“I know we’re used to rushing, but this is a mind game. So we want to slow down and think,” Shaheed said. “Don’t move off of impulse.”

It’s a message that extends far beyond the chess board.

Organizers of Boston’s new Chess for Peace program are using one of history’s oldest board games to teach kids important life skills, including strategic thinking and conflict resolution. Their goals are to reduce youth violence and address the negative impacts of technology.

The program offers free chess classes Sunday afternoons in the basement of the Madison Park High School gym in Roxbury. It’s affiliated with a Boston Public Schools initiative that also includes basketball, boxing, yoga, rugby, and more, an effort to support families and keep students engaged throughout the week.

The 6-WON-7 program, which has grown significantly over the past couple years, is about to mark its 100th Sunday, said Cory McCarthy, director of student support at Boston Public Schools. School administrators launched the program partly in response to reports about unruly teenagers causing chaos at the South Bay shopping center and elsewhere on weekends, McCarthy said.

“School should feel like a community,” he said. “It’s the forgotten piece in the academic journey. It’s a safety issue. It’s violence prevention, it’s youth development, it’s all part of student wellness.”

While violent crime has decreased overall, youth violence remains a concern in Boston, largely concentrated among small groups of teenagers and sometimes fueled by gang affiliations. Social media often plays a role, experts say, with kids posting threats or bragging about crimes they’ve committed.

As technology shortens our attention spans, encourages rash decision-making and limits in-person interactions, playing chess can be a robust kind of antidote, said Renee Callender, a retired Boston police detective who spearheaded the program.

“It’s more than just a game. It actually mirrors life,” she said. “In the game of chess, like life, every action comes with consequences.”

During more than three decades on the police force, Callender saw firsthand how cycles of violence start and end. She also founded a nonprofit called Promoting Conflict Resolution, Inc.

She said the idea for the program came from watching a youth chess tournament on TV; she was impressed by how poised and attentive the players looked. Maybe this could help kids in Boston stay out of trouble, she thought.

“It’s not only about how to play but how to lose,” she said. “How to gracefully lose. How to be humble.”

Indeed, it’s all fun and games until your king is in check.

Jacquami eventually lost to his opponent, 7-year-old Filip Rancic, who said his winning strategy involved steadily advancing his pieces toward the middle of the board.

“Sometimes he wins, sometimes he loses. So that’s good for him,” said Filip’s dad, Milan Rancic.

“They need to learn to be patient enough to develop a strategy, and obviously avoid a tantrum when they lose — pretty much everything we want our kids to learn,” he added.

During the class, three sets of players sat across from each other at classroom desks, with Shaheed monitoring their games and offering instruction. Sometimes the clink of plastic chess pieces was the only sound in the room.

“I think I got checkmate,” exclaimed Henry Lee, 10, bouncing excitedly in his chair.

Shaheed inspected the board and confirmed — checkmate, indeed.

“Good game,” Lee said, reaching out to shake hands with his opponent, 11-year-old Jesus Beltran.

“Can you believe you just lost to a 10-year-old?” he asked, grinning.

Beltran laughed, rolled his eyes and started setting up the board again; he had won the previous match. In addition to chess, the boys play soccer together. They agreed their friendship can easily withstand some light-hearted competition.

A few turns into the next game, Lee made a move he instantly regretted.

“Can I have that turn back?” he asked Beltran, who smiled and shook his head no.

“So often, they’re focused on just one piece,” said Rhodes Pierre, another instructor with the program. “I tell them to examine the entire board.”

Pierre, who grew up in Mattapan, has experienced firsthand the impacts of violence. His older brother was shot and killed in 1994 near their childhood home, about two weeks after he inadvertently witnessed another daytime shooting nearby. The case was later linked to a neighborhood drug gang, according to news reports at the time.

Pierre said he started playing chess in college and quickly came to appreciate the life skills it teaches.

“Giving people another outlet to express themselves without having to revert to violence, that’s a good thing,” he said. “Making people sit down and think. It’s a better avenue than what we have right now.”

While sprinkling in the basics of chess strategy, Shaheed sends a similar message.

“It’s about seeing the moves behind the moves,” he told the class. “It takes paying attention, hearing your own self think. Most games are won or lost because of focus.”

It’s something he personally learned the hard way, Shaheed said.

Now 45, he spent much of his youth caught in a cycle of poverty, crime, incarceration, and mental illness. From foster care and psychiatric institutions to jails and prison, he ended up playing a lot of chess.

The game took on a central role in his life, an overarching metaphor that changed the way he approached decision-making, Shaheed said. Especially when he found himself in a hostile environment, he would think about the moves available to him and their potential consequences. That finally helped him leave the streets behind and forge a new path.

“The easy money, it wasn’t working. It was almost like a setup — nothing made sense anymore,” he said. “I needed a better move.”

He still plays chess regularly with various partners he’s befriended around Boston. He said he hopes younger generations will find some of the same benefits he’s experienced.

“Chess is a game of distress, tribulations, defeat, obstacles, resistance, competition, sorrow, and conquest,” Shaheed wrote in his recently published book, “Games Over: The Real Story About Chess and Life.”

“And that’s what life is all about — overcoming barriers and making progress.”

Lea Skene can be reached at lea.skene@globe.com. Follow her on X @lea_skene.