The
Snake
hole will go live in approximately
2 hours
. Why not try and solve it ahead of time?
Recent Solutions
Achievements
Cheevos
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
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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
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
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><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
iogii
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
ZuzuScript
Hole
All
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
Bytes
Time
Submitted
12 Days of Christmas
JOrE20
2,539
255ms
7 hours ago
Fibonacci
michelebastione
85
257ms
22 hours ago
Snake
madex
301
249ms
3 days ago
Pernicious Numbers
snoozingnewt
86
259ms
4 days ago
Leap Years
michelebastione
99
273ms
9 days ago
Ellipse Perimeters
michelebastione
258
251ms
9 days ago
12 Days of Christmas
InDey
770
286ms
13 days ago
Tutorial
JOrE20
139
551ms
13 days ago
Quine
LostSyntax21
194
436ms
28 Aug 2026
Thue–Morse Constant
HumanoidCPU
1,056
445ms
24 Aug 2026
Tutorial
quasar098
272
637ms
20 Aug 2026
Hexagonal Spiral
bitsandbeyond
397
314ms
14 Aug 2026
Yellowstone Permutation
HumanoidCPU
4,064
360ms
8 Aug 2026
Ulam Sequence
madex
149
364ms
31 Jul 2026
Ulam Sequence
dokutan
888
408ms
31 Jul 2026
Divisors
ovs-code
108
367ms
8 Jul 2026
Divisors
GolfingSuccess
108
344ms
8 Jul 2026
Sphenic Numbers
GolfingSuccess
132
518ms
2 Jul 2026
√2
dokutan
907
358ms
27 Jun 2026
φ
dokutan
908
370ms
27 Jun 2026
τ
dokutan
907
357ms
27 Jun 2026
π
dokutan
902
362ms
27 Jun 2026
λ
dokutan
906
372ms
27 Jun 2026
γ
dokutan
906
363ms
27 Jun 2026
Van Eck Sequence
dokutan
1,518
361ms
27 Jun 2026
Vampire Numbers
dokutan
883
385ms
27 Jun 2026
Trinomial Triangle
dokutan
1,366
381ms
27 Jun 2026
Tower of Hanoi
dokutan
370
343ms
27 Jun 2026
Taxicab Numbers
dokutan
2,955
367ms
27 Jun 2026
Smith Numbers
dokutan
1,374
379ms
27 Jun 2026
Sierpiński Triangle
dokutan
342
370ms
27 Jun 2026
Rule 110
dokutan
1,436
359ms
27 Jun 2026
Rijndael S-box
dokutan
784
363ms
27 Jun 2026
Recamán
dokutan
799
363ms
27 Jun 2026
Prime Numbers (Long)
dokutan
3,763
369ms
27 Jun 2026
Prime Numbers
dokutan
298
379ms
27 Jun 2026
Polyominoes
dokutan
1,114
376ms
27 Jun 2026
Pernicious Numbers (Long)
dokutan
13,614
383ms
27 Jun 2026
Pernicious Numbers
dokutan
314
393ms
27 Jun 2026
Pascal’s Triangle
dokutan
662
334ms
27 Jun 2026
Partition Numbers
dokutan
674
361ms
27 Jun 2026
Odious Numbers (Long)
dokutan
1,486
395ms
27 Jun 2026
Odious Numbers
dokutan
300
367ms
27 Jun 2026
Number Spiral
dokutan
435
347ms
27 Jun 2026
Niven Numbers (Long)
dokutan
4,723
362ms
27 Jun 2026
Niven Numbers
dokutan
310
335ms
27 Jun 2026
N Queens
dokutan
878
358ms
27 Jun 2026
Mandelbrot
dokutan
479
345ms
27 Jun 2026
Lucky Numbers
dokutan
3,088
373ms
27 Jun 2026
Look and Say
dokutan
547
404ms
27 Jun 2026
ln 2
dokutan
904
357ms
27 Jun 2026
Leyland Numbers
dokutan
814
356ms
27 Jun 2026
Leap Years
dokutan
540
357ms
27 Jun 2026
Kolakoski Sequence
dokutan
396
369ms
27 Jun 2026
Kolakoski Constant
dokutan
906
343ms
27 Jun 2026
Kaprekar Numbers
dokutan
524
390ms
27 Jun 2026
Inventory Sequence
dokutan
1,400
388ms
27 Jun 2026
Hilbert Curve
dokutan
618
377ms
27 Jun 2026
Hexagonal Spiral
dokutan
450
412ms
27 Jun 2026
Happy Numbers (Long)
dokutan
588
382ms
27 Jun 2026
Happy Numbers
dokutan
323
394ms
27 Jun 2026
Gijswijt’s Sequence
dokutan
318
383ms
27 Jun 2026
Foo Fizz Buzz Bar
dokutan
1,336
379ms
27 Jun 2026
Fizz Buzz
dokutan
408
364ms
27 Jun 2026
Fibonacci
dokutan
340
358ms
27 Jun 2026
Farey Sequence
dokutan
2,362
402ms
27 Jun 2026
Factorial Factorisation
dokutan
714
417ms
27 Jun 2026
Evil Numbers (Long)
dokutan
1,487
367ms
27 Jun 2026
Evil Numbers
dokutan
298
412ms
27 Jun 2026
Emirp Numbers (Long)
dokutan
908
417ms
27 Jun 2026
Emirp Numbers
dokutan
336
406ms
27 Jun 2026
Dragon Curve
dokutan
1,347
426ms
27 Jun 2026
Divisors
dokutan
800
392ms
27 Jun 2026
Diamonds
dokutan
323
386ms
27 Jun 2026
Cubes
dokutan
702
408ms
27 Jun 2026
Collatz
dokutan
1,522
387ms
27 Jun 2026
Christmas Trees
dokutan
378
393ms
27 Jun 2026
Catalan’s Constant
dokutan
903
379ms
27 Jun 2026
Catalan Numbers
dokutan
2,187
393ms
27 Jun 2026
ASCII Table
dokutan
491
401ms
27 Jun 2026
Ascending Primes
dokutan
503
368ms
27 Jun 2026
Arithmetic Numbers
dokutan
23,292
385ms
27 Jun 2026
Alphabetic Numbers
dokutan
2,442
375ms
27 Jun 2026
Abundant Numbers (Long)
dokutan
850
389ms
27 Jun 2026
Abundant Numbers
dokutan
356
371ms
27 Jun 2026
24 Game
dokutan
4,426
388ms
27 Jun 2026
12 Days of Christmas
dokutan
644
392ms
27 Jun 2026
99 Bottles of Beer
dokutan
1,380
400ms
27 Jun 2026
Tongue-twisters
dokutan
494
386ms
27 Jun 2026
𝑒
dokutan
904
381ms
27 Jun 2026
Leap Years
bthalheim
101
384ms
2 Jun 2026
Look and Say
bthalheim
1,334
496ms
23 May 2026
λ
bthalheim
1,056
372ms
23 May 2026
Collatz
bthalheim
128
358ms
23 May 2026
Fizz Buzz
bthalheim
157
374ms
23 May 2026
Ulam Sequence
HumanoidCPU
1,146
317ms
12 May 2026
Ulam Sequence
Shanethegamer
1,146
341ms
11 May 2026
Fibonacci
Matter1024
85
461ms
4 May 2026
Taxicab Numbers
FortuiteMan
224
515ms
28 Apr 2026
Tutorial
FortuiteMan
137
640ms
28 Apr 2026