Zen Ten MatchA Short History of the Number Match Puzzle
Long before it was an app, the number match puzzle was a pencil-and-paper game that students passed around in the back of the classroom. Nobody knows who invented it.
A game with no name
The paper version goes like this. On squared notebook paper, write the numbers from 1 to 19, leaving out 10, one digit per square and nine squares to a line:
Then cross out pairs of digits that are equal or add up to ten, as long as they are next to each other along a line or with only crossed-out squares between them. When you get stuck, copy every digit that is left onto the end of the list and keep going. The goal is to cross out everything.
Players who remember it describe it the same way: a game played on squared paper during long lessons and lectures, spread from student to student, with no rulebook and no official name. In Russian-speaking schools it was known as "Numbers", "Digits", "19" or "Seeds" (Семечки). German students called it simply "the number game" (Das Zahlenspiel).
From paper to screens
The earliest dated computer version we have found is a small Windows freeware game called "Семечки" (Seeds), listed in a Russian software catalogue in 2003 and described as the favourite game of pupils and students. In 2005 an English browser version called TenPair appeared, with the same rules. In 2011 a pair of developers released an iPhone version called Numberama, which they described as a revival of the forgotten notebook game that kept dorm rooms busy in the 1980s and 1990s.
Since then the puzzle has been released many times over, often under the name "Number Match". Many of those apps added countdown timers, coins, flashing rewards and a lot of advertising.
Why it lasts
The rules are tiny, yet the puzzle has real depth. Every match changes which other numbers can reach each other, and the decision of when to copy the remaining numbers (the Add, in today's versions) can make or break a game. It needs nothing but paper and a pencil, and it rewards patience over speed, which may be why so many people remember playing it.
Zen Ten Match
Zen Ten Match keeps the classic rules and adds a few modern touches:
- One daily board, the same for everyone in the world, tested by a solver so it can always be cleared.
- A limit of five Adds for the daily puzzle, which turns the old open-ended game into a fair daily challenge.
- Titles from Student up to Zen Master, based on how few matches you use.
- No timer, no flashing rewards, and calm music and nature photography in the background.
Read how and why we built it on the About page, or see every daily board so far on Daily Games.