The
Nim
hole will go live in approximately
2 days
. Why not try and solve it ahead of time?
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12 Days of Christmas
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brainfuck
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Catalan’s Constant
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Continued Fractions
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Day of Week
DFA Simulator
Diamonds
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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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><>
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
Nim
antimon2
82
726ms
79 mins ago
Pernicious Numbers
prestosilver
67
203ms
7 hours ago
Nim
dokutan
113
291ms
23 hours ago
Fractions
denkyuu1
61
335ms
25 hours ago
Chess960 Encoder
Shanethegamer
203
301ms
2 days ago
Prime Numbers
sacredeux
70
203ms
2 days ago
Pernicious Numbers
FortuiteMan
50
332ms
2 days ago
Pernicious Numbers
sacredeux
58
341ms
2 days ago
Pernicious Numbers
blaztoma
37
296ms
4 days ago
Sierpiński Triangle
HPWiz
🥉
53
1,829ms
4 days ago
γ
retrohun
1,011
190ms
4 days ago
Pernicious Numbers
Openstreetmapler
53
272ms
4 days ago
ln 2
Codsilla
41
314ms
5 days ago
γ
Codsilla
🥇
42
265ms
5 days ago
Pernicious Numbers
error256
41
408ms
5 days ago
Pernicious Numbers
Matter1024
43
383ms
5 days ago
Pernicious Numbers
bitsandbeyond
41
236ms
6 days ago
Pernicious Numbers
BREMAUCY
108
196ms
6 days ago
Pernicious Numbers (Long)
Andriamanitra
59
265ms
6 days ago
Pernicious Numbers
Andriamanitra
47
354ms
6 days ago
Hexdump
antimon2
🥉
156
964ms
6 days ago
λ
zzh1996
155
644ms
7 days ago
γ
zzh1996
🥇
42
286ms
7 days ago
Seven Segment
antimon2
🥈
86
804ms
17 days ago
Intersection
denkyuu1
110
322ms
17 days ago
Odious Numbers (Long)
denkyuu1
40
364ms
17 days ago
Rock-paper-scissors-Spock-lizard
antimon2
🥉
191
410ms
20 days ago
Connect Four
antimon2
💎
155
1,210ms
24 days ago
Connect Four
Shanethegamer
🥈
200
635ms
24 days ago
ln 2
yzhs
53
2,223ms
24 days ago
Topological Sort
ovs-code
140
983ms
26 days ago
Recamán
denkyuu1
77
372ms
26 days ago
ln 2
retrohun
1,011
235ms
27 days ago
γ
Haksell
1,011
240ms
27 days ago
Set
denkyuu1
213
1,051ms
30 May 2026
Rock-paper-scissors-Spock-lizard
denkyuu1
219
529ms
30 May 2026
Look and Say
denkyuu1
108
748ms
29 May 2026
Leap Years
RealBen9
47
402ms
29 May 2026
Snake
Shanethegamer
149
495ms
28 May 2026
Tower of Hanoi
denkyuu1
51
398ms
26 May 2026
Pernicious Numbers (Long)
denkyuu1
51
427ms
25 May 2026
Pernicious Numbers
denkyuu1
39
400ms
25 May 2026
Odious Numbers
denkyuu1
38
486ms
25 May 2026
Evil Numbers
denkyuu1
38
434ms
25 May 2026
γ
codereport
🥇
42
246ms
24 May 2026
Sudoku (Fill-in)
codereport
206
749ms
24 May 2026
Alphabetic Numbers
CaedenHarper
3,903
154ms
21 May 2026
Divisors
Orsailius
56
368ms
20 May 2026
24 Game
dokutan
259
2,535ms
19 May 2026
γ
oaiqjuy
59
2,261ms
19 May 2026
τ
oaiqjuy
50
216ms
19 May 2026
Catalan’s Constant
oaiqjuy
66
245ms
19 May 2026
Gray Code Encoder
oaiqjuy
🥇
53
454ms
19 May 2026
Leap Years
Steffan153
🥇
32
330ms
18 May 2026
Rectangle Fill
Shanethegamer
135
970ms
17 May 2026
Odious Numbers
HumanoidCPU
41
333ms
17 May 2026
Evil Numbers
HumanoidCPU
41
300ms
17 May 2026
Evil Numbers (Long)
HumanoidCPU
43
327ms
17 May 2026
Odious Numbers (Long)
HumanoidCPU
43
363ms
17 May 2026
Alphabetic Numbers
ovs-code
🥈
111
1,467ms
16 May 2026
Leap Years
denkyuu1
40
418ms
16 May 2026
Alphabetic Numbers
antimon2
💎
107
1,630ms
16 May 2026
Spelling Numbers
antimon2
💎
255
1,555ms
16 May 2026
Fibonacci
Orsailius
40
755ms
16 May 2026
Tongue-twisters
prestosilver
531
239ms
15 May 2026
Topological Sort
scpchicken
🥉
109
1,607ms
14 May 2026
Gray Code Decoder
Shanethegamer
57
448ms
14 May 2026
Star Wars GPT
denkyuu1
140
1,901ms
14 May 2026
Morse Encoder
dokutan
175
391ms
14 May 2026
Ulam Sequence
HumanoidCPU
1,101
166ms
12 May 2026
γ
rkg-huwdu
60
241ms
12 May 2026
Alphabetic Numbers
KatieLG
3,094
166ms
12 May 2026
Alphabetic Numbers
dokutan
🥉
1,918
267ms
12 May 2026
Ulam Sequence
Shanethegamer
1,101
199ms
11 May 2026
99 Bottles of Beer
denkyuu1
357
269ms
10 May 2026
Number Spiral
denkyuu1
198
574ms
10 May 2026
Leyland Numbers
denkyuu1
62
607ms
10 May 2026
Catalan Numbers
denkyuu1
42
303ms
10 May 2026
Prime Numbers
denkyuu1
39
291ms
10 May 2026
Diamonds
denkyuu1
105
595ms
8 May 2026
Cubes
denkyuu1
210
631ms
8 May 2026
Factorial Factorisation
denkyuu1
94
397ms
8 May 2026
Taxicab Numbers
Andriamanitra
123
678ms
7 May 2026
Quine
GolfingSuccess
🥇
32
372ms
7 May 2026
Leap Years
Lydxn
🥇
32
321ms
7 May 2026
Niven Numbers
HumanoidCPU
44
412ms
5 May 2026
Niven Numbers (Long)
HumanoidCPU
46
446ms
5 May 2026
τ
aksyristos
48
215ms
5 May 2026
𝑒
aksyristos
47
202ms
5 May 2026
π
aksyristos
46
203ms
5 May 2026
φ
aksyristos
64
211ms
5 May 2026
Catalan’s Constant
aksyristos
65
253ms
5 May 2026
ISBN
HumanoidCPU
98
371ms
3 May 2026
24 Game
madeforlosers
12,440
181ms
1 May 2026
Taxicab Numbers
dokutan
4,168
169ms
1 May 2026
Quine
aksyristos
🥇
32
376ms
30 Apr 2026
Taxicab Numbers
madex
111
492ms
29 Apr 2026
ln 2
scpchicken
🥇
40
2,350ms
29 Apr 2026
Taxicab Numbers
CaedenHarper
4,168
175ms
29 Apr 2026
Dragon Curve
dokutan
15,315
377ms
28 Apr 2026