Farewell, Maki Kaji.

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When you get right down to it, the puzzle world isn’t all that big. There are a few names that everyone knows, and plenty of names that people should, but generally don’t. And sadly, too many of those names aren’t celebrated until after they’re gone.

Maki Kaji is one of those names you should know.

He passed away recently, and different articles and obituaries called him everything from “puzzle enthusiast” to “Sudoku creator,” but the title he most deserves is the one he put on his business cards: Godfather of Sudoku.

Honestly, he’s one of the three most important people in the history of Sudoku.

Howard Garns is credited with creating Number Place for Dell Pencil Puzzles and Word Games in May 1979 (though a French variant of the puzzle appeared in the newspaper La France in the 1890s). Wayne Gould stumbled upon Sudoku puzzles in a magazine, then designed a generation program and sold it to the Times in London, kickstarting the craze in the UK that spread elsewhere.

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[Maki Kaji at Brazil’s first national Sudoku competition in São Paulo in 2012.]

But it was Maki Kaji who championed the puzzle all over, using it in his puzzle magazine Nikoli starting in the early 80s, then taking advantage of the UK boom and selling it in dozens of countries. (Gould didn’t have the resources, so many newspapers and publishers came to Maki Kaji for them.)

The name Sudoku came from him. (In American puzzle magazines, it was Number Place or To the Nines.) Originally the puzzle was called Suuji wa dokushin ni kagiru, or “numbers should be single,” before taking the suggestion to shorten it to Sudoku.

Of course, despite his close association with Sudoku, Maki championed puzzles in all forms. He founded Nikoli (also known as Puzzle Communication Nikoli) with two school friends in 1980, four years before adding Sudoku to its roster of puzzles. It was Japan’s first puzzle magazine!

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One of the goals of Nikoli was to feature what they called “culture independent” puzzles, meaning puzzles that didn’t rely on a specific language or alphabet. (Talk about accessibility!)

“When we create our puzzles, we want people to enjoy them and not feel stressed by them,” he said.

Because of this culture-independent style, Nikoli was famed for its many logic puzzles, because they relied less on words and more on numbers, symbols, and elegant grid positioning. Popular puzzles included familiar ones like Sudoku and Kakuro, as well as less familiar puzzles like Nurikabe and Hashiwokakero.

nikoli puzzles

“I don’t want to just be the godfather of Sudoku,” Maki said. “I’d like to spread the fun of puzzles until I’m known as the person who established the puzzle genre in Japan.”

One of his key tools was a section in Nikoli that invited readers to submit their own ideas for puzzles. It quickly became the most popular part of the magazine. Readers submitted new puzzles, which other readers then refined and expanded on. Nikoli is credited with introducing hundreds of new logic and number puzzles to the world through this puzzle-loving fan-fueled pipeline.

Of course, even the Godfather of Sudoku ventured into crosswords from time to time. In fact, in 2017, it was reported that he published the world’s largest ever crossword, with 59,365 across clues and 59,381 down clues on a printed grid 30m long, kept in a scroll.

Go big or go home, I guess.

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[Constructor Peter Gordon (and his Sudoku license plate) with Maki.

Maki stepped down as president of Nikoli just last month, and the company released this statement in response to his passing:

Kaji-san came up with the name Sudoku and was loved by puzzle fans from all over the world. We are grateful from the bottom of our hearts for the patronage you have shown throughout his life.

But, naturally, it takes a puzzler to truly honor a puzzler, and I think Thomas Snyder (aka Dr. Sudoku, no slouch himself when it comes to the famed number puzzle) offered the perfect tribute on his Art of Puzzles website:

A wordoku puzzle dedicated to Maki Kaji.

snyder wordoku

The puzzle world is a far richer and more varied place thanks to the creativity, hard work, and passion of Maki Kaji. You probably didn’t know his name before. But hopefully, you’ll remember it now.

Farewell, Maki. Thank you for bringing so many new eyes to the world of puzzles.

[Source links: Kotaku, The Guardian, Wikipedia.]


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The Tetris Effect: Unleashed!

When alarmists talk about the negative effects of video games on players, they’re usually referring to first-person shooters, like Call of Duty, or games that encourage immoral acts, like Grand Theft Auto.

They’re not usually talking about Tetris.

But as it turns out, playing Tetris can have curious side effects. Some folks who play for prolonged periods of time report seeing the iconic tetromino shapes falling as they drift off to sleep, or when they close their eyes. (This has also been reported by jigsaw puzzle solvers, who see curved lines, and Rubik’s Cube solvers, who continue to see the constantly shifting colors of the cube.)

There are additional anecdotal stories of people viewing the world in a Tetris-y way after solving, fixating on how shapes could fit together.

It’s common enough, in fact, that it has its own term: The Tetris Effect.

It has also inspired a Tetris game of the same name, which is releasing later this year for the Playstation 4. Tetris Effect enhances the Tetris experience by tying musical themes and imagery to the traditional gameplay.

One player describes the play experience in an article for Kotaku:

I played the game in VR, though that is optional. The first time I landed a Tetris, the screen exploded in a beautiful display of particle effects, sea life swam around me, the controller vibrated and the music swelled in a way that sent chills down my spine — I’ve done this a million times before but not like this.

[Image courtesy of Eurogamer.]

The game also boasts a new solving trick — the Zone mechanic — which allows you to stop time and place several blocks at one time, meaning you could line up multiple pieces to drop at once and clear more lines. The previous limit was four lines, but now, with the Zone mechanic, it’s possible to clear out up to sixteen lines at once! (Naturally, there’s a term for that as well. It’s a decahexatris.)

This is an excitingly immersive evolution of the classic puzzle game, and I can’t wait to check it out.


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