The
Snake
hole will go live in approximately
22 hours
. Why not try and solve it ahead of time?
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brainfuck
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Emirp Numbers (Long)
Emojify
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Evil Numbers (Long)
Factorial Factorisation
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Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
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Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
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Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
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ISBN
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Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
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ln 2
Look and Say
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Lucky Tickets
Mahjong
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Medal Tally
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Morse Decoder
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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
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Semiprime Numbers
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Snake
Sphenic Numbers
Thue–Morse Constant
Turtle
Tutorial
Yellowstone Permutation
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ALGOL 68
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AWK
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BASIC
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brainfuck
C
C#
C++
Civet
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Coconut
Common Lisp
Crystal
D
Dart
Elixir
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F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
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Hexagony
iogii
J
Janet
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jq
Julia
K
Kotlin
Lua
Nim
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Perl
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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
Snake
madex
104
6ms
2 days ago
Card Number Validation
Europe2048
64
5ms
3 days ago
Happy Numbers (Long)
Europe2048
35
11ms
8 days ago
Gray Code Decoder
Europe2048
37
8ms
9 days ago
Odious Numbers (Long)
Europe2048
26
3ms
9 days ago
Odious Numbers
Europe2048
25
3ms
9 days ago
Ascending Primes
Europe2048
46
4ms
9 days ago
Gray Code Encoder
Europe2048
42
20ms
9 days ago
Roman to Arabic
Europe2048
88
20ms
10 days ago
Fizz Buzz
JOrE20
57
4ms
16 days ago
Fibonacci
JOrE20
22
3ms
16 days ago
Divisors
Europe2048
39
4ms
16 days ago
Fractions
Europe2048
43
4ms
18 days ago
Game of Life
AlephSquirrel
77
3ms
22 days ago
Sierpiński Triangle
AlephSquirrel
58
3ms
22 days ago
Gijswijt’s Sequence
ovs-code
52
2,879ms
22 days ago
Diamonds
ovs-code
63
4ms
22 days ago
Foo Fizz Buzz Bar
emgordon154
98
13ms
22 days ago
Roman to Arabic
emgordon154
88
23ms
22 days ago
Game of Life
Europe2048
68
3ms
22 days ago
99 Bottles of Beer
Europe2048
222
4ms
22 days ago
24 Game
ndren
300
44ms
23 days ago
Tutorial
JOrE20
39
3ms
24 days ago
Fibonacci
Veham
18
2ms
31 Aug 2026
Thue–Morse Constant
HumanoidCPU
1,006
2ms
24 Aug 2026
Prime Numbers (Long)
Europe2048
26
4ms
22 Aug 2026
Prime Numbers
Europe2048
25
2ms
22 Aug 2026
Tutorial
quasar098
88
4ms
20 Aug 2026
Foo Fizz Buzz Bar
HumanoidCPU
6,721
3ms
18 Aug 2026
Arithmetic Numbers
Europe2048
44
920ms
17 Aug 2026
Abundant Numbers (Long)
Europe2048
34
20ms
17 Aug 2026
Abundant Numbers
Europe2048
33
6ms
17 Aug 2026
ROT13
Europe2048
49
19ms
16 Aug 2026
Recamán
Europe2048
61
6ms
16 Aug 2026
Collatz
Europe2048
45
173ms
16 Aug 2026
Evil Numbers (Long)
Europe2048
29
3ms
15 Aug 2026
Foo Fizz Buzz Bar
Europe2048
75
5ms
15 Aug 2026
Leyland Numbers
Europe2048
39
4ms
15 Aug 2026
Kolakoski Sequence
Europe2048
39
4ms
15 Aug 2026
Look and Say
Europe2048
30
3ms
15 Aug 2026
Leap Years
Europe2048
40
4ms
15 Aug 2026
Taxicab Numbers
Europe2048
42
7ms
15 Aug 2026
Evil Numbers
Europe2048
27
3ms
14 Aug 2026
Niven Numbers
Europe2048
30
3ms
14 Aug 2026
Niven Numbers (Long)
Europe2048
32
8ms
14 Aug 2026
Sierpiński Triangle
Europe2048
72
4ms
14 Aug 2026
Transpose Sentence
Europe2048
50
6ms
13 Aug 2026
Smith Numbers
Europe2048
52
60ms
13 Aug 2026
Forsyth–Edwards Notation
Europe2048
88
6ms
13 Aug 2026
Rule 110
wleightond
107
15ms
12 Aug 2026
Game of Life
wleightond
71
3ms
12 Aug 2026
Happy Numbers
Europe2048
34
4ms
11 Aug 2026
ISBN
emgordon154
69
4ms
10 Aug 2026
Tongue-twisters
emgordon154
313
7ms
10 Aug 2026
Prime Numbers (Long)
emgordon154
27
12ms
10 Aug 2026
Niven Numbers
emgordon154
30
4ms
10 Aug 2026
Niven Numbers (Long)
emgordon154
32
20ms
10 Aug 2026
Taxicab Numbers
emgordon154
49
17ms
10 Aug 2026
Gijswijt’s Sequence
emgordon154
76
3ms
10 Aug 2026
Smith Numbers
emgordon154
44
29ms
10 Aug 2026
Arithmetic Numbers
emgordon154
44
908ms
9 Aug 2026
Pascal’s Triangle
emgordon154
33
3ms
9 Aug 2026
Van Eck Sequence
emgordon154
36
12ms
9 Aug 2026
Fizz Buzz
emgordon154
66
4ms
8 Aug 2026
Abundant Numbers (Long)
emgordon154
33
17ms
8 Aug 2026
Abundant Numbers
emgordon154
32
4ms
8 Aug 2026
Pangram Grep
emgordon154
43
5ms
8 Aug 2026
Look and Say
emgordon154
33
4ms
8 Aug 2026
Yellowstone Permutation
HumanoidCPU
5,013
3ms
8 Aug 2026
Quine
Europe2048
17
3ms
7 Aug 2026
Fibonacci
Europe2048
18
3ms
7 Aug 2026
Tutorial
Europe2048
39
4ms
6 Aug 2026
Fizz Buzz
Europe2048
55
3ms
6 Aug 2026
Day of Week
Europe2048
57
8ms
6 Aug 2026
Game of Life
halfminami
71
4ms
1 Aug 2026
Hexdump
halfminami
189
7ms
31 Jul 2026
Ulam Sequence
halfminami
66
166ms
30 Jul 2026
Tutorial
halfminami
42
4ms
30 Jul 2026
Fibonacci
Yewzir
21
3ms
9 Jul 2026
Hexdump
jakcharvat
295
8ms
25 Jun 2026
Look and Say
jakcharvat
38
5ms
25 Jun 2026
Vampire Numbers
jakcharvat
196
2,899ms
24 Jun 2026
Fizz Buzz
jakcharvat
81
4ms
24 Jun 2026
Tutorial
jakcharvat
39
3ms
23 Jun 2026
12 Days of Christmas
jakcharvat
482
4ms
23 Jun 2026
Prime Numbers
prestosilver
36
3ms
11 Jun 2026
Divisors
prestosilver
140
5ms
10 Jun 2026
Highly Composite Numbers
AlephSquirrel
79
120ms
7 Jun 2026
Transpose Sentence
Veham
56
5ms
3 Jun 2026
ROT13
scpchicken
47
5ms
29 May 2026
Fibonacci
Dominoscompute
18
3ms
23 May 2026
Quine
scpchicken
17
2ms
14 May 2026
Fizz Buzz
scpchicken
57
3ms
14 May 2026
Fibonacci
scpchicken
18
2ms
14 May 2026
Ulam Sequence
HumanoidCPU
1,345
3ms
12 May 2026
Ulam Sequence
Shanethegamer
1,345
2ms
11 May 2026
PalindromemordnilaP
Shanethegamer
49
4ms
8 May 2026
Nim
Shanethegamer
67
5ms
30 Apr 2026
Gray Code Decoder
Shanethegamer
49
571ms
29 Apr 2026
Taxicab Numbers
KatieLG
44
11ms
28 Apr 2026