The
Nim
hole will go live in approximately
4 days
. Why not try and solve it ahead of time?
Recent Solutions
Achievements
Cheevos
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Connect Four
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)
Taxicab Numbers
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
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Ulam Sequence
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brainfuck
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iogii
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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
iogii
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
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
ZuzuScript
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Alphabetic Numbers
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Connect Four
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)
Taxicab Numbers
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
Chess960 Decoder
Chess960 Encoder
Crossword
CSS Colors (Inverse)
CSS Grid
Dragon Curve
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
Huffman Encoder
NFA Simulator
Nim
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Turtle
Tutorial
Ulam Sequence
Hole
Golfer
Bytes
Time
Submitted
π
JOrE20
36
69ms
41 hours ago
Pernicious Numbers
JOrE20
17
45ms
43 hours ago
Gray Code Encoder
JOrE20
23
92ms
43 hours ago
Gray Code Encoder
Pyroan
21
95ms
2 days ago
γ
retrohun
1,004
40ms
2 days ago
Odious Numbers (Long)
CaedenHarper
18
49ms
2 days ago
Odious Numbers
CaedenHarper
17
39ms
2 days ago
Evil Numbers
CaedenHarper
18
38ms
2 days ago
ln 2
JOrE20
33
101ms
2 days ago
Apéry’s Constant
JOrE20
41
55ms
3 days ago
Polyominoes
zzh1996
99
2,343ms
4 days ago
Farey Sequence
zzh1996
🥉
24
50ms
5 days ago
Gijswijt’s Sequence
JOrE20
145
43ms
5 days ago
Fractions
zzh1996
🥇
15
56ms
6 days ago
Sudoku
zzh1996
258
100ms
6 days ago
Intersection
zzh1996
🥇
29
61ms
6 days ago
Tutorial
local-furry-robot
29
59ms
6 days ago
DFA Simulator
codereport
🥇
58
69ms
6 days ago
Ten-pin Bowling
zzh1996
79
46ms
7 days ago
Sudoku (Fill-in)
codereport
🥉
99
233ms
7 days ago
Sudoku
codereport
🥉
225
87ms
8 days ago
Star Wars Opening Crawl
codereport
🥈
100
47ms
12 days ago
Odious Numbers (Long)
JOrE20
18
50ms
12 days ago
Odious Numbers
JOrE20
17
49ms
12 days ago
Tutorial
webmaker-dot
30
61ms
13 days ago
Mandelbrot
CaedenHarper
🥈
78
4,342ms
14 days ago
United States
CaedenHarper
145
54ms
15 days ago
Sudoku (Fill-in)
CaedenHarper
182
74ms
15 days ago
Sudoku
CaedenHarper
345
99ms
15 days ago
Hilbert Curve
CaedenHarper
568
79ms
15 days ago
24 Game
CaedenHarper
379
109ms
15 days ago
Poker
CaedenHarper
246
150ms
15 days ago
λ
CaedenHarper
148
245ms
15 days ago
γ
CaedenHarper
70
953ms
15 days ago
Mahjong
CaedenHarper
253
180ms
15 days ago
Look and Say
CaedenHarper
46
64ms
15 days ago
Cubes
CaedenHarper
160
53ms
15 days ago
Set
CaedenHarper
58
505ms
15 days ago
Polyominoes
CaedenHarper
180
139ms
15 days ago
Star Wars Opening Crawl
CaedenHarper
203
57ms
15 days ago
Musical Chords
CaedenHarper
78
66ms
15 days ago
Ten-pin Bowling
CaedenHarper
99
54ms
16 days ago
Hexdump
CaedenHarper
133
59ms
16 days ago
Proximity Grid
CaedenHarper
89
250ms
16 days ago
Zodiac Signs
CaedenHarper
113
78ms
16 days ago
Time Distance
CaedenHarper
179
56ms
16 days ago
QR Decoder
CaedenHarper
111
44ms
16 days ago
Star Wars GPT
CaedenHarper
68
109ms
16 days ago
Gijswijt’s Sequence
CaedenHarper
91
1,306ms
16 days ago
Medal Tally
CaedenHarper
84
84ms
16 days ago
Reversi
CaedenHarper
136
226ms
16 days ago
Maze
CaedenHarper
125
221ms
16 days ago
Van Eck Sequence
CaedenHarper
18
79ms
16 days ago
Morse Decoder
CaedenHarper
107
87ms
16 days ago
Connect Four
CaedenHarper
🥉
144
528ms
16 days ago
99 Bottles of Beer
JOrE20
202
86ms
16 days ago
Tutorial
LaconicLuna
121
60ms
17 days ago
Mahjong
codereport
🥉
124
3,219ms
18 days ago
Musical Chords
codereport
63
53ms
19 days ago
Collatz
Herbert00709
32
442ms
20 days ago
Emirp Numbers
ovs-code
35
114ms
22 days ago
Fractions
scpchicken
18
46ms
23 days ago
Happy Numbers
Haksell
108
59ms
24 days ago
Jacobi Symbol
codereport
52
85ms
25 days ago
Farey Sequence
codereport
🥉
24
76ms
25 days ago
Connect Four
MeWhenI
🥈
139
308ms
25 days ago
ln 2
retrohun
1,008
41ms
25 days ago
γ
Haksell
1,004
41ms
26 days ago
Kolakoski Sequence
scpchicken
39
56ms
26 days ago
Connect Four
saito-ta
💎
105
462ms
26 days ago
Fractions
codereport
🥇
15
69ms
27 days ago
Farey Sequence
Steffan153
🥉
24
54ms
29 May 2026
Lucky Tickets
Steffan153
27
45ms
28 May 2026
brainfuck
codereport
🥈
52
80ms
28 May 2026
Reverse Polish Notation
darrenks
🥇
4
53ms
26 May 2026
DFA Simulator
MeWhenI
72
60ms
25 May 2026
Reverse Polish Notation
codereport
🥇
4
51ms
25 May 2026
Pascal’s Triangle
Steffan153
🥇
23
42ms
24 May 2026
Trinomial Triangle
Steffan153
🥇
26
44ms
24 May 2026
Fibonacci
Dominoscompute
14
42ms
24 May 2026
Leap Years
scpchicken
29
43ms
23 May 2026
Kolakoski Sequence
ovs-code
💎
25
52ms
23 May 2026
Levenshtein Distance
CaedenHarper
68
47ms
22 May 2026
Medal Tally
oaiqjuy
75
70ms
21 May 2026
Gray Code Decoder
oaiqjuy
🥇
18
83ms
21 May 2026
Zeckendorf Representation
oaiqjuy
40
67ms
21 May 2026
Gray Code Encoder
oaiqjuy
21
98ms
21 May 2026
DFA Simulator
oaiqjuy
99
67ms
21 May 2026
Minesweeper
oaiqjuy
66
185ms
21 May 2026
Diamonds
MeWhenI
35
44ms
21 May 2026
Alphabetic Numbers
saito-ta
🥈
82
71ms
21 May 2026
Kaprekar Numbers
MeWhenI
171
4,989ms
21 May 2026
Gijswijt’s Sequence
MeWhenI
🥉
48
3,225ms
21 May 2026
SI Units
MeWhenI
🥉
421
748ms
21 May 2026
Mahjong
MeWhenI
192
3,709ms
21 May 2026
Calendar
MeWhenI
🥉
153
392ms
21 May 2026
Morse Decoder
vang1ong7ang
💎
81
43ms
21 May 2026
Spelling Numbers
vang1ong7ang
🥉
257
82ms
21 May 2026
CSS Colors
vang1ong7ang
🥇
550
48ms
21 May 2026
Time Distance
vang1ong7ang
🥉
166
58ms
21 May 2026