Solve Sudoku.
Take a cut of the pot.
SudoRush runs seasons with a prize pool that is funded before anyone plays. Earn season points from the limited puzzle pool and from a competition that opens every 3 hours. When the season ends, the pool is split between competitors in proportion to the points they earned.
Free to enter. No entry fee, no deposit, no wager, nothing to buy. 18+.
Two ways to score, one way to practise
Season points come from two places. Everything else on the site is for getting better at it.
Season puzzles
60 minutes apartA fixed catalogue of 120 puzzles for the whole season, and no more will be made. Take one, and it is yours alone for an hour — nobody else can even see it. Worth 10 to 25 points depending on difficulty.
The competition
Every 3 hoursThree puzzles — Easy, Medium, Hard — the same for everyone, open to everyone at once. Worth 1, 2 and 3 points, each scored on its own. Solve one, two or all three.
Practice
Whenever you likeUnlimited puzzles, unlimited mistakes, unlimited hints, no points. It costs you nothing and it never touches your cooldown.
Built so the maths is checkable
A prize product only works if players believe the numbers. Here is what that belief rests on.
Your share is arithmetic, not discretion
At the end of a season the pool is divided between competitors in proportion to the points they earned. Your points over everyone's points, times the pool. That is the whole formula, and it is on the site before you play.
One puzzle, one player
A season puzzle is reserved to you for an hour by a single conditional write in the database. Two people cannot both win the race for it, however close the timing.
Exactly one solution, proved
Every puzzle is generated fresh for its season and machine-verified to have a single solution before it appears. No ambiguity, no disputed answers.
Answers stay on the server
The solution is never sent to your browser. Every digit you type is checked by us — which is also how mistakes are counted honestly.
The same limits for everybody
Two free hints and three mistakes on every competitive puzzle. They cannot be bought, earned, extended, or refilled by watching an advertisement. Not by anyone.
Bots get caught
Solving patterns are scored for the things people do and scripts do not. Suspicious runs are held and reviewed by a person before anything is paid.
What each difficulty is worth
Difficulty is not guessed from the number of givens — every puzzle is solved by a technique-aware rater before it goes on the board. Season 1's values are below; a future season can price them differently.
| Tier | Typically | Techniques needed | Season puzzle | Competition |
|---|---|---|---|---|
| Easy | 42 givens | Singles only | 10 | 1 |
| Medium | 34 givens | Locked candidates, naked pairs | 15 | 2 |
| Hard | 29 givens | Hidden pairs, triples, X-wing | 20 | 3 |
| Very Hard | 24 givens | Chains and beyond | 25 | — |
Season 1 is 300 Easy, 300 Medium, 300 Hard and 100 Very Hard — 1,000 puzzles carrying 16,000 points in total. The most a single competition round can pay is 6 points.
The board is open right now
120 season puzzles are unreserved, and a competition round is open to everyone.