Ophex
Rate itCombine seven numbers on a hex grid into the day's target.
on andrewt.net
Ophex is a daily arithmetic puzzle by Andrew Taylor. Seven numbers sit on a hexagonal grid with operators between them, and tapping an operator combines its two neighbours. The goal is to merge all seven into one number that equals the day's target, even if fractions or negatives appear along the way.
About Ophex
Ophex arranges seven numbers in a hexagon, one in the centre and six around it, with +, -, x and / operators placed between neighbouring numbers. You tap an operator to apply it to the two numbers it sits between, and the result takes their place; where order matters, the game asks which way round. Step by step you merge all seven numbers into one, and the puzzle is solved when that last number equals the target.
Intermediate results can be fractions or negative numbers, shown as improper fractions, mixed numbers or decimals as you prefer, but the target is always a whole number. There is usually more than one route to it. Undo, redo and restart are available, and the share text counts how many undos you used.
A new numbered puzzle appears every day at midnight UTC (number 552 on 29 October 2026), the same for everyone. The menu tracks your current and best streak and lets you pick any earlier puzzle back to the first. Progress can be moved to another device with a link or QR code, and nothing needs an account. Ophex is by Andrew Taylor, whose other puzzles include 3Doku, Cell Tower, Celtix and Ronin.
It suits players who like Countdown-style arithmetic but want a spatial twist, since which numbers are neighbours matters as much as the sums.
How to play Ophex
- Open Ophex and note the target for today's puzzle.
- Tap an operator between two neighbouring numbers to combine them.
- Choose the order when asked, for subtraction and division.
- Keep combining until only one number is left.
- Make that number equal the target, then share your result.
Screenshots
Tips
- Plan the last step first: which two numbers could make the target?
- Division can leave fractions that cancel out later, so do not fear them.
- Combine the centre number early or late depending on which operators surround it.
- Use undo freely, but fewer undos look better in your shared result.
Questions
Is Ophex the same for everyone?
Yes. Puzzles are numbered by days since launch, and everyone plays the same one.
Can intermediate results be fractions?
Yes, and negatives too, but the target is always a whole number.
Who makes Ophex?
Andrew Taylor, who also makes 3Doku, Cell Tower and Celtix.
When does a new Ophex puzzle appear?
At midnight UTC. After you finish, the game counts down to the next one, and the menu lets you play any earlier puzzle.
Ratings and reviews
No ratings yet. Be the first to rate Ophex.
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