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Hard

Hard

Puzzle

8
2
4
1
3
8
2
1
9
7
8
2
1
5
7
5
3
1
7
2
5
3
4
9
6
5
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Logic required

Singles

Hardest technique: Hidden Single

In this puzzle

Solution

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Techniques Every pattern the solver knows, explained Campaign Learn each technique in order, then prove you found it Tournament This month's leaderboard, built on the daily challenge Friends Send and accept friend requests Settings Defaults, account and contact Build your own Type in a puzzle and check it's solvable

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