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hole will go live in approximately
39 hours
. Why not try and solve it ahead of time?
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Fennel
Harbour
Hare
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Hush
Hy
Knight
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Luau
Odin
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Chess Move Validation
Christmas Trees
Collatz
Connect Four
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Nim
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Taxicab Numbers
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
Ulam Sequence
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Binary Lambda Calculus
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
Langton’s Ant
Lyndon Factorization
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Thue–Morse Constant
Turtle
Tutorial
Yellowstone Permutation
Hole
Golfer
Chars
Time
Submitted
Happy Numbers (Long)
JOrE20
28
67ms
12 Jul 2026
Happy Numbers (Long)
rkg-huwdu
28
67ms
15 May 2026
Happy Numbers (Long)
emgordon154
28
304ms
13 May 2026
Happy Numbers (Long)
vang1ong7ang
28
72ms
10 May 2026
Happy Numbers (Long)
blaztoma
28
78ms
26 Dec 2025
Happy Numbers (Long)
dokutan
82
98ms
6 Nov 2025
Happy Numbers (Long)
fuzzylojik-golf
28
63ms
9 Sep 2025
Happy Numbers (Long)
CaedenHarper
28
65ms
14 Jul 2025
Happy Numbers (Long)
edsrzf
28
64ms
9 Mar 2025
Happy Numbers (Long)
LostSyntax21
28
64ms
8 Jan 2025
Happy Numbers (Long)
pardouin
28
69ms
21 Sep 2024
Happy Numbers (Long)
Mabeloid
553
42ms
18 Sep 2024
Happy Numbers (Long)
snoozingnewt
28
64ms
1 Sep 2024
Happy Numbers (Long)
HumanoidCPU
553
41ms
9 May 2024
Happy Numbers (Long)
steffan-polygolf
87
101ms
19 Feb 2024
Happy Numbers (Long)
ovs-code
28
71ms
2 Feb 2024
Happy Numbers (Long)
orthoplex
🥉
27
622ms
1 Feb 2024
Happy Numbers (Long)
CornerMercury
28
63ms
24 Aug 2023
Happy Numbers (Long)
DialFrost
28
65ms
28 Jan 2023
Happy Numbers (Long)
Steffan153
28
65ms
12 Jan 2023
Happy Numbers (Long)
b10011
47
101ms
9 Jan 2023
Happy Numbers (Long)
AlephSquirrel
28
72ms
30 Dec 2022
Happy Numbers (Long)
retrohun
557
42ms
27 Dec 2022
Happy Numbers (Long)
primo-ppcg
🥈
25
73ms
9 Dec 2022
Happy Numbers (Long)
SirBogman
33
70ms
10 Sep 2022
Happy Numbers (Long)
clockworknazo
🥉
27
507ms
6 Sep 2022
Happy Numbers (Long)
SniperSmiley
44
90ms
24 Aug 2022
Happy Numbers (Long)
GolfingSuccess
🥉
27
475ms
16 Aug 2022
Happy Numbers (Long)
saito-ta
🥉
27
508ms
12 Aug 2022
Happy Numbers (Long)
jared-hughes
28
63ms
29 Jul 2022
Happy Numbers (Long)
Lydxn
💎
23
73ms
28 Jul 2022
Happy Numbers (Long)
sisyphus-ppcg
28
62ms
24 Jul 2022
Happy Numbers (Long)
MeWhenI
28
71ms
23 Jul 2022
Happy Numbers (Long)
KatieLG-Transpiler
553
41ms
22 Jul 2022
Happy Numbers (Long)
KatieLG
553
43ms
22 Jul 2022
Happy Numbers (Long)
Natanaelel
33
70ms
22 Jul 2022
Happy Numbers (Long)
lynn
28
70ms
22 Jul 2022
Happy Numbers (Long)
Shanethegamer
29
82ms
22 Jul 2022
Happy Numbers (Long)
sean-niemann
28
64ms
22 Jul 2022