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
12 Days of Christmas
BlankSpruce
🥈
562
4 hours ago
ln 2
DialFrost
💎
162
5 hours ago
τ
primo-ppcg
🥈
175
7 hours ago
π
primo-ppcg
🥈
175
7 hours ago
𝑒
primo-ppcg
🥇
157
7 hours ago
√2
primo-ppcg
💎
153
7 hours ago
φ
primo-ppcg
💎
156
7 hours ago
Tutorial
snoozingnewt
372
7 hours ago
λ
primo-ppcg
🥉
846
7 hours ago
Prime Numbers
primo-ppcg
🥈
131
7 hours ago
Pernicious Numbers (Long)
primo-ppcg
🥉
135
7 hours ago
Pernicious Numbers
primo-ppcg
🥈
117
7 hours ago
Pascal’s Triangle
primo-ppcg
🥉
177
8 hours ago
Odious Numbers (Long)
primo-ppcg
🥈
124
8 hours ago
Odious Numbers
primo-ppcg
🥈
123
8 hours ago
Niven Numbers
primo-ppcg
🥇
122
8 hours ago
Niven Numbers (Long)
primo-ppcg
139
8 hours ago
Leap Years
primo-ppcg
🥉
138
8 hours ago
Happy Numbers
primo-ppcg
🥈
153
8 hours ago
Fizz Buzz
primo-ppcg
183
8 hours ago
Fibonacci
primo-ppcg
🥉
135
8 hours ago
Evil Numbers (Long)
primo-ppcg
🥈
125
8 hours ago
Evil Numbers
primo-ppcg
125
8 hours ago
Emirp Numbers
primo-ppcg
🥈
176
8 hours ago
Divisors
primo-ppcg
🥉
142
8 hours ago
Diamonds
primo-ppcg
🥈
202
8 hours ago
Abundant Numbers (Long)
primo-ppcg
161
9 hours ago
99 Bottles of Beer
primo-ppcg
💎
388
9 hours ago
Abundant Numbers
primo-ppcg
160
9 hours ago
Pascal’s Triangle
DialFrost
🥈
165
9 hours ago
Number Spiral
Msleizak
873
9 hours ago
Vampire Numbers
emgordon154
💎
480
10 hours ago
Fizz Buzz
madex
272
10 hours ago
Prime Numbers (Long)
HumanoidCPU
151
10 hours ago
Partition Numbers
madex
251
10 hours ago
Tutorial
HumanoidCPU
181
10 hours ago
Pangram Grep
HumanoidCPU
276
10 hours ago
Happy Numbers (Long)
HumanoidCPU
🥉
284
11 hours ago
Pascal’s Triangle
HumanoidCPU
191
11 hours ago
Fizz Buzz
HumanoidCPU
188
11 hours ago
Prime Numbers
HumanoidCPU
144
11 hours ago
Fibonacci
HumanoidCPU
140
12 hours ago
Inventory Sequence
blaztoma
🥉
229
14 hours ago
Pangram Grep
blaztoma
368
14 hours ago
Fibonacci
plcc0
137
14 hours ago
Pascal’s Triangle
mlugg
199
15 hours ago
𝑒
JayXon
🥇
157
15 hours ago
λ
JayXon
🥈
632
15 hours ago
Zeckendorf Representation
JayXon
💎
237
15 hours ago
Van Eck Sequence
JayXon
💎
159
15 hours ago
Smith Numbers
JayXon
💎
209
15 hours ago
Rule 110
JayXon
💎
157
15 hours ago
ROT13
JayXon
💎
147
16 hours ago
Roman to Arabic
JayXon
💎
193
16 hours ago
Rijndael S-box
JayXon
💎
181
16 hours ago
𝑒
retrohun
1,133
16 hours ago
Recamán
JayXon
💎
157
16 hours ago
Evil Numbers
retrohun
233
16 hours ago
Prime Numbers (Long)
JayXon
💎
136
16 hours ago
Pernicious Numbers (Long)
JayXon
💎
130
16 hours ago
Pernicious Numbers
JayXon
💎
115
16 hours ago
Pascal’s Triangle
JayXon
💎
153
16 hours ago
Partition Numbers
JayXon
💎
155
16 hours ago
Odious Numbers (Long)
JayXon
💎
120
16 hours ago
Odious Numbers
JayXon
💎
117
16 hours ago
Niven Numbers (Long)
JayXon
🥇
138
16 hours ago
Niven Numbers
JayXon
🥇
122
16 hours ago
Lucky Tickets
JayXon
💎
266
16 hours ago
Lucky Numbers
JayXon
💎
172
16 hours ago
Leap Years
JayXon
💎
121
17 hours ago
Kolakoski Constant
JayXon
💎
201
17 hours ago
Kaprekar Numbers
JayXon
💎
158
17 hours ago
Inventory Sequence
JayXon
💎
160
17 hours ago
Intersection
JayXon
💎
270
17 hours ago
Happy Numbers (Long)
JayXon
💎
176
17 hours ago