Archive

Every puzzle ever shipped, across all 9 games. Search the title or explanation, or narrow by game, difficulty, or tag.

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918 puzzles in the archive

✓
Accepted Answer

#102 · 2026-07-15 · copy, reference
⛳
Code Golf

#102 · 2026-07-15 · math, recursion
P
Dependency Detective

#102 · 2026-07-15 · rust, http, async
?
Guess the Output

#102 · 2026-07-15 · coercion, arrays
/
Regex Roulette

#102 · 2026-07-15 · alternation, optional
!
Spot the Bug

#102 · 2026-07-15 · mutable-default
O
Time Complexity

#102 · 2026-07-15 · string-concatenation, hidden-cost
T
Type Signature

#102 · 2026-07-15 · void, undefined, return-type
«»
Which Language?

#102 · 2026-07-15 · sql, group-by
✓
Accepted Answer

#101 · 2026-07-14 · event-loop, macrotask
⛳
Code Golf

#101 · 2026-07-14 · arrays, set
P
Dependency Detective

#101 · 2026-07-14 · rust, cli, popular
?
Guess the Output

#101 · 2026-07-14 · identity, small-int-cache
/
Regex Roulette

#101 · 2026-07-14 · word-boundary
!
Spot the Bug

#101 · 2026-07-14 · async, await
O
Time Complexity

#101 · 2026-07-14 · power-set, exponential, combinatorics
T
Type Signature

#101 · 2026-07-14 · narrowing, typeof, union
«»
Which Language?

#101 · 2026-07-14 · elixir, pipe, capture
✓
Accepted Answer

#100 · 2026-07-13 · strings, slicing
⛳
Code Golf

#100 · 2026-07-13 · arrays, flatten
P
Dependency Detective

#100 · 2026-07-13 · rust, parallelism, performance
?
Guess the Output

#100 · 2026-07-13 · coercion, plus-operator
/
Regex Roulette

#100 · 2026-07-13 · phone, format
!
Spot the Bug

#100 · 2026-07-13 · comparison, assignment
O
Time Complexity

#100 · 2026-07-13 · bubble-sort, quadratic
T
Type Signature

#100 · 2026-07-13 · destructuring, rest, tuple
«»
Which Language?

#100 · 2026-07-13 · php, echo, concatenation
✓
Accepted Answer

#99 · 2026-07-12 · undefined, typeof
⛳
Code Golf

#99 · 2026-07-12 · strings, regex
P
Dependency Detective

#99 · 2026-07-12 · html, scraping, jquery