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
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99 Bottles of Beer
Abundant Numbers
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Arrows
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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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><>
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
γ
retrohun
1,014
10ms
3 days ago
Ten-pin Bowling
JOrE20
2,752
19ms
5 days ago
Partition Numbers
GolfingSuccess
🥉
76
37ms
18 days ago
Collatz
stellartux
125
21ms
18 days ago
Lucky Tickets
GolfingSuccess
109
19ms
20 days ago
Connect Four
IanUtley
🦄
332
283ms
24 days ago
Catalan Numbers
GolfingSuccess
🥉
50
10ms
25 days ago
ln 2
retrohun
1,014
10ms
26 days ago
γ
Haksell
1,014
10ms
26 days ago
Calendar
annaproxy
💎
297
27ms
28 May 2026
Gray Code Encoder
annaproxy
69
18ms
28 May 2026
Multitap Input
IanUtley
💎
114
18ms
25 May 2026
Multitap Input
annaproxy
🥈
137
16ms
24 May 2026
Leap Years
scpchicken
70
10ms
23 May 2026
Alphabetic Numbers
CaedenHarper
🥉
3,906
10ms
21 May 2026
Taxicab Numbers
oaiqjuy
🥈
236
40ms
19 May 2026
Leap Years
Steffan153
🥇
52
10ms
18 May 2026
π
hiichbindermax
296
19ms
18 May 2026
Fizz Buzz
hiichbindermax
133
10ms
18 May 2026
Collatz
scpchicken
95
113ms
17 May 2026
Pascal’s Triangle
LSWdigital
102
16ms
13 May 2026
Ulam Sequence
IanUtley
140
4,365ms
13 May 2026
Ulam Sequence
HumanoidCPU
1,104
10ms
12 May 2026
Alphabetic Numbers
KatieLG
4,909
9ms
12 May 2026
Alphabetic Numbers
dokutan
🥈
3,150
23ms
12 May 2026
Ulam Sequence
Shanethegamer
1,104
9ms
11 May 2026
Fibonacci
Herbert00709
160
9ms
8 May 2026
Kaprekar Numbers
IanUtley
💎
102
4,796ms
8 May 2026
Taxicab Numbers
dokutan
🥉
4,171
10ms
8 May 2026
Leap Years
Lydxn
🥇
52
10ms
7 May 2026
Fibonacci
Matter1024
62
10ms
4 May 2026
Fractions
Mikey-Beep
165
15ms
3 May 2026
PalindromemordnilaP
Mikey-Beep
185
16ms
3 May 2026
Odious Numbers (Long)
Mikey-Beep
74
10ms
3 May 2026
Odious Numbers
Mikey-Beep
72
9ms
3 May 2026
Evil Numbers (Long)
Mikey-Beep
74
9ms
3 May 2026
Evil Numbers
Mikey-Beep
72
9ms
3 May 2026
Pernicious Numbers (Long)
Mikey-Beep
89
21ms
3 May 2026
Pernicious Numbers
Mikey-Beep
78
15ms
3 May 2026
Pangram Grep
Mikey-Beep
155
16ms
3 May 2026
Arrows
Mikey-Beep
329
18ms
3 May 2026
24 Game
madeforlosers
12,443
11ms
1 May 2026
Arabic to Roman
ComradeSquirrel
280
36ms
29 Apr 2026
Christmas Trees
Mikey-Beep
262
15ms
29 Apr 2026
Day of Week
Mikey-Beep
90
18ms
29 Apr 2026
Taxicab Numbers
CaedenHarper
🥉
4,171
9ms
29 Apr 2026
Taxicab Numbers
IanUtley
💎
112
95ms
28 Apr 2026
Evil Numbers
sisyphus-ppcg
52
10ms
27 Apr 2026
Arrows
Steffan153
🥈
140
16ms
27 Apr 2026
Arrows
GolfingSuccess
653
17ms
27 Apr 2026
Tower of Hanoi
scpchicken
87
10ms
24 Apr 2026
Kolakoski Sequence
madeforlosers
2,011
9ms
24 Apr 2026
Pernicious Numbers (Long)
Steffan153
🥇
54
18ms
24 Apr 2026
Dragon Curve
HumanoidCPU
10,284
9ms
23 Apr 2026
Dragon Curve
Shanethegamer
10,284
10ms
23 Apr 2026
Evil Numbers
madeforlosers
81
9ms
23 Apr 2026
Fibonacci
madeforlosers
145
10ms
23 Apr 2026
Cubes
madeforlosers
4,112
9ms
22 Apr 2026
Odious Numbers
madeforlosers
84
9ms
22 Apr 2026
Evil Numbers (Long)
madeforlosers
1,961
10ms
22 Apr 2026
Farey Sequence
madeforlosers
4,365
10ms
22 Apr 2026
Odious Numbers (Long)
madeforlosers
1,956
9ms
22 Apr 2026
Abundant Numbers
madeforlosers
174
10ms
22 Apr 2026
Abundant Numbers (Long)
madeforlosers
975
10ms
22 Apr 2026
Prime Numbers
madeforlosers
82
9ms
22 Apr 2026
Look and Say
madeforlosers
1,290
10ms
22 Apr 2026
Prime Numbers (Long)
madeforlosers
5,959
10ms
22 Apr 2026
Divisors
madeforlosers
1,177
10ms
22 Apr 2026
Foo Fizz Buzz Bar
madeforlosers
5,730
10ms
22 Apr 2026
12 Days of Christmas
madeforlosers
2,380
9ms
22 Apr 2026
Tongue-twisters
madeforlosers
534
10ms
22 Apr 2026
Niven Numbers (Long)
madeforlosers
7,449
10ms
22 Apr 2026
Fizz Buzz
madeforlosers
424
10ms
22 Apr 2026
Tower of Hanoi
Mikey-Beep
105
11ms
21 Apr 2026
Alphabetic Numbers
IanUtley
💎
346
17ms
21 Apr 2026
Alphabetic Numbers
Shanethegamer
🥉
3,906
10ms
19 Apr 2026
Intersection
Mikey-Beep
179
16ms
19 Apr 2026
Scrambled Sort
Mikey-Beep
441
24ms
19 Apr 2026
Topological Sort
Mikey-Beep
🥉
259
23ms
19 Apr 2026
Card Number Validation
Mikey-Beep
344
17ms
19 Apr 2026
Tutorial
Mikey-Beep
74
18ms
19 Apr 2026
Leap Years
JayXon
🥇
52
10ms
18 Apr 2026
Recamán
Mikey-Beep
87
16ms
15 Apr 2026
Pascal’s Triangle
Mikey-Beep
169
14ms
15 Apr 2026
Fizz Buzz
Mikey-Beep
125
10ms
15 Apr 2026
Catalan Numbers
Mikey-Beep
84
10ms
15 Apr 2026
Niven Numbers
madeforlosers
57
10ms
13 Apr 2026
Kaprekar Numbers
DialFrost
🥈
108
2,626ms
13 Apr 2026
Factorial Factorisation
retrohun
876
10ms
11 Apr 2026
φ
Steffan153
51
2,365ms
2 Apr 2026
Gray Code Decoder
Steffan153
🥇
86
2,054ms
1 Apr 2026
CSS Colors
Steffan153
🥈
673
21ms
31 Mar 2026
Gray Code Encoder
Steffan153
🥇
59
18ms
31 Mar 2026
Continued Fractions
IanUtley
🥈
125
15ms
30 Mar 2026
ROT13
Steffan153
💎
99
15ms
25 Mar 2026
Continued Fractions
error256
💎
124
13ms
24 Mar 2026
Abundant Numbers
sean-niemann
73
9ms
22 Mar 2026
Continued Fractions
GolfingSuccess
🥉
145
17ms
21 Mar 2026
Collatz
madeforlosers
210
37ms
17 Mar 2026
Tower of Hanoi
AidanWalter
233
10ms
17 Mar 2026