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
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
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
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
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
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
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
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
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
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
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
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
Divisors
DialFrost
81
387ms
78 mins ago
12 Days of Christmas
sean-niemann
🥉
469
489ms
11 hours ago
Leyland Numbers
DialFrost
126
369ms
21 hours ago
Partition Numbers
DialFrost
92
379ms
22 hours ago
Topological Sort
emgordon154
🥈
170
2,637ms
27 hours ago
Roman to Arabic
blaztoma
174
191ms
2 days ago
Quine
JOrE20
136
226ms
3 days ago
Roman to Arabic
BREMAUCY
224
159ms
3 days ago
Trinomial Triangle
MeWhenI
2,099
369ms
3 days ago
Roman to Arabic
dokutan
236
646ms
3 days ago
Roman to Arabic
snoozingnewt
658
157ms
4 days ago
Roman to Arabic
bitsandbeyond
635
156ms
4 days ago
Roman to Arabic
KasperKivimaeki
137
387ms
4 days ago
Day of Week
dokutan
151
498ms
4 days ago
ROT13
dokutan
1,439
493ms
4 days ago
Rock-paper-scissors-Spock-lizard
dokutan
919
499ms
4 days ago
Number Spiral
dokutan
294
645ms
4 days ago
N Queens
dokutan
1,228
479ms
4 days ago
Musical Chords
dokutan
847
434ms
4 days ago
Morse Decoder
dokutan
915
492ms
4 days ago
Mandelbrot
dokutan
397
484ms
4 days ago
Levenshtein Distance
dokutan
112
521ms
4 days ago
Kolakoski Sequence
dokutan
277
496ms
4 days ago
Kaprekar Numbers
dokutan
472
390ms
4 days ago
Cubes
dokutan
599
472ms
4 days ago
Ascending Primes
dokutan
474
481ms
4 days ago
Arrows
dokutan
146
445ms
4 days ago
Forsyth–Edwards Notation
dokutan
493
478ms
4 days ago
CSS Colors
dokutan
4,308
489ms
4 days ago
Diamonds
dokutan
377
482ms
4 days ago
Factorial Factorisation
dokutan
847
481ms
4 days ago
Foo Fizz Buzz Bar
dokutan
142
406ms
4 days ago
Kolakoski Sequence
DialFrost
81
365ms
4 days ago
Tower of Hanoi
HumanoidCPU
3,609
379ms
4 days ago
Leyland Numbers
emgordon154
130
385ms
5 days ago
𝑒
JOrE20
1,044
149ms
8 days ago
Tower of Hanoi
Shanethegamer
83
362ms
8 days ago
United States
dokutan
232
448ms
9 days ago
Tower of Hanoi
bitsandbeyond
89
363ms
9 days ago
ROT13
snoozingnewt
155
154ms
9 days ago
ROT13
edsrzf
🥉
87
461ms
9 days ago
ASCII Table
snoozingnewt
169
434ms
9 days ago
Minesweeper
sean-niemann
🥈
169
391ms
10 days ago
Tower of Hanoi
rucin93
81
383ms
11 days ago
Tower of Hanoi
ovs-code
81
387ms
11 days ago
brainfuck
KasperKivimaeki
💎
195
394ms
11 days ago
Tower of Hanoi
KasperKivimaeki
81
367ms
11 days ago
Tower of Hanoi
sean-niemann
81
388ms
11 days ago
Pangram Grep
Babafaba
149
168ms
11 days ago
Mandelbrot
snoozingnewt
201
156ms
12 days ago
Tutorial
Openstreetmapler
252
177ms
12 days ago
Fibonacci
albanian-laundromat
79
162ms
12 days ago
Tower of Hanoi
albanian-laundromat
142
151ms
12 days ago
Kolakoski Sequence
snoozingnewt
131
365ms
12 days ago
Catalan Numbers
snoozingnewt
88
419ms
12 days ago
Ellipse Perimeters
Shanethegamer
110
452ms
14 days ago
Minesweeper
Shanethegamer
💎
158
415ms
15 days ago
Rijndael S-box
inventshah
128
420ms
17 days ago
Odious Numbers (Long)
snoozingnewt
79
413ms
17 days ago
Odious Numbers
snoozingnewt
78
395ms
17 days ago
Evil Numbers (Long)
snoozingnewt
78
385ms
17 days ago
Evil Numbers
snoozingnewt
76
415ms
17 days ago
Tongue-twisters
snoozingnewt
354
485ms
18 days ago
Hilbert Curve
snoozingnewt
💎
556
484ms
18 days ago
Pernicious Numbers
snoozingnewt
🥇
60
451ms
22 days ago
Fibonacci
snoozingnewt
66
399ms
23 days ago
DFA Simulator
snoozingnewt
🥉
220
554ms
24 days ago
Polyominoes
snoozingnewt
🥈
994
518ms
25 days ago
Foo Fizz Buzz Bar
snoozingnewt
169
429ms
26 days ago
Tutorial
luuumine
252
245ms
26 days ago
Tutorial
Babafaba
252
254ms
26 days ago
Leap Years
Yax42
72
481ms
27 days ago
Farey Sequence
snoozingnewt
141
374ms
27 days ago
Smith Numbers
snoozingnewt
172
536ms
13 Oct 2025
Van Eck Sequence
snoozingnewt
109
493ms
13 Oct 2025