The
Snake
hole will go live in approximately
28 hours
. Why not try and solve it ahead of time?
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Cheevos
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
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Billiards
brainfuck
Calendar
Card Number Validation
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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
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F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
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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
24 Game
JOrE20
12,437
116ms
4 days ago
Snake
madex
178
315ms
4 days ago
Gijswijt’s Sequence
Natanaelel
110
1,417ms
5 days ago
ln 2
Natanaelel
🥉
42
126ms
5 days ago
Pangram Grep
Natanaelel
34
108ms
6 days ago
Time Distance
Natanaelel
240
162ms
6 days ago
Quine
zzh1996
🥇
17
88ms
7 days ago
Game of Life
Natanaelel
153
177ms
7 days ago
π
Natanaelel
54
4,386ms
10 days ago
Fibonacci
albanian-laundromat
21
113ms
11 days ago
Prime Numbers (Long)
albanian-laundromat
23
147ms
11 days ago
Prime Numbers
albanian-laundromat
🥇
21
106ms
11 days ago
Pernicious Numbers
albanian-laundromat
🥇
24
109ms
11 days ago
Thue–Morse Constant
Natanaelel
48
125ms
13 days ago
Emirp Numbers (Long)
christos-cantina-security
44
148ms
14 days ago
DFA Simulator
christos-cantina-security
🥉
114
188ms
14 days ago
Set
christos-cantina-security
🥉
63
354ms
14 days ago
Connect Four
christos-cantina-security
💎
156
209ms
14 days ago
Kolakoski Constant
Natanaelel
💎
57
149ms
14 days ago
Repeating Decimals
christos-cantina-security
50
182ms
14 days ago
Foo Fizz Buzz Bar
christos-cantina-security
60
135ms
14 days ago
Fibonacci
christos-cantina-security
🥇
19
116ms
14 days ago
Hexdump
Natanaelel
🥇
97
171ms
21 days ago
Thue–Morse Constant
bitsandbeyond
68
148ms
22 days ago
Sudoku (Fill-in)
scpchicken
🥉
194
242ms
23 days ago
Musical Chords
madex
113
169ms
23 days ago
Chess Move Validation
edsrzf
💎
81
178ms
25 days ago
Tutorial
zzh1996
34
169ms
31 Aug 2026
√2
Steffan153
🥇
32
290ms
31 Aug 2026
Chess Move Validation
zzh1996
🥈
89
198ms
30 Aug 2026
Divisors
JOrE20
29
176ms
29 Aug 2026
Thue–Morse Constant
HumanoidCPU
1,008
112ms
24 Aug 2026
Divisors
denkyuu1
43
107ms
24 Aug 2026
Ulam Sequence
GrayJoKing
🥈
50
604ms
24 Aug 2026
τ
egu555
67
2,559ms
21 Aug 2026
π
egu555
63
2,615ms
21 Aug 2026
Tutorial
quasar098
39
181ms
21 Aug 2026
Foo Fizz Buzz Bar
JOrE20
69
131ms
20 Aug 2026
Hexagonal Spiral
bitsandbeyond
183
145ms
20 Aug 2026
Musical Chords
edsrzf
🥇
86
157ms
19 Aug 2026
Niven Numbers
JOrE20
28
115ms
19 Aug 2026
Niven Numbers (Long)
JOrE20
30
164ms
19 Aug 2026
Leyland Numbers
JOrE20
63
116ms
19 Aug 2026
Pernicious Numbers
JOrE20
26
121ms
19 Aug 2026
Emirp Numbers
JOrE20
51
137ms
19 Aug 2026
Emirp Numbers (Long)
JOrE20
51
215ms
19 Aug 2026
Prime Numbers
JOrE20
23
108ms
19 Aug 2026
Seven Segment
bitsandbeyond
95
143ms
13 Aug 2026
Chess Move Validation
bitsandbeyond
🥉
112
199ms
13 Aug 2026
Cubes
bitsandbeyond
🥈
175
145ms
13 Aug 2026
Levenshtein Distance
Natanaelel
53
152ms
12 Aug 2026
Alphabetic Numbers
Natanaelel
🥈
162
187ms
11 Aug 2026
Ulam Sequence
Natanaelel
🥉
59
301ms
10 Aug 2026
SI Units
zzh1996
🥈
371
229ms
10 Aug 2026
Yellowstone Permutation
Natanaelel
170
2,568ms
8 Aug 2026
Yellowstone Permutation
HumanoidCPU
4,016
116ms
8 Aug 2026
Card Number Validation
scpchicken
🥉
48
1,115ms
7 Aug 2026
Proximity Grid
scpchicken
💎
83
288ms
6 Aug 2026
Van Eck Sequence
Steffan153
🥈
37
172ms
5 Aug 2026
Flags
bitsandbeyond
651
330ms
2 Aug 2026
ROT13
JOrE20
53
124ms
1 Aug 2026
Ulam Sequence
Steffan153
💎
44
562ms
1 Aug 2026
Ulam Sequence
dokutan
993
118ms
31 Jul 2026
Ulam Sequence
denkyuu1
611
3,523ms
28 Jul 2026
Musical Chords
scpchicken
115
169ms
27 Jul 2026
Ulam Sequence
scpchicken
73
168ms
26 Jul 2026
Gray Code Encoder
JOrE20
32
316ms
21 Jul 2026
Continued Fractions
scpchicken
56
541ms
21 Jul 2026
Vampire Numbers
scpchicken
159
2,875ms
21 Jul 2026
Tic-tac-toe
scpchicken
73
213ms
21 Jul 2026
Semiprime Numbers
scpchicken
63
796ms
21 Jul 2026
Billiards
scpchicken
🥉
114
166ms
21 Jul 2026
Reversi
scpchicken
101
507ms
21 Jul 2026
Leap Years
scpchicken
33
132ms
21 Jul 2026
Rijndael S-box
scpchicken
195
177ms
21 Jul 2026
√2
scpchicken
43
127ms
21 Jul 2026
𝑒
scpchicken
44
170ms
21 Jul 2026
γ
scpchicken
🥉
143
258ms
21 Jul 2026
Spelling Numbers
scpchicken
333
199ms
21 Jul 2026
Lucky Numbers
scpchicken
63
524ms
21 Jul 2026
N Queens
scpchicken
74
1,201ms
21 Jul 2026
QR Decoder
scpchicken
183
159ms
21 Jul 2026
United States
scpchicken
96
192ms
21 Jul 2026
Cubes
scpchicken
210
152ms
21 Jul 2026
Set
scpchicken
71
823ms
21 Jul 2026
Maze
scpchicken
135
2,099ms
21 Jul 2026
Inventory Sequence
scpchicken
50
455ms
21 Jul 2026
Taxicab Numbers
scpchicken
69
419ms
21 Jul 2026
Kaprekar Numbers
scpchicken
🥈
121
3,620ms
21 Jul 2026
Arithmetic Numbers
scpchicken
87
935ms
21 Jul 2026
Polyominoes
scpchicken
306
294ms
21 Jul 2026
Poker
scpchicken
269
176ms
21 Jul 2026
Hilbert Curve
scpchicken
🥉
392
293ms
21 Jul 2026
Calendar
scpchicken
161
172ms
21 Jul 2026
24 Game
scpchicken
🥉
384
4,396ms
21 Jul 2026
Partition Numbers
scpchicken
62
717ms
21 Jul 2026
Sierpiński Triangle
scpchicken
57
175ms
21 Jul 2026
Mandelbrot
scpchicken
🥉
97
2,818ms
20 Jul 2026
Rule 110
scpchicken
77
177ms
20 Jul 2026
Transpose Sentence
scpchicken
47
146ms
20 Jul 2026