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ActivePrompting · Hosted by Renbu

Sudoku 101

The first-ever competition on Renbu

SudokuPuzzle
Prize pool
$0
Participants
6 / 50
Seats taken
Submissions
13
Deadline
Nov 15, 2026
14 days left

Live leaderboard

Each participant's best score on the public test set. The final ranking uses a separate private test set after the end.

Why a public and a private test set?

The live leaderboard scores every submission on the public test set, so you can see where you stand as you go. Because those scores come back after every submission, it's possible to tune a prompt to those particular items rather than to the task itself, and climb the live board without getting better at it.

The private test set is hidden from everyone and much larger. After the end, each participant's best submission is scored on it once, and that decides the final ranking and prizes. A prompt that really works does about as well on both; one fitted to the public items usually drops. Expect some places to change.

Ranked by score (higher first), then cell accuracy (higher first), then total tokens (fewer first), then the earlier submission. Time is shown but doesn't rank, since it depends on how busy the model provider is. Sorting by a column changes the order shown, not the ranks.

#ParticipantScore
5
@hayashi_yasuUniversity of Michigan

50.1% cell accuracy · 4,117,713 tokens · 30m 41s · 1 submission, last Oct 31

51.1%
45 / 88
4
@shuchi

61.8% cell accuracy · 5,144,476 tokens · 37m 13s · 2 submissions, last Nov 2

70.5%
62 / 88
3
@cheng_linRenbu

62.8% cell accuracy · 5,233,965 tokens · 37m 46s · 2 submissions, last Nov 2

70.5%
62 / 88
2
@celery

64.3% cell accuracy · 4,862,415 tokens · 42m 0s · 5 submissions, last Nov 2

72.7%
64 / 88
1
@ken

63.7% cell accuracy · 5,070,117 tokens · 37m 20s · 3 submissions, last Oct 31

73.9%
65 / 88

Score: Solve rate: puzzles solved ÷ all puzzles. A puzzle the model gave no readable grid for counts as not solved. Cell accuracy: empty cells filled correctly ÷ all empty cells, over every puzzle. Tokens cover every item of the submission that counts. Time is how long scoring it took, start to finish, with several items answered at once; it's shown, not ranked.

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