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
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
Minesweeper
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
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
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
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
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
ALGOL 68
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
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
Minesweeper
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
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
Apéry’s Constant
Binary Lambda Calculus
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Bytes
Time
Submitted
Christmas Trees
Natanaelel
79
105ms
5 hours ago
Scrambled Sort
snoozingnewt
128
113ms
16 hours ago
Factorial Factorisation
ovs-code
🥉
116
122ms
23 hours ago
Hexagonal Spiral
HumanoidCPU
1,381
111ms
24 hours ago
Factorial Factorisation
lynn
💎
114
132ms
29 hours ago
brainfuck
Natanaelel
317
134ms
32 hours ago
Happy Numbers (Long)
snoozingnewt
74
150ms
42 hours ago
Happy Numbers
snoozingnewt
73
133ms
42 hours ago
Abundant Numbers (Long)
snoozingnewt
🥇
61
251ms
42 hours ago
Abundant Numbers
snoozingnewt
🥇
60
117ms
42 hours ago
Niven Numbers
snoozingnewt
🥇
52
104ms
42 hours ago
Divisors
snoozingnewt
🥇
66
113ms
42 hours ago
Tongue-twisters
prestosilver
550
104ms
3 days ago
Catalan Numbers
snoozingnewt
51
114ms
3 days ago
Cubes
dokutan
802
110ms
4 days ago
Tower of Hanoi
CaedenHarper
4,099
104ms
4 days ago
Tower of Hanoi
dokutan
295
118ms
5 days ago
Tower of Hanoi
KatieLG
4,099
108ms
6 days ago
Intersection
ovs-code
🥇
135
137ms
6 days ago
Tower of Hanoi
bitsandbeyond
131
110ms
8 days ago
Tower of Hanoi
ovs-code
💎
74
112ms
8 days ago
brainfuck
ovs-code
🥈
240
144ms
8 days ago
Tower of Hanoi
Natanaelel
🥈
81
110ms
9 days ago
Taxicab Numbers
ovs-code
93
361ms
9 days ago
Taxicab Numbers
Natanaelel
94
330ms
9 days ago
Fibonacci
Andrey2001
46
122ms
9 days ago
Taxicab Numbers
HumanoidCPU
4,656
111ms
9 days ago
Taxicab Numbers
Shanethegamer
4,656
105ms
10 days ago
Abundant Numbers
LeoVanderSteege
84
114ms
11 days ago
Tutorial
Natanaelel
94
120ms
11 days ago
Smooth Numbers
ovs-code
113
284ms
12 days ago
Smooth Numbers
Natanaelel
144
441ms
12 days ago
Tower of Hanoi
MeWhenI
111
109ms
12 days ago
Pangram Grep
Zach1031
175
113ms
13 days ago
Trinomial Triangle
scpchicken
198
113ms
14 days ago
Continued Fractions
ovs-code
156
133ms
15 days ago
ROT13
HumanoidCPU
182
124ms
15 days ago
Niven Numbers (Long)
HumanoidCPU
99
149ms
15 days ago
Niven Numbers
HumanoidCPU
97
108ms
15 days ago
Divisors
HumanoidCPU
78
109ms
15 days ago
Divisors
rniii
67
114ms
15 days ago
Evil Numbers (Long)
HumanoidCPU
81
112ms
16 days ago
Evil Numbers
HumanoidCPU
79
112ms
16 days ago
Fibonacci
solisolu
67
108ms
16 days ago
Odious Numbers (Long)
HumanoidCPU
80
130ms
16 days ago
Odious Numbers
HumanoidCPU
78
120ms
16 days ago
Collatz
Ibozz91
98
163ms
16 days ago
Continued Fractions
Natanaelel
199
135ms
17 days ago
Hilbert Curve
Natanaelel
1,250
160ms
20 days ago
Fibonacci
Zach1031
118
3,475ms
21 days ago
λ
JOrE20
1,067
106ms
22 days ago
Binary Lambda Calculus
Natanaelel
426
123ms
24 days ago
Divisors
jacekwladzinski
74
200ms
26 days ago
Minesweeper
moh-abb
236
240ms
27 days ago
brainfuck
moh-abb
538
180ms
27 days ago
Star Wars GPT
lynn
🥈
155
2,413ms
27 days ago
Fibonacci
cefqrn
39
104ms
27 days ago
Trinomial Triangle
MeWhenI
2,098
110ms
8 Nov 2025
Happy Numbers (Long)
dokutan
607
117ms
7 Nov 2025
Tower of Hanoi
HumanoidCPU
4,099
109ms
7 Nov 2025
Mandelbrot
lynn
💎
114
2,900ms
6 Nov 2025
99 Bottles of Beer
snoozingnewt
371
115ms
6 Nov 2025
Binary Lambda Calculus
CatsAreFluffy
407
115ms
6 Nov 2025
λ
ovs-code
💎
196
973ms
5 Nov 2025
Minesweeper
ovs-code
💎
162
164ms
5 Nov 2025
Game of Life
ovs-code
💎
141
120ms
5 Nov 2025
𝑒
JOrE20
1,067
108ms
3 Nov 2025
Card Number Validation
snoozingnewt
213
119ms
2 Nov 2025
Minesweeper
lynn
🥈
173
212ms
2 Nov 2025
Tower of Hanoi
Shanethegamer
102
114ms
2 Nov 2025
ROT13
snoozingnewt
159
131ms
2 Nov 2025
ASCII Table
snoozingnewt
164
112ms
2 Nov 2025
12 Days of Christmas
JOrE20
506
113ms
1 Nov 2025
Minesweeper
Natanaelel
187
227ms
1 Nov 2025
Set
snoozingnewt
187
167ms
30 Oct 2025