Recent Solutions
Achievements
Cheevos
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
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
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
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
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
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
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
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
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
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Inventory Sequence
kg583
14
422ms
5 days ago
12 Days of Christmas
plcc0
293
334ms
11 days ago
Fibonacci
plcc0
8
147ms
11 days ago
Tutorial
edward-Han1024
28
214ms
21 days ago
Alphabetic Numbers
HumanoidCPU
3,895
154ms
26 days ago
γ
JOrE20
939
171ms
27 Feb 2026
Continued Fractions
kg583
18
245ms
27 Feb 2026
Gray Code Encoder
JOrE20
7
275ms
27 Feb 2026
Partition Numbers
JOrE20
647
140ms
26 Feb 2026
Fibonacci
kg583
7
147ms
24 Feb 2026
Cubes
JOrE20
765
173ms
24 Feb 2026
Odious Numbers (Long)
JOrE20
8
219ms
24 Feb 2026
Evil Numbers
JOrE20
8
179ms
24 Feb 2026
Odious Numbers
JOrE20
8
194ms
24 Feb 2026
Evil Numbers (Long)
JOrE20
9
209ms
24 Feb 2026
Fibonacci
JOrE20
7
149ms
24 Feb 2026
ROT13
JOrE20
3
234ms
24 Feb 2026
Quine
JOrE20
3
164ms
24 Feb 2026
Fractions
JOrE20
2
181ms
24 Feb 2026
Vampire Numbers
JOrE20
1,071
147ms
21 Feb 2026
Rijndael S-box
JOrE20
768
142ms
15 Feb 2026
N Queens
JOrE20
997
163ms
5 Feb 2026
24 Game
JOrE20
5,957
251ms
5 Feb 2026
Collatz
JOrE20
1,839
202ms
3 Feb 2026
Pascal’s Triangle
JOrE20
17
184ms
3 Feb 2026
Seven Segment
JOrE20
42
207ms
3 Feb 2026
Tutorial
FortuiteMan
76
353ms
3 Feb 2026
Multitap Input
kg583
24
265ms
28 Jan 2026
Ten-pin Bowling
kg583
56
223ms
27 Jan 2026
π
Andrey2001
1,003
156ms
27 Jan 2026
Tutorial
Mefred
76
359ms
15 Jan 2026
𝑒
JOrE20
1,003
142ms
5 Jan 2026
Polyominoes
JOrE20
1,100
174ms
3 Jan 2026
Tutorial
te-chnical
76
402ms
1 Jan 2026
Mandelbrot
JOrE20
447
151ms
31 Dec 2025
Hilbert Curve
JOrE20
666
155ms
31 Dec 2025
Tongue-twisters
JOrE20
323
272ms
31 Dec 2025
Fizz Buzz
JOrE20
25
279ms
17 Dec 2025
Hexagonal Spiral
kurkale6ka
1,135
154ms
11 Dec 2025
Tutorial
kurkale6ka
26
220ms
11 Dec 2025
12 Days of Christmas
kurkale6ka
2,369
171ms
11 Dec 2025
Tower of Hanoi
KatieLG
3,579
161ms
30 Nov 2025
𝑒
BREMAUCY
1,003
191ms
27 Nov 2025
Taxicab Numbers
HumanoidCPU
4,160
160ms
27 Nov 2025
Taxicab Numbers
Shanethegamer
4,160
195ms
26 Nov 2025
Smooth Numbers
kg583
12
1,049ms
23 Nov 2025
Kolakoski Sequence
HumanoidCPU
2,000
150ms
12 Nov 2025
Tower of Hanoi
HumanoidCPU
3,577
156ms
6 Nov 2025
Tower of Hanoi
kg583
23
266ms
30 Oct 2025
Tower of Hanoi
Shanethegamer
3,577
148ms
30 Oct 2025
Tutorial
Babafaba
76
355ms
15 Oct 2025
Quine
snoozingnewt
5
146ms
12 Oct 2025
Tutorial
snoozingnewt
17
360ms
15 Sep 2025
Fizz Buzz
snoozingnewt
25
313ms
14 Sep 2025
Fizz Buzz
madex
44
307ms
3 Sep 2025
Fizz Buzz
CaedenHarper
44
301ms
28 Aug 2025
Tutorial
Vexxter9
76
345ms
21 Aug 2025
Hexagonal Spiral
HumanoidCPU
1,135
148ms
18 Aug 2025
Highly Composite Numbers
HumanoidCPU
392
134ms
18 Aug 2025
Hilbert Curve
HumanoidCPU
5,118
139ms
18 Aug 2025
Abundant Numbers (Long)
HumanoidCPU
964
136ms
18 Aug 2025
Polyominoes
HumanoidCPU
3,564
147ms
18 Aug 2025
Recamán
HumanoidCPU
897
149ms
18 Aug 2025
Rule 110
HumanoidCPU
15,852
160ms
18 Aug 2025
Pascal’s Triangle
HumanoidCPU
769
150ms
18 Aug 2025
Kaprekar Numbers
HumanoidCPU
440
147ms
18 Aug 2025
Happy Numbers
HumanoidCPU
107
143ms
18 Aug 2025
Happy Numbers (Long)
HumanoidCPU
552
142ms
18 Aug 2025
Emirp Numbers (Long)
HumanoidCPU
1,156
146ms
18 Aug 2025
Catalan Numbers
HumanoidCPU
2,872
151ms
18 Aug 2025
Tongue-twisters
HumanoidCPU
523
147ms
18 Aug 2025
Look and Say
HumanoidCPU
1,279
150ms
15 Aug 2025
Farey Sequence
HumanoidCPU
4,354
159ms
15 Aug 2025
Diamonds
HumanoidCPU
1,103
151ms
14 Aug 2025
Niven Numbers
HumanoidCPU
91
146ms
14 Aug 2025
Lucky Numbers
HumanoidCPU
4,820
159ms
14 Aug 2025
Inventory Sequence
HumanoidCPU
2,623
144ms
14 Aug 2025
Gijswijt’s Sequence
HumanoidCPU
2,000
150ms
14 Aug 2025
Smith Numbers
HumanoidCPU
1,824
145ms
14 Aug 2025
Arithmetic Numbers
HumanoidCPU
37,642
323ms
14 Aug 2025