The
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hole will go live in approximately
6 days
. Why not try and solve it ahead of time?
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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
Chess Move Validation
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
Nim
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
Ulam Sequence
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
Langton’s Ant
Lyndon Factorization
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Thue–Morse Constant
Turtle
Tutorial
Yellowstone Permutation
Hole
Golfer
Bytes
Time
Submitted
Gray Code Decoder
JOrE20
🥇
83
378ms
10 hours ago
Gray Code Decoder
ovs-code
49
114ms
15 hours ago
Gray Code Decoder
Europe2048
53
113ms
16 hours ago
Gray Code Decoder
smclaughlin-cf
66
14ms
34 hours ago
Gray Code Decoder
andrewjc2000
77
17ms
2 days ago
Gray Code Decoder
Europe2048
53
6ms
2 days ago
Gray Code Decoder
Europe2048
12
357ms
2 days ago
Gray Code Decoder
zzh1996
🥇
83
367ms
2 days ago
Gray Code Decoder
zzh1996
🥈
70
7ms
2 days ago
Gray Code Decoder
nickweissert-star
57
264ms
3 days ago
Gray Code Decoder
JOrE20
🥈
17,354
44ms
3 days ago
Gray Code Decoder
vlpx
48
11ms
3 days ago
Gray Code Decoder
michelebastione
90
415ms
4 days ago
Gray Code Decoder
Europe2048
37
8ms
4 days ago
Gray Code Decoder
bpharaldsson
100
369ms
7 days ago
Gray Code Decoder
albanian-laundromat
96
300ms
8 days ago
Gray Code Decoder
HumanoidCPU
100
3ms
9 days ago
Gray Code Decoder
zzh1996
81
504ms
9 days ago
Gray Code Decoder
christos-cantina-security
🥇
6
40ms
10 days ago
Gray Code Decoder
christos-cantina-security
52
46ms
10 days ago
Gray Code Decoder
Flekay
77
19ms
13 days ago
Gray Code Decoder
ovs-code
💎
68
130ms
14 days ago
Gray Code Decoder
kkoenig
🥉
117
289ms
14 days ago
Gray Code Decoder
jordansafer
79
17ms
14 days ago
Gray Code Decoder
Yax42
60
10ms
15 days ago
Gray Code Decoder
Steffan153
🥇
66
428ms
16 days ago
Gray Code Decoder
JOrE20
67
155ms
19 days ago
Gray Code Decoder
kasarino
153
275ms
21 days ago
Gray Code Decoder
tomh1012
62
34ms
22 days ago
Gray Code Decoder
albanian-laundromat
76
7ms
24 days ago
Gray Code Decoder
albanian-laundromat
🥇
78
156ms
24 days ago
Gray Code Decoder
sean-niemann
💎
75
200ms
24 days ago
Gray Code Decoder
albanian-laundromat
191
1,596ms
24 days ago
Gray Code Decoder
albanian-laundromat
🥈
80
45ms
24 days ago
Gray Code Decoder
albanian-laundromat
51
43ms
26 days ago
Gray Code Decoder
ryyyn
76
127ms
27 Aug 2026
Gray Code Decoder
stellartux
62
9ms
26 Aug 2026
Gray Code Decoder
MostParsingVex
98
67ms
25 Aug 2026
Gray Code Decoder
MostParsingVex
78
3ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
74
16ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
🥇
109
63ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
🥉
87
1,491ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
101
160ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
🥇
83
405ms
25 Aug 2026
Gray Code Decoder
albanian-laundromat
🥉
71
414ms
22 Aug 2026
Gray Code Decoder
albanian-laundromat
💎
247
37ms
20 Aug 2026
Gray Code Decoder
JOrE20
128
73ms
20 Aug 2026
Gray Code Decoder
LostSyntax21
🥈
248
26ms
20 Aug 2026
Gray Code Decoder
Europe2048
60
31ms
20 Aug 2026
Gray Code Decoder
albanian-laundromat
🥉
117
281ms
20 Aug 2026
Gray Code Decoder
jenova-gemini
77
18ms
19 Aug 2026
Gray Code Decoder
emplv
🥈
61
7ms
18 Aug 2026
Gray Code Decoder
KasperKivimaeki
🥉
117
338ms
14 Aug 2026
Gray Code Decoder
albanian-laundromat
🥇
96
36ms
12 Aug 2026
Gray Code Decoder
scpchicken
🥇
18
84ms
10 Aug 2026
Gray Code Decoder
acotis
🥇
96
162ms
5 Aug 2026
Gray Code Decoder
JOrE20
134
173ms
5 Aug 2026
Gray Code Decoder
scpchicken
🥉
912
2,170ms
4 Aug 2026
Gray Code Decoder
Alex-x90
76
3ms
4 Aug 2026
Gray Code Decoder
edsrzf
🥇
44
1,165ms
3 Aug 2026
Gray Code Decoder
jared-hughes
💎
151
209ms
2 Aug 2026
Gray Code Decoder
JOrE20
🥇
35
61ms
1 Aug 2026
Gray Code Decoder
emgordon154
🥉
80
481ms
31 Jul 2026
Gray Code Decoder
Waffle3z
68
10ms
30 Jul 2026
Gray Code Decoder
scpchicken
🥇
43
30ms
30 Jul 2026
Gray Code Decoder
Steffan153
🥇
43
30ms
30 Jul 2026
Gray Code Decoder
Steffan153
🥇
44
1,176ms
30 Jul 2026
Gray Code Decoder
Steffan153
🥇
59
860ms
30 Jul 2026
Gray Code Decoder
Steffan153
🥇
69
495ms
30 Jul 2026
Gray Code Decoder
albanian-laundromat
92
19ms
29 Jul 2026
Gray Code Decoder
scpchicken
🥇
30
25ms
29 Jul 2026
Gray Code Decoder
scpchicken
70
285ms
29 Jul 2026
Gray Code Decoder
dokutan
143
412ms
27 Jul 2026
Gray Code Decoder
jipsong
79
8ms
27 Jul 2026
Gray Code Decoder
albanian-laundromat
🥇
68
607ms
27 Jul 2026
Gray Code Decoder
dokutan
61
34ms
26 Jul 2026
Gray Code Decoder
jipsong
🥇
68
640ms
26 Jul 2026
Gray Code Decoder
jipsong
🥇
53
2,213ms
26 Jul 2026
Gray Code Decoder
JOrE20
🥇
30
24ms
26 Jul 2026
Gray Code Decoder
JOrE20
70
140ms
26 Jul 2026
Gray Code Decoder
JOrE20
🥇
43
30ms
26 Jul 2026
Gray Code Decoder
JOrE20
11
192ms
26 Jul 2026
Gray Code Decoder
NameRandomString
117
112ms
25 Jul 2026
Gray Code Decoder
ovs-code
90
516ms
23 Jul 2026
Gray Code Decoder
jipsong
77
18ms
22 Jul 2026
Gray Code Decoder
jipsong
47
1,292ms
22 Jul 2026
Gray Code Decoder
Mukundan314
💎
47
442ms
21 Jul 2026
Gray Code Decoder
solisolu
50
40ms
20 Jul 2026
Gray Code Decoder
CornerMercury
9
431ms
19 Jul 2026
Gray Code Decoder
codewrite
136
430ms
17 Jul 2026
Gray Code Decoder
albanian-laundromat
47
12ms
14 Jul 2026
Gray Code Decoder
albanian-laundromat
🥇
43
5ms
12 Jul 2026
Gray Code Decoder
rainruse
80
9ms
12 Jul 2026
Gray Code Decoder
Arkadios200
132
2,418ms
11 Jul 2026
Gray Code Decoder
Arkadios200
93
98ms
11 Jul 2026
Gray Code Decoder
EasyBF-Compiler
78
17ms
10 Jul 2026
Gray Code Decoder
EasyBF-Compiler
51
29ms
10 Jul 2026
Gray Code Decoder
Steffan153
🥇
47
9ms
10 Jul 2026
Gray Code Decoder
edsrzf
55
16ms
9 Jul 2026
Gray Code Decoder
edsrzf
🥇
34
1,396ms
9 Jul 2026