The
Nim
hole will go live in approximately
3 days
. Why not try and solve it ahead of time?
Recent Solutions
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Cheevos
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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
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Arrows
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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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><>
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
Arabic to Roman
Steffan153
🥇
159
36ms
47 hours ago
Farey Sequence
edsrzf
83
29ms
2 days ago
γ
retrohun
1,019
24ms
3 days ago
Arabic to Roman
edsrzf
🥇
159
36ms
4 days ago
Niven Numbers
albanian-laundromat
🥇
63
28ms
4 days ago
Leap Years
denkyuu1
95
30ms
4 days ago
Pangram Grep
edsrzf
🥈
116
28ms
5 days ago
Inventory Sequence
edsrzf
115
32ms
5 days ago
Look and Say
edsrzf
🥈
123
221ms
5 days ago
Foo Fizz Buzz Bar
edsrzf
128
28ms
5 days ago
Fizz Buzz
edsrzf
🥇
99
27ms
5 days ago
Vampire Numbers
edsrzf
💎
217
396ms
5 days ago
CSS Colors
m-tkach
🥈
710
37ms
5 days ago
Medal Tally
edsrzf
🥈
217
36ms
6 days ago
Ten-pin Bowling
edsrzf
💎
271
42ms
6 days ago
Pernicious Numbers (Long)
Steffan153
💎
74
30ms
6 days ago
Odious Numbers (Long)
Steffan153
🥇
68
27ms
7 days ago
Evil Numbers (Long)
Steffan153
🥇
66
27ms
7 days ago
Odious Numbers
edsrzf
67
27ms
7 days ago
Odious Numbers (Long)
edsrzf
🥇
68
28ms
7 days ago
Evil Numbers (Long)
edsrzf
🥇
66
30ms
7 days ago
Evil Numbers
edsrzf
65
33ms
7 days ago
Reverse Polish Notation
edsrzf
🥇
185
37ms
7 days ago
Tower of Hanoi
edsrzf
85
29ms
7 days ago
Mandelbrot
edsrzf
🥇
192
306ms
7 days ago
Mandelbrot
error256
🥇
192
338ms
7 days ago
Transpose Sentence
Steffan153
🥈
122
92ms
7 days ago
Connect Four
edsrzf
🦄
289
48ms
7 days ago
Reverse Polish Notation
Steffan153
🥇
185
36ms
7 days ago
Musical Chords
Steffan153
🥈
185
36ms
7 days ago
Hexdump
edsrzf
💎
238
36ms
7 days ago
Scrambled Sort
edsrzf
💎
142
35ms
7 days ago
DFA Simulator
edsrzf
💎
223
83ms
7 days ago
SI Units
edsrzf
💎
624
465ms
7 days ago
Musical Chords
edsrzf
💎
183
35ms
7 days ago
Transpose Sentence
edsrzf
💎
121
44ms
7 days ago
Fibonacci
scpchicken
🥇
54
28ms
8 days ago
Arrows
edsrzf
🥈
141
42ms
9 days ago
Kaprekar Numbers
edsrzf
💎
105
1,354ms
10 days ago
Seven Segment
siarie
274
31ms
16 days ago
Calendar
scpchicken
💎
336
39ms
17 days ago
Catalan’s Constant
Steffan153
💎
188
215ms
17 days ago
√2
Steffan153
💎
165
236ms
17 days ago
φ
Steffan153
💎
163
126ms
17 days ago
ln 2
Steffan153
💎
153
285ms
17 days ago
τ
Steffan153
💎
164
293ms
17 days ago
π
Steffan153
💎
164
237ms
17 days ago
𝑒
Steffan153
💎
129
72ms
17 days ago
Rectangle Fill
Shanethegamer
232
42ms
21 days ago
CSS Colors
edsrzf
💎
709
38ms
21 days ago
Gray Code Decoder
Shanethegamer
131
33ms
25 days ago
ln 2
retrohun
1,017
24ms
26 days ago
γ
Haksell
1,016
24ms
27 days ago
Topological Sort
albanian-laundromat
262
2,014ms
26 May 2026
Polyominoes
aksyristos
3,577
24ms
25 May 2026
Abundant Numbers
edsrzf
99
30ms
25 May 2026
Abundant Numbers (Long)
edsrzf
100
38ms
25 May 2026
Polyominoes
albanian-laundromat
💎
399
53ms
23 May 2026
Alphabetic Numbers
CaedenHarper
3,908
23ms
21 May 2026
Alphabetic Numbers
edsrzf
💎
209
34ms
20 May 2026
Alphabetic Numbers
scpchicken
🥈
310
36ms
20 May 2026
λ
aksyristos
1,016
24ms
19 May 2026
N Queens
oaiqjuy
🥉
214
34ms
19 May 2026
Trinomial Triangle
oaiqjuy
159
31ms
19 May 2026
Alphabetic Numbers
oaiqjuy
🥉
563
37ms
19 May 2026
Flags
Shanethegamer
6,200
67ms
19 May 2026
Leap Years
Steffan153
🥇
58
28ms
18 May 2026
Sudoku (Fill-in)
albanian-laundromat
💎
370
53ms
18 May 2026
Tongue-twisters
prestosilver
536
23ms
15 May 2026
Quine
scpchicken
🥇
66
28ms
15 May 2026
Ascending Primes
Steffan153
🥇
125
4,779ms
14 May 2026
Odious Numbers
roupiq
82
31ms
13 May 2026
Ulam Sequence
HumanoidCPU
1,106
23ms
12 May 2026
Alphabetic Numbers
KatieLG
3,908
24ms
12 May 2026
Alphabetic Numbers
dokutan
3,111
178ms
12 May 2026
Ulam Sequence
Shanethegamer
1,106
24ms
11 May 2026
Evil Numbers
siarie
114
28ms
11 May 2026
Foo Fizz Buzz Bar
siarie
168
29ms
11 May 2026
Taxicab Numbers
edsrzf
🥇
134
117ms
10 May 2026
Taxicab Numbers
Steffan153
🥇
134
116ms
9 May 2026
Prime Numbers
siarie
266
31ms
8 May 2026
ASCII Table
siarie
200
34ms
8 May 2026
Taxicab Numbers
dokutan
🥉
3,333
252ms
8 May 2026
Leap Years
JayXon
🥇
58
27ms
7 May 2026
Leap Years
Lydxn
🥇
58
28ms
7 May 2026
Fibonacci
snoozingnewt
🥇
54
29ms
5 May 2026
Niven Numbers (Long)
HumanoidCPU
175
37ms
5 May 2026
Niven Numbers (Long)
edsrzf
🥇
79
30ms
5 May 2026
Continued Fractions
albanian-laundromat
🥉
186
34ms
4 May 2026
Fibonacci
Matter1024
80
27ms
4 May 2026
Arrows
Steffan153
💎
140
36ms
3 May 2026
Ordinal Numbers
Steffan153
💎
113
28ms
1 May 2026
24 Game
madeforlosers
12,445
26ms
1 May 2026
Quine
aksyristos
🥇
66
28ms
1 May 2026
Nim
Shanethegamer
161
35ms
30 Apr 2026
Taxicab Numbers
CaedenHarper
4,173
26ms
29 Apr 2026
Nim
edsrzf
150
32ms
28 Apr 2026
Tutorial
siarie
207
39ms
28 Apr 2026
Catalan Numbers
Steffan153
💎
209
32ms
25 Apr 2026
Continued Fractions
edsrzf
🥇
133
33ms
25 Apr 2026