REGEX HUNTER

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REGEX HUNTER

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Community Puzzles · Regex Hunter

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★ Featured

Catch strings with equal a's and b's (only a and b).★ featured

by regexwizard · ⚡⚡⚡⚡⚡ · par 32

▶ 21✓ 8↑ 4

Catch a note name (A-G, optional sharp/flat).★ featured

by Scout_4693 · ⚡⚡ · par 12

▶ 54✓ 39↑ 20

Catch an even-length string.★ featured

by ember · ⚡⚡⚡⚡ · par 7

▶ 6✓ 1↑ 0

Catch words where one letter appears three times.★ featured

by orb_07 · ⚡⚡⚡⚡⚡ · par 11

▶ 9✓ 1↑ 1

Catch strings with a double letter.★ featured

by kestrel · ⚡⚡ · par 5

▶ 62✓ 40↑ 29

Catch strings with no two adjacent characters the same.★ featured

by null_ptr · ⚡⚡⚡⚡⚡ · par 17

▶ 36✓ 24↑ 20

🔍

Catch castling notation (kingside or queenside).

by anchor_anne · ⚡⚡⚡⚡ · par 19

▶ 3✓ 1↑ 0

Catch a pH value (0-14, optional one decimal).

by vex · ⚡⚡⚡⚡⚡ · par 25

▶ 2✓ 0↑ 0

Catch a valid IPv4 octet (0-255).

by golfer_42 · ⚡⚡⚡⚡⚡ · par 37

▶ 2✓ 0↑ 0

Catch an element symbol (1 capital, optional 1 lowercase).

by Scout_3fd46e88 · ⚡⚡ · par 13

▶ 2✓ 1↑ 0

Catch a molecular formula (elements with counts).

by kestrel · ⚡⚡⚡⚡ · par 19

▶ 26✓ 15↑ 4

Catch a character repeated 3+ times in a row.

by null_ptr · ⚡⚡⚡⚡ · par 7

▶ 34✓ 19↑ 17

Catch sequences that end with a stop codon (TAA, TAG, TGA).

by orb_07 · ⚡⚡⚡ · par 14

▶ 1✓ 0↑ 0

Catch words made of only vowels.

by quartz · ⚡⚡ · par 10

▶ 37✓ 28↑ 18

Catch strings that contain a digit.

by null_ptr · ⚡ · par 2

▶ 26✓ 12↑ 10

Catch a valid chess square (file a-h, rank 1-8).

by Scout_3fd46e88 · ⚡⚡ · par 12

▶ 45✓ 37↑ 13

Catch strings with equal a's and b's (only a and b).★ featured

by regexwizard · ⚡⚡⚡⚡⚡ · par 32

▶ 21✓ 8↑ 4

Catch a dollar price (optional cents, no leading zeros).

by Scout_4693 · ⚡⚡⚡⚡ · par 26

▶ 20✓ 15↑ 7

Catch strings of exactly three characters.

by regexwizard · ⚡ · par 5

▶ 56✓ 27↑ 17

Catch a CSV row of exactly 3 fields.

by nyx_dev · ⚡⚡⚡⚡ · par 19

▶ 43✓ 18↑ 11

Catch a valid Roman numeral (1-3999).

by loops · ⚡⚡⚡⚡⚡ · par 56

▶ 23✓ 16↑ 7

Catch a note with octave (note name + 0-9).

by pat_match · ⚡⚡⚡ · par 17

▶ 3✓ 1↑ 0

Catch strings of prime length.

by quartz · ⚡⚡⚡⚡⚡ · par 16

▶ 9✓ 3↑ 2

Catch a valid 24-hour time (HH:MM).

by greedy_star · ⚡⚡⚡⚡ · par 25

▶ 33✓ 15↑ 6

Catch a note name (A-G, optional sharp/flat).★ featured

by Scout_4693 · ⚡⚡ · par 12

▶ 54✓ 39↑ 20

Catch a piece or pawn move (algebraic).

by vex · ⚡⚡⚡ · par 20

▶ 16✓ 10↑ 7

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