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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
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
><>
ALGOL 68
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
ArkScript
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
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
ArkScript
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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
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
Chars
Time
Submitted
Gijswijt’s Sequence
anter69
105
1,274ms
8 hours ago
Continued Fractions
emgordon154
🥈
99
1,153ms
17 hours ago
Continued Fractions
Steffan153
💎
97
1,223ms
19 hours ago
Farey Sequence
anter69
68
1,248ms
29 hours ago
Continued Fractions
edsrzf
🥈
99
1,274ms
39 hours ago
Catalan Numbers
dokutan
66
1,236ms
2 days ago
brainfuck
anter69
266
1,376ms
2 days ago
Taxicab Numbers
anter69
81
1,245ms
2 days ago
Smith Numbers
anter69
105
1,401ms
3 days ago
Card Number Validation
anter69
71
1,213ms
3 days ago
Ten-pin Bowling
error256
123
1,270ms
4 days ago
Taxicab Numbers
stefangimmillaro
78
1,254ms
5 days ago
Fizz Buzz
JOrE20
86
1,301ms
6 days ago
Continued Fractions
stefangimmillaro
🥈
99
1,320ms
8 days ago
ln 2
JOrE20
1,009
1,487ms
10 days ago
Arrows
edsrzf
87
2,434ms
10 days ago
Time Distance
anter69
212
1,343ms
11 days ago
Van Eck Sequence
JOrE20
2,561
1,350ms
11 days ago
24 Game
anter69
171
3,763ms
12 days ago
τ
anter69
90
1,240ms
12 days ago
𝑒
anter69
80
1,260ms
12 days ago
π
anter69
90
1,288ms
12 days ago
Prime Numbers
DialFrost
39
1,313ms
13 days ago
Prime Numbers (Long)
DialFrost
40
1,285ms
13 days ago
N Queens
edsrzf
💎
90
1,363ms
13 days ago
Gray Code Encoder
pardouin
40
1,420ms
14 days ago
Calendar
emgordon154
186
1,427ms
14 days ago
Continued Fractions
pardouin
🥈
99
1,303ms
14 days ago
Gray Code Decoder
pardouin
45
1,189ms
14 days ago
Tutorial
janAkali
135
2,061ms
15 days ago
Billiards
edsrzf
🥈
118
1,369ms
15 days ago
Seven Segment
Steffan153
🥈
88
1,304ms
16 days ago
Ten-pin Bowling
Steffan153
🥇
96
1,277ms
17 days ago
Ten-pin Bowling
edsrzf
🥇
96
1,343ms
17 days ago
Musical Chords
Steffan153
100
1,270ms
17 days ago
Rijndael S-box
emgordon154
92
1,315ms
17 days ago
12 Days of Christmas
anter69
437
1,285ms
18 days ago
Farey Sequence
error256
75
1,251ms
18 days ago
Quine
CornerMercury
39
1,409ms
18 days ago
Diamonds
CornerMercury
1,110
1,300ms
18 days ago
Day of Week
anter69
55
1,384ms
19 days ago
√2
anter69
64
1,246ms
19 days ago
Divisors
Mefred
96
1,191ms
20 days ago
Diamonds
tomh1012
241
1,187ms
20 days ago
Partition Numbers
edsrzf
59
1,283ms
21 days ago
Multitap Input
error256
79
1,325ms
21 days ago
Pangram Grep
HumanoidCPU
84
1,438ms
21 days ago
Multitap Input
emgordon154
🥉
74
1,213ms
22 days ago
Look and Say
edsrzf
🥇
55
1,316ms
22 days ago
Pascal’s Triangle
edsrzf
57
1,266ms
23 days ago
Musical Chords
sean-niemann
101
1,369ms
23 days ago
Continued Fractions
anter69
🥈
99
1,252ms
25 days ago
Gray Code Decoder
anter69
47
1,189ms
25 days ago
Reverse Polish Notation
edsrzf
112
1,341ms
25 days ago
United States
JayXon
🥈
86
2,063ms
25 days ago
Prime Numbers (Long)
error256
🥇
39
1,348ms
25 days ago
Prime Numbers
error256
36
1,291ms
25 days ago
Tutorial
FortuiteMan
135
1,903ms
26 days ago
Diamonds
Andrey2001
1,109
1,255ms
27 days ago
brainfuck
emgordon154
191
1,319ms
27 days ago
Fizz Buzz
albanian-laundromat
66
1,322ms
27 days ago
United States
anter69
95
1,578ms
1 Feb 2026
π
JOrE20
1,009
1,287ms
1 Feb 2026
τ
JOrE20
1,009
1,263ms
1 Feb 2026
Multitap Input
dokutan
432
1,283ms
1 Feb 2026
Christmas Trees
mwarvik
605
1,280ms
1 Feb 2026
Christmas Trees
h3ra993huskp
103
1,262ms
1 Feb 2026
Christmas Trees
qpwoeirut
106
1,260ms
31 Jan 2026
Christmas Trees
vhoulbreque
929
1,254ms
31 Jan 2026
Christmas Trees
jared-hughes
77
1,262ms
31 Jan 2026
PalindromemordnilaP
edsrzf
🥈
52
1,291ms
31 Jan 2026
Christmas Trees
Mefred
112
1,252ms
30 Jan 2026
Hexdump
edsrzf
🥉
119
1,485ms
30 Jan 2026
Rock-paper-scissors-Spock-lizard
error256
169
1,990ms
30 Jan 2026
Christmas Trees
kmathis22
96
1,201ms
30 Jan 2026
Ascending Primes
anter69
80
1,725ms
30 Jan 2026
Christmas Trees
plcc0
65
1,255ms
30 Jan 2026
Multitap Input
pardouin
🥇
64
1,286ms
30 Jan 2026
Calendar
edsrzf
💎
155
1,509ms
30 Jan 2026
Ten-pin Bowling
JayXon
🥉
98
1,258ms
30 Jan 2026