payton Grant contesting the shot, ending Punahou’s unbeaten run in league play.

“I didn’t realize the clock was expiring when Cole put up that shot,” Maryknoll coach Kelly Grant said. “The time went by real fast. The ball went in and out. Somebody could’ve tipped it back in. We’re just lucky the ball got tipped out.”

With wins over No. 2 Kamehameha and Punahou in a three-day span, Maryknoll is now tied for first place in the ILH with the Buffanblu at 5-1. It was the first loss for Punahou (21-2) since Dec. 7 against Lincoln (Calif.).

“We stick to our beliefs in playing basic basketball, taking care of the ball and playing solid defense,” Grant said.

Despite the bruising nature of the game, Maryknoll shot a scintillating 64 percent from the field (21-for-33), including 5-for-11 from the 3-point arc. The visitors were also 3-for-12 from the free-throw line. Punahou shot 42 percent from the field (19-for-45) and had a 22-17 edge on the boards, but took just three free throws all game.

Unlike their 47-42 loss to Punahou on Jan. 4, the Spartans were determined to attack the lane. Jaylen Cain was a matchup problem, helping his team stay in the game during the second quarter.

“I thought Maryknoll played really well,” Punahou coach Darren Matsuda said. “Isiah (Gelacio) and Jaylen and Tobin haven’t been playing real well the last few weeks. It’s one of those games where there are scrambles and they make you pay.”

Punahou had a 19-10 lead after Tamatoa Falatea’s wing 3 late in the first quarter. Maryknoll trailed by eight late in the second quarter when point guard Jordyn Perez came up with back-to-back steals. The first led to a wing 3 by Kamata, and Perez scored before the buzzer on the next takeaway, cutting Punahou’s lead to 31-28 at the break.

“That was huge. That gave us some momentum going into the second half, and we had that run in the third quarter,” Grant said.

Punahou will host Mid-Pacific on Saturday. Maryknoll (20-4) will entertain Saint Louis, also on Saturday.