Challenges

68 challenges across eight tiers. Tier 8 is a warm-up; tier 1 will take an evening. Nothing is locked — play them in any order.

Mode

Tag

Tier 1 · Sorcerer55 points each

The Next Generationpar 47
A 3×3 patch of Conway's Game of Life. Match it when the centre cell is alive in the next generation.
match
The Whole Gridpar 215
Eighty-one cells. Match the grid only when no digit repeats in any row, any column, or any 3×3 box.
match

Tier 2 · Archmage34 points each

Bishop Checkpar 87
Extract every white bishop that is giving check along a diagonal, in board order.
extract
Clashes In The Boxpar 13
A Sudoku box, flattened. Extract every digit that appears again later in the box.
extract
Everything But Pixelspar 13
Extract every number that is not immediately followed by "px".
extract
Run Of Fivepar 74
A hand is five cards as "2H 3S 4D 5C 6H" — rank then suit, space separated, and always sorted by rank, ascending. The rank ladder is A 2 3 4 5 6 7 8 9 T J Q K: the ace is low, so A-2-3-4-5 is a run and A-T-J-Q-K is not. Match a hand whose five ranks are consecutive on that ladder.
match
Strong Enoughpar 26
Match passwords of at least 8 characters that contain at least one digit and at least one capital letter.
match
The Line Without Itpar 17
Match a line that does not contain the word "ERROR" anywhere in it.
match
Thousandspar 27
Insert commas as thousands separators: 1234567 becomes 1,234,567.
replace

Tier 3 · Warlock21 points each

Four Digits, No Morepar 21
Extract every run of 1 to 4 digits — but never a fragment of a longer number.
extract

All challenges — RegexWars