The
Minesweeper
hole will go live in approximately
30 hours
. Why not try and solve it ahead of time?
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Golfers
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12 Days of Christmas
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99 Bottles of Beer
Abundant Numbers
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Arrows
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brainfuck
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Catalan’s Constant
Christmas Trees
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Emirp Numbers
Emirp Numbers (Long)
Emojify
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Factorial Factorisation
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Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Happy Numbers
Happy Numbers (Long)
Hexdump
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Intersection
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ISBN
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Kolakoski Sequence
Leap Years
Levenshtein Distance
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ln 2
Look and Say
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Mahjong
Mandelbrot
Maze
Medal Tally
Morse Decoder
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Musical Chords
N Queens
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)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
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Assembly
AWK
Bash
BASIC
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brainfuck
C
C#
C++
Civet
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COBOL
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Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
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Hexagony
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
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
Morse Decoder
Morse Encoder
Musical Chords
N Queens
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)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Apéry’s Constant
Calendar
Connect Four
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Minesweeper
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Tower of Hanoi
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Tutorial
Babafaba
178
9ms
14 days ago
Quine
snoozingnewt
15
5ms
18 days ago
Fizz Buzz
snoozingnewt
119
5ms
24 days ago
Tutorial
therealnumbers
121
7ms
26 Sep 2025
Tutorial
retrohun
178
7ms
19 Sep 2025
Tutorial
snoozingnewt
40
7ms
15 Sep 2025
Fizz Buzz
CaedenHarper
61
5ms
28 Aug 2025
Tutorial
Vexxter9
178
6ms
21 Aug 2025
Tutorial
frankgraziano
40
8ms
13 Aug 2025
Tutorial
Upload-and-View
133
6ms
25 Jul 2025
Tutorial
Bpc-CPU
178
8ms
12 Jul 2025
Quine
sean-niemann
9
5ms
29 Jun 2025
Quine
gigaprofisi
14
5ms
29 Jun 2025
Tutorial
Shanethegamer
40
7ms
6 Jun 2025
√2
HumanoidCPU
1,994
6ms
5 Jun 2025
Tutorial
emgordon154
76
7ms
3 May 2025
Trinomial Triangle
KatieLG
2,112
5ms
27 Apr 2025
Sphenic Numbers
KatieLG
12,465
14ms
27 Apr 2025
Semiprime Numbers
KatieLG
18,044
14ms
27 Apr 2025
Odd Polyomino Tiling
KatieLG
29,388
21ms
27 Apr 2025
Highly Composite Numbers
KatieLG
519
6ms
27 Apr 2025
Hexagonal Spiral
KatieLG
1,326
5ms
27 Apr 2025
Tutorial
DialFrost
40
7ms
20 Apr 2025
Tutorial
zacjl
37
6ms
20 Apr 2025
𝑒
KatieLG
1,010
5ms
20 Apr 2025
√2
KatieLG
1,010
6ms
20 Apr 2025
φ
KatieLG
1,010
5ms
20 Apr 2025
τ
KatieLG
1,010
5ms
20 Apr 2025
π
KatieLG
1,010
5ms
20 Apr 2025
λ
KatieLG
1,010
5ms
20 Apr 2025
γ
KatieLG
1,010
5ms
20 Apr 2025
Van Eck Sequence
KatieLG
4,560
9ms
20 Apr 2025
Vampire Numbers
KatieLG
1,386
6ms
20 Apr 2025
Tongue-twisters
KatieLG
552
5ms
20 Apr 2025
Smith Numbers
KatieLG
2,581
6ms
20 Apr 2025
Rijndael S-box
KatieLG
805
5ms
20 Apr 2025
Recamán
KatieLG
1,402
5ms
20 Apr 2025
Prime Numbers (Long)
KatieLG
8,411
9ms
20 Apr 2025
Prime Numbers
KatieLG
126
5ms
20 Apr 2025
Polyominoes
KatieLG
5,493
8ms
20 Apr 2025
Pernicious Numbers (Long)
KatieLG
29,171
19ms
20 Apr 2025
Pernicious Numbers
KatieLG
175
5ms
20 Apr 2025
Pascal’s Triangle
KatieLG
814
5ms
20 Apr 2025
Partition Numbers
KatieLG
852
5ms
20 Apr 2025
Odious Numbers (Long)
KatieLG
2,950
6ms
20 Apr 2025
Odious Numbers
KatieLG
130
5ms
20 Apr 2025
Number Spiral
KatieLG
343
5ms
20 Apr 2025
Niven Numbers (Long)
KatieLG
10,519
10ms
20 Apr 2025
Niven Numbers
KatieLG
162
5ms
20 Apr 2025
N Queens
KatieLG
1,547
6ms
20 Apr 2025
Lucky Numbers
KatieLG
6,825
8ms
20 Apr 2025
Look and Say
KatieLG
1,324
5ms
20 Apr 2025
ln 2
KatieLG
1,010
5ms
20 Apr 2025
Leyland Numbers
KatieLG
1,105
5ms
20 Apr 2025
Leap Years
KatieLG
1,027
5ms
20 Apr 2025
Kolakoski Sequence
KatieLG
2,007
5ms
20 Apr 2025
Kolakoski Constant
KatieLG
1,010
5ms
20 Apr 2025
Kaprekar Numbers
KatieLG
581
5ms
20 Apr 2025
Inventory Sequence
KatieLG
4,628
8ms
20 Apr 2025
Happy Numbers (Long)
KatieLG
843
5ms
20 Apr 2025
Happy Numbers
KatieLG
176
5ms
20 Apr 2025
Gijswijt’s Sequence
KatieLG
4,005
6ms
20 Apr 2025
Foo Fizz Buzz Bar
KatieLG
7,724
8ms
20 Apr 2025
Fizz Buzz
KatieLG
618
6ms
20 Apr 2025
Fibonacci
KatieLG
201
5ms
20 Apr 2025
Farey Sequence
KatieLG
5,909
7ms
20 Apr 2025
Factorial Factorisation
KatieLG
869
5ms
20 Apr 2025
Evil Numbers (Long)
KatieLG
2,957
6ms
20 Apr 2025
Evil Numbers
KatieLG
125
5ms
20 Apr 2025
Emirp Numbers (Long)
KatieLG
1,641
5ms
20 Apr 2025
Emirp Numbers
KatieLG
213
5ms
20 Apr 2025
Divisors
KatieLG
1,371
6ms
20 Apr 2025
Diamonds
KatieLG
1,270
6ms
20 Apr 2025
Collatz
KatieLG
5,231
7ms
20 Apr 2025
Christmas Trees
KatieLG
648
5ms
20 Apr 2025