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Urjo.com logical thinking challenges
2166Anon2390LFY23/311732Anon1⍉1803Anon2314MAH14/321874Anon1848Anon15/341629Anon29/35/1⍉1520Anon1937FOX1809Anon1⍉1601Anon1797LSC2⍉1708NNN22/45/1⍉1771Anon1⍉2304DAR15/311824Anon0/342025DGL26/322009Anon26/611650Anon1660Anon1608Anon6/131877Anon1⍉1805Anon26/342066Anon1⍉1565Anon3⍉1809Anon27/351722Anon16/281645Anon0/131797Anon2077Anon12/311690Anon5⍉1841MIL1⍉1802SME3⍉1762Anon1⍉1964FOX10/331757Anon0/302182Anon27/332149Anon21/331921LKH10/311545Anon1/13/1⍉1781LSC2/331673Anon1/191887Anon1⍉1548Anon1/121815Anon4/311828ADU27/291841Anon9/622074Anon10/321829RNY50/52/2⍉
Correct
Each line has 2 red and 2 blue spots
Incorrect
There are lines with 3 red and 1 blue spots
3
Correct
Red number 3 has exactly 3 red spots around it
3
Incorrect
Blue number 3 has 4 blue spots around it
Correct
Adjacent lines are different
Incorrect
There are identical lines next to each other
Urjo.com is a logical challenge where you determine which spots are red and which are blue.
- Each line must contain an equal number of red and blue spots.
- Numbers indicate how many surrounding spots are the same color as the numbered spot.
- Adjacent lines must be different.
Tutorial Learn the rules step by step.
Hint: Tap and swipe upward or downward to select a specific color.
Set up profile to track progress, set your flag and initials, choose your preferred difficulty level, and get your initials on the Top list.
- 2026-01-01 New Compare screen user interface.
- 2025-12-26 CCL completed the 1,000,000th ranked solve with no mistakes.
- 2025-12-12 Tap on a display name to view detailed profile statistics like average mistakes per challenge, or perfect solve percentage.
- 2025-11-20 Join the Urjo.com Discord: https://discord.gg/t6JATXqUQm Discuss new ideas, explore new challenges, compare results, and share solving strategies.
- 2025-11-05 Compare your solves against other Urjo.com solvers.
- 2025-10-23 Tap a solve on the completion screen to watch Urjo.com solvers solving challenges live.
- 2025-08-21 Pair Urjo.com solvers against each other. Solvers are compared based on number of mistakes and the time it took.
- 2025-08-05 Added challenge and solver ratings. After you complete a challenge your rating will adjust based on how difficult the challenge was. Get your initials and flag shown on the Top list.
- 2025-05-23 Added engine to review Urjo.com challenge solves in great depth. See where you made a mistake, or had to make a lucky guess.
- 2025-05-08 New update. Compete with other Urjo.com solvers. Sign in with email to keep track of solved challenges both on desktop and on mobile.
- 2025-04-21 1,000,000 solved Urjo.com challenges. 🎉
- 2018-06-14 New update. Compare your solving times with others on a histogram.
- 2017-08-15 0:32:26 WR IL Speedrun || Urjo - 8x8 - 1 Difficulty
- 2017-08-15 0:14.07 Former WR IL Speedrun || Urjo - 6x6 - 1 Difficulty
- 2017-08-14 0:57.70 WR Speedrun || Urjo - 4x4 1-5 Run
- 2016-05-27 Piritta @MPMP1974 on x.com
- 2016-02-19 First version. Solve Urjo.com challenges with various difficulty levels.