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12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
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ASCII Table
Billiards
brainfuck
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
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
Happy Numbers
Happy Numbers (Long)
Hexdump
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Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
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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
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
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Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
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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)
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
Calendar
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
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Numbrix
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p-adic Expansion
Polygon Triangulations
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Semiprime Numbers
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Tutorial
Hole
Golfer
Bytes
Time
Submitted
Polyominoes
tomh1012
648
411ms
41 hours ago
Polyominoes
snoozingnewt
💎
338
103ms
4 days ago
Polyominoes
dokutan
🥉
933
65ms
5 days ago
Polyominoes
dokutan
947
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Polyominoes
MeWhenI
208
58ms
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Polyominoes
kurkale6ka
3,576
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Polyominoes
albanian-laundromat
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dokutan
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887
790ms
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Polyominoes
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🥉
519
255ms
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Polyominoes
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239
24ms
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Polyominoes
kg583
💎
336
185ms
8 days ago
Polyominoes
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🥉
287
1,045ms
8 days ago
Polyominoes
HumanoidCPU
7,410
7ms
11 days ago
Polyominoes
HumanoidCPU
11,160
9ms
11 days ago
Polyominoes
HumanoidCPU
3,617
273ms
11 days ago
Polyominoes
HumanoidCPU
9,837
33ms
12 days ago
Polyominoes
HumanoidCPU
11,871
15ms
12 days ago
Polyominoes
HumanoidCPU
3,572
2ms
13 days ago
Polyominoes
JOrE20
3,569
3ms
13 days ago
Polyominoes
blaztoma
🥈
380
119ms
13 days ago
Polyominoes
Shanethegamer
3,584
104ms
14 days ago
Polyominoes
Carlos-EAC
4,709
3,650ms
14 days ago
Polyominoes
Carlos-EAC
4,835
2ms
14 days ago
Polyominoes
targrik
🥉
312
53ms
14 days ago
Polyominoes
Carlos-EAC
4,837
11ms
15 days ago
Polyominoes
dokutan
🥈
910
3ms
15 days ago
Polyominoes
CaedenHarper
4,851
120ms
16 days ago
Polyominoes
KatieLG
1,338
1,246ms
17 days ago
Polyominoes
KatieLG
🥉
1,316
131ms
17 days ago
Polyominoes
KatieLG
1,267
41ms
17 days ago
Polyominoes
KatieLG
1,332
97ms
17 days ago
Polyominoes
KatieLG
1,331
643ms
17 days ago
Polyominoes
KatieLG
1,276
76ms
17 days ago
Polyominoes
KatieLG
1,346
289ms
17 days ago
Polyominoes
KatieLG
1,351
183ms
17 days ago
Polyominoes
KatieLG
1,420
74ms
17 days ago
Polyominoes
KatieLG
1,349
209ms
17 days ago
Polyominoes
KatieLG
1,638
712ms
17 days ago
Polyominoes
KatieLG
1,207
3ms
17 days ago
Polyominoes
KatieLG
1,400
8ms
17 days ago
Polyominoes
KatieLG
1,332
4,343ms
17 days ago
Polyominoes
KatieLG
1,355
9ms
17 days ago
Polyominoes
KatieLG
1,272
44ms
17 days ago
Polyominoes
KatieLG
1,366
398ms
17 days ago
Polyominoes
KatieLG
1,444
261ms
17 days ago
Polyominoes
KatieLG
1,393
102ms
17 days ago
Polyominoes
KatieLG
1,329
360ms
17 days ago
Polyominoes
KatieLG
1,272
796ms
17 days ago
Polyominoes
KatieLG
1,271
201ms
17 days ago
Polyominoes
KatieLG
1,463
2ms
17 days ago
Polyominoes
KatieLG
1,378
134ms
17 days ago
Polyominoes
KatieLG
157
1,869ms
17 days ago
Polyominoes
h3ra993huskp
1,211
519ms
18 days ago
Polyominoes
KatieLG
284
524ms
18 days ago
Polyominoes
rucin93
178
57ms
18 days ago
Polyominoes
albanian-laundromat
🥉
476
136ms
19 days ago
Polyominoes
albanian-laundromat
🥈
337
423ms
20 days ago
Polyominoes
HumanoidCPU
3,599
64ms
20 days ago
Polyominoes
JOrE20
💎
1,792
7ms
20 days ago
Polyominoes
JOrE20
6,421
3ms
20 days ago
Polyominoes
dokutan
943
3ms
21 days ago
Polyominoes
prestosilver
6,626
3ms
21 days ago
Polyominoes
blaztoma
269
13ms
22 days ago
Polyominoes
FortuiteMan
329
27ms
22 days ago
Polyominoes
albanian-laundromat
💎
234
253ms
23 days ago
Polyominoes
Yax42
650
447ms
23 days ago
Polyominoes
KatieLG
3,574
1ms
26 days ago
Polyominoes
KatieLG
4,837
2ms
26 days ago
Polyominoes
KatieLG
4,871
4ms
26 days ago
Polyominoes
snoozingnewt
🥈
292
184ms
26 days ago
Polyominoes
albanian-laundromat
💎
362
1,439ms
27 days ago
Polyominoes
snoozingnewt
🥈
347
121ms
20 Nov 2025
Polyominoes
sean-niemann
💎
178
252ms
19 Nov 2025
Polyominoes
KatieLG
1,305
70ms
18 Nov 2025
Polyominoes
dokutan
1,225
3ms
18 Nov 2025