Recent Solutions
Golfers
Solutions
All Holes
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
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
Quadratic Formula
Semiprime Numbers
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
All Languages
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
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
05AB1E
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Erlang
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
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
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
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
Snake
Sphenic Numbers
Trinomial Triangle
Turtle
Tutorial
Hole
Golfer
Bytes
Submitted
Rock-paper-scissors-Spock-lizard
snoozingnewt
692
12 hours ago
Collatz
kmathis22
104
3 days ago
Reversi
edsrzf
💎
119
5 days ago
Pernicious Numbers (Long)
edsrzf
82
6 days ago
Pangram Grep
edsrzf
🥇
71
8 days ago
Gijswijt’s Sequence
primo-ppcg
118
10 days ago
Rock-paper-scissors-Spock-lizard
blaztoma
1,372
10 days ago
𝑒
Jacob385
1,011
11 days ago
Inventory Sequence
blaztoma
132
12 days ago
Lucky Numbers
edsrzf
101
14 days ago
Hilbert Curve
HumanoidCPU
5,157
17 days ago
Hilbert Curve
dokutan
💎
567
17 days ago
Hilbert Curve
CaedenHarper
🥈
5,125
17 days ago
Odd Polyomino Tiling
HumanoidCPU
21,645
20 days ago
Pascal’s Triangle
sean-niemann
🥇
63
21 days ago
Arithmetic Numbers
sean-niemann
🥇
66
22 days ago
Tutorial
Vexxter9
146
24 days ago
Transpose Sentence
edsrzf
💎
88
24 days ago
λ
gigaprofisi
1,011
27 days ago
Sphenic Numbers
HumanoidCPU
8,867
27 days ago
Trinomial Triangle
HumanoidCPU
2,074
27 days ago
Mandelbrot
CaedenHarper
10,011
16 Aug 2025
Partition Numbers
CaedenHarper
654
16 Aug 2025
Topological Sort
edsrzf
💎
137
15 Aug 2025
Farey Sequence
HumanoidCPU
5,136
15 Aug 2025
Topological Sort
Shanethegamer
🥈
156
4 Aug 2025
Polyominoes
edsrzf
💎
299
31 Jul 2025
Tic-tac-toe
edsrzf
💎
98
30 Jul 2025
Gijswijt’s Sequence
emgordon154
🥉
111
29 Jul 2025
Fizz Buzz
hiichbindermax
107
28 Jul 2025
Jacobi Symbol
edsrzf
🥈
160
24 Jul 2025
ISBN
edsrzf
💎
92
24 Jul 2025
Card Number Validation
edsrzf
💎
86
24 Jul 2025
Pernicious Numbers
edsrzf
41
22 Jul 2025
Arabic to Roman
edsrzf
💎
122
22 Jul 2025
Tutorial
LostSyntax21
59
19 Jul 2025
τ
RaBa21
1,012
19 Jul 2025
Ten-pin Bowling
edsrzf
💎
160
16 Jul 2025
Fizz Buzz
dokutan
100
15 Jul 2025
Proximity Grid
edsrzf
💎
141
14 Jul 2025
Tutorial
Bpc-CPU
146
12 Jul 2025
ROT13
edsrzf
💎
91
9 Jul 2025
Hexdump
edsrzf
💎
167
7 Jul 2025
Hexdump
primo-ppcg
🥈
168
7 Jul 2025
Emirp Numbers (Long)
primo-ppcg
💎
104
6 Jul 2025
Zeckendorf Representation
edsrzf
🥈
136
4 Jul 2025
ROT13
dokutan
821
3 Jul 2025
CSS Colors (Inverse)
Shanethegamer
2,674
1 Jul 2025
Mandelbrot
edsrzf
💎
142
1 Jul 2025
Mandelbrot
dokutan
🥈
400
30 Jun 2025
Mandelbrot
HumanoidCPU
10,052
30 Jun 2025
Roman to Arabic
edsrzf
🥉
96
29 Jun 2025
Emirp Numbers
edsrzf
74
29 Jun 2025
Christmas Trees
edsrzf
98
29 Jun 2025
Factorial Factorisation
edsrzf
🥉
149
29 Jun 2025
Flags
Shanethegamer
5,439
27 Jun 2025
DFA Simulator
edsrzf
💎
170
27 Jun 2025
Medal Tally
edsrzf
💎
143
26 Jun 2025
Evil Numbers (Long)
edsrzf
63
26 Jun 2025
Odious Numbers (Long)
edsrzf
62
26 Jun 2025
λ
edsrzf
🥉
541
24 Jun 2025
Billiards
edsrzf
💎
143
23 Jun 2025
CSS Colors
edsrzf
💎
837
23 Jun 2025
Trinomial Triangle
edsrzf
76
21 Jun 2025
Zodiac Signs
edsrzf
🥉
187
21 Jun 2025
ASCII Table
edsrzf
120
20 Jun 2025
Mandelbrot
MeWhenI
🥉
616
20 Jun 2025
Morse Encoder
edsrzf
💎
190
19 Jun 2025
Rock-paper-scissors-Spock-lizard
Jacob385
834
19 Jun 2025
Ordinal Numbers
edsrzf
💎
90
18 Jun 2025
Spelling Numbers
edsrzf
🥈
387
17 Jun 2025
Vampire Numbers
edsrzf
💎
149
17 Jun 2025
Forsyth–Edwards Notation
edsrzf
💎
143
17 Jun 2025
Maze
edsrzf
156
11 Jun 2025
Happy Numbers (Long)
edsrzf
88
7 Jun 2025