The
Snake
hole will go live in approximately
7 hours
. Why not try and solve it ahead of time?
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12 Days of Christmas
24 Game
99 Bottles of Beer
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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
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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
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Coconut
Common Lisp
Crystal
D
Dart
Elixir
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Forth
Fortran
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Go
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Groovy
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Hexagony
iogii
J
Janet
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JavaScript
jq
Julia
K
Kotlin
Lua
Nim
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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
2,503
97ms
3 hours ago
Polyominoes
Steffan153
💎
147
110ms
40 hours ago
Forsyth–Edwards Notation
Lv0Sys
225
110ms
3 days ago
Tongue-twisters
Mukundan314
🥈
305
100ms
3 days ago
24 Game
soumyadeep9474
2,210
220ms
4 days ago
12 Days of Christmas
soumyadeep9474
898
103ms
4 days ago
Snake
madex
172
120ms
4 days ago
Forsyth–Edwards Notation
blaztoma
194
106ms
5 days ago
Leap Years
albanian-laundromat
62
103ms
5 days ago
Forsyth–Edwards Notation
Matter1024
232
101ms
5 days ago
Forsyth–Edwards Notation
bitsandbeyond
146
101ms
7 days ago
Forsyth–Edwards Notation
JayXon
💎
136
107ms
7 days ago
Quine
emgordon154
177
99ms
7 days ago
Forsyth–Edwards Notation
madex
163
111ms
7 days ago
Forsyth–Edwards Notation
BREMAUCY
231
99ms
7 days ago
Tower of Hanoi
albanian-laundromat
73
103ms
7 days ago
Forsyth–Edwards Notation
jared-hughes
206
100ms
8 days ago
Forsyth–Edwards Notation
pardouin
156
108ms
8 days ago
Farey Sequence
albanian-laundromat
85
111ms
8 days ago
Forsyth–Edwards Notation
CornerMercury
184
133ms
9 days ago
Forsyth–Edwards Notation
scpchicken
240
114ms
9 days ago
Forsyth–Edwards Notation
JOrE20
193
115ms
9 days ago
Forsyth–Edwards Notation
tomh1012
210
111ms
9 days ago
Forsyth–Edwards Notation
HumanoidCPU
200
106ms
9 days ago
Forsyth–Edwards Notation
KatieLG
165
108ms
9 days ago
Game of Life
Steffan153
💎
121
110ms
12 days ago
Tutorial
zzh1996
65
154ms
13 days ago
Fibonacci
christos-cantina-security
75
108ms
15 days ago
Pernicious Numbers
albanian-laundromat
53
120ms
15 days ago
Pernicious Numbers
CornerMercury
49
109ms
15 days ago
Gijswijt’s Sequence
Steffan153
💎
112
105ms
16 days ago
Seven Segment
bitsandbeyond
134
118ms
18 days ago
Zodiac Signs
Steffan153
🥈
167
127ms
21 days ago
Pangram Grep
Steffan153
🥇
75
105ms
22 days ago
Hexdump
Steffan153
🥈
234
114ms
22 days ago
Connect Four
emgordon154
365
175ms
23 days ago
Sudoku
bitsandbeyond
💎
396
170ms
24 days ago
Chess Move Validation
edsrzf
🥇
102
166ms
25 days ago
Chess Move Validation
Steffan153
🥇
102
160ms
25 days ago
𝑒
albanian-laundromat
135
132ms
26 days ago
Look and Say
jipsong
🥈
107
114ms
27 days ago
Chess Move Validation
zzh1996
🥉
110
146ms
29 Aug 2026
Chess Move Validation
bitsandbeyond
137
140ms
28 Aug 2026
Binary Lambda Calculus
bitsandbeyond
303
130ms
27 Aug 2026
Catalan’s Constant
Steffan153
🥈
119
140ms
27 Aug 2026
ln 2
Steffan153
🥇
88
136ms
27 Aug 2026
τ
Steffan153
🥇
101
146ms
27 Aug 2026
π
Steffan153
🥇
97
134ms
27 Aug 2026
τ
JayXon
🥇
101
138ms
27 Aug 2026
π
JayXon
🥇
97
146ms
27 Aug 2026
Gray Code Encoder
albanian-laundromat
79
131ms
25 Aug 2026
Thue–Morse Constant
HumanoidCPU
1,020
126ms
24 Aug 2026
Morse Encoder
Steffan153
💎
150
129ms
23 Aug 2026
Tutorial
quasar098
211
159ms
20 Aug 2026
Connect Four
scpchicken
698
131ms
20 Aug 2026
Pangram Grep
Ralac07
127
163ms
20 Aug 2026
Musical Chords
edsrzf
🥇
121
163ms
19 Aug 2026
Flags
bitsandbeyond
699
180ms
19 Aug 2026
Foo Fizz Buzz Bar
scpchicken
5,751
127ms
16 Aug 2026
Gijswijt’s Sequence
scpchicken
2,032
143ms
16 Aug 2026
Hexagonal Spiral
bitsandbeyond
266
133ms
14 Aug 2026
Diamonds
KasperKivimaeki
92
117ms
13 Aug 2026
Zodiac Signs
Yax42
189
127ms
13 Aug 2026
Connect Four
tomh1012
438
2,810ms
11 Aug 2026
Billiards
Steffan153
💎
160
130ms
11 Aug 2026
Factorial Factorisation
scpchicken
607
132ms
10 Aug 2026
Emojify
scpchicken
607
144ms
10 Aug 2026
Emirp Numbers (Long)
scpchicken
608
129ms
10 Aug 2026
Emirp Numbers
scpchicken
550
138ms
10 Aug 2026
Divisors
scpchicken
192
137ms
10 Aug 2026
Diamonds
scpchicken
621
149ms
10 Aug 2026
DFA Simulator
scpchicken
656
146ms
10 Aug 2026
Chess Move Validation
KasperKivimaeki
135
165ms
9 Aug 2026
Emirp Numbers (Long)
KasperKivimaeki
116
160ms
9 Aug 2026
CSS Colors
scpchicken
3,769
145ms
8 Aug 2026
Farey Sequence
scpchicken
237
138ms
8 Aug 2026
Cubes
scpchicken
766
138ms
8 Aug 2026
Yellowstone Permutation
HumanoidCPU
4,032
123ms
8 Aug 2026
Odious Numbers (Long)
scpchicken
🥇
49
124ms
7 Aug 2026
Odious Numbers
scpchicken
🥇
48
117ms
7 Aug 2026
Evil Numbers (Long)
scpchicken
🥇
50
117ms
7 Aug 2026
Evil Numbers
scpchicken
🥇
48
104ms
7 Aug 2026
Pernicious Numbers
scpchicken
🥇
47
107ms
7 Aug 2026
Niven Numbers
scpchicken
🥇
53
118ms
7 Aug 2026
Continued Fractions
scpchicken
684
127ms
7 Aug 2026
Collatz
scpchicken
227
112ms
6 Aug 2026
Christmas Trees
scpchicken
300
126ms
6 Aug 2026
Day of Week
scpchicken
716
160ms
6 Aug 2026
Catalan’s Constant
scpchicken
1,059
110ms
3 Aug 2026
Catalan Numbers
scpchicken
163
120ms
3 Aug 2026
Card Number Validation
scpchicken
545
129ms
3 Aug 2026
Calendar
scpchicken
1,001
147ms
3 Aug 2026
brainfuck
scpchicken
1,205
141ms
3 Aug 2026
Billiards
scpchicken
843
155ms
3 Aug 2026
ASCII Table
scpchicken
423
132ms
3 Aug 2026
Ascending Primes
scpchicken
558
134ms
3 Aug 2026
Arrows
scpchicken
805
151ms
3 Aug 2026
Arabic to Roman
scpchicken
1,004
138ms
3 Aug 2026
Arithmetic Numbers
scpchicken
381
140ms
3 Aug 2026
Alphabetic Numbers
scpchicken
🥉
520
117ms
3 Aug 2026