BOSTON — An extra day of waiting, a drive into the heart of Boston and a raucous opposing crowd just inches away from the court in Boston Latin’s cramped, tiny gym could do nothing to derail Andover on Sunday.

“Survive and advance,” said Golden Warriors point guard Emmett Kim. “That’s been our motto all season. We always believe that we can win, and our goal is to survive and keep playing.”

Stephen Shaw erupted for 12 first-half points to give No. 12 Andover a halftime lead it would never surrender, and Kyle Rocker scored 20 of his team-high 26 in the second half to sent the Golden Warriors to a 67-53 win over No. 4 Boston Latin in the Division 1 North quarterfinals.

Originally scheduled for Saturday, the game was postponed a day due to a forecast of snow that never arrived.

“This is awesome,” said Shaw. “We’re excited to get the win and move on. Whatever comes next, we’ll be ready for it. We’re very confident right now.”

Andover (14-8) was scheduled to take on top-seeded Lynn English (19-2) in the Division 1 North semifinals on Wednesday (7 p.m.) at St. John’s Prep.

 “This is amazing,” said senior Colin Kirkpatrick. “It was an exciting win. But we’re onto the next one. We’re very pumped for Lynn English.”

Boston Latin started hot, scoring the first three baskets of the game.

But Shaw responded with back-to-back jumpers and, after a Kim corner 3-pointer, Shaw capped a 10-point Andover run with a 3-pointer from the top of the key.

“I was feeling really good,” said Shaw. “We heard the rims here were really stiff, but it didn’t matter. Warm-ups felt good, and I felt ready.”

Latin responded with a 14-2 run of its own. But Shaw snapped that with an elbow 3-pointer, and a deep Rocker trey with less than a minute to go in the half gave Andover the lead for good.

Shaw opened the third period with his third 3-pointer, then followed that with a jumper and a layup to give the Warriors a 32-28 advantage. Rocker followed that with 3s from the elbow and the top of the key, giving him six for the game.

“We felt like we could go on a run to start the third,” said Kim, who finished with seven points and made four steals. “And our runs had to be longer than their runs. We were flying, running and just going. Rocker, Shaw, they were shooting great and we were rolling.”

Latin cut the lead to just 58-50 with 2:07 left. But Aidan Cammann hit a pair of free throws and Kirkpatrick knocked down a jumper to give Andover back control. The Warriors were 7 of 8 from the free throw line down the stretch and locked down the win.

“I’m proud of the team and so proud of (Kim, Shaw and Kirkpatrick),” said Andover head coach Dave Fazio. “They’ve been with me for four years and they’re total character kids. You can count on them for everything on and off the court and they’re playing big. And the whole team is getting confidence and we’re finding a way.”

Warriors top Waltham

Emmett Kim was the star with 21 points including a pair of 3-pointer as No. 12 Andover beat No. 5 Waltham, 47-39, in the first round of the Division 1 North tournament last Tuesday. Kyle Rocker added 15 points for the winners.

Andover 67, Boston Latin 53

Division 1 North quarterfinals

Andover (67): Stephen Shaw 7 2-2 19, Kyle Rocker 8 4-7 26, Emmett Kim 2 2-2 7, Aidan Cammann 2 4-4 8, Colin Kirkpatrick 2 2-2 7, Charlie McCarthy 0 0-2 0, Shamus Florio 0 0-0 0, Rishi Srinivasan 0 0-0 0, Ryan Grecco 0 0-0 0, John Marshall 0 0-0 0, Michael Slayton 0 0-0 0. Totals 21 14-19

3-pointers: A — Shaw 3, Rocker 6, Kim, Kirkpatrick

Andover (14-8): 10 15 23 19 — 67

Boston Latin (15-7):  9 15 12 17 — 53

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