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    The Gray Code Decoder and Gray Code Encoder holes will go live in approximately . Why not try and solve them ahead of time?

    duckyluuk (he/him) 🇳🇱

    110,666
    112,073
    💎42
    🥇153
    🥈48
    🥉55

    🪨⭐

    126 / 126 Holes

    🔣

    43 / 64 Langs

    🏆

    74 / 109 Cheevos

    📅

    2 Holes Authored

    3 Referrals

    12 Days of Christmas
    2nd 18th 1st 5th
    24 Game
    7th 15th 2nd
    99 Bottles of Beer
    6th 13th 6th
    Abundant Numbers
    19th 60th 1st
    Abundant Numbers (Long)
    16th 18th 1st
    Arabic to Roman
    11th 43rd 8th 24th 4th
    Arithmetic Numbers
    15th 11th 2nd
    Arrows
    12th 19th 3rd
    Ascending Primes
    11th 26th 💎
    ASCII Table
    2nd 12th 18th 💎
    Billiards
    6th 8th
    brainfuck
    9th 8th 18th 4th
    Calendar
    33rd
    Card Number Validation
    6th 1st 14th 3rd
    Catalan Numbers
    4th 1st 💎
    Catalan’s Constant
    13th 1st 34th
    Christmas Trees
    11th 11th 23rd 16th 5th
    Collatz
    15th 74th 8th 36th 6th
    Continued Fractions
    30th
    CSS Colors
    24th 1st 31st 3rd
    Cubes
    10th 21st
    Day of Week
    16th 1st 1st1st 3rd
    DFA Simulator
    4th 22nd 3rd 6th 💎
    Diamonds
    6th 10th 17th 💎
    Divisors
    25th 170th 1st 1st 5th
    Emirp Numbers
    18th 11th 15th 4th
    Emirp Numbers (Long)
    10th 24th
    Emojify
    11th 18th 2nd
    Evil Numbers
    8th 64th 15th 1st 3rd 15th
    Evil Numbers (Long)
    21st 44th 13th 41st 3rd
    Factorial Factorisation
    6th 17th 23rd 11th 5th
    Farey Sequence
    12th 19th 5th 20th 2nd
    Fibonacci
    13th9th18th9th43rd19th18th 24th49th48th 31st 22nd 30th 26th1st 7th1st 32nd13th56th1st 28th7th8th 36th46th
    Fizz Buzz
    2nd 14th 30th1st 10th 1st 21st 3rd4th
    Foo Fizz Buzz Bar
    18th 34th 20th 5th
    Forsyth–Edwards Notation
    13th 5th 14th 3rd
    Fractions
    14th 1st 1st 2nd1st
    Game of Life
    9th 19th 16th 5th 11th 2nd
    Gijswijt’s Sequence
    2nd 10th 5th 13th 2nd
    Happy Numbers
    19th 9th 38th 6th
    Happy Numbers (Long)
    10th 21st 4th
    Hexdump
    15th 39th 3rd
    Hilbert Curve
    14th
    Intersection
    14th 36th 19th
    Inventory Sequence
    13th 10th 24th 3rd
    ISBN
    12th 30th 12th 3rd
    Jacobi Symbol
    14th 30th
    Kaprekar Numbers
    20th 36th 68th 💎
    Kolakoski Constant
    10th 5th 24th 3rd
    Kolakoski Sequence
    9th 11th 40th 6th 13th 4th
    Leap Years
    31st 186th 119th 4th
    Levenshtein Distance
    9th 21st
    Leyland Numbers
    18th 1st 4th
    ln 2
    22nd 1st 5th
    Look and Say
    3rd 16th 15th 3rd12th 34th 2nd
    Lucky Numbers
    12th 18th 3rd
    Lucky Tickets
    10th 12th 22nd 2nd
    Mahjong
    13th 12th
    Mandelbrot
    10th 7th 💎
    Maze
    14th 25th
    Medal Tally
    4th 14th 5th 1st 3rd
    Minesweeper
    12th 6th 💎
    Morse Decoder
    6th 9th
    Morse Encoder
    7th 10th
    Multitap Input
    14th 13th 12th 2nd
    Musical Chords
    12th 20th
    N Queens
    6th 18th 9th 2nd
    Niven Numbers
    32nd 1st 47th 8th
    Niven Numbers (Long)
    20th 17th 44th 4th
    Number Spiral
    5th 5th 3rd
    Odious Numbers
    9th 54th 15th 1st 3rd
    Odious Numbers (Long)
    9th 39th 12th 1st 3rd
    Ordinal Numbers
    11th 4th 💎
    PalindromemordnilaP
    4th 21st 5th 13th 4th
    Pangram Grep
    7th 29th 13th41st19th 8th 42nd17th 37th 4th 15th19th
    Partition Numbers
    18th 17th 33rd 💎
    Pascal’s Triangle
    20th 41st 49th 47th 6th
    Pernicious Numbers
    20th 1st 4th
    Pernicious Numbers (Long)
    17th 1st 4th
    Poker
    6th 8th
    Polyominoes
    7th 11th 💎
    Prime Numbers
    35th 85th 89th 22nd 57th 1st
    Prime Numbers (Long)
    26th 69th 43rd 22nd 1st 5th
    Proximity Grid
    8th 12th 💎
    QR Decoder
    8th 15th
    Quine
    1st 1st 25th 35th1st 185th 30th1st 1st 1st
    Recamán
    13th 35th 22nd 4th
    Repeating Decimals
    18th 35th 2nd
    Reverse Polish Notation
    15th 53rd 32nd 2nd
    Reversi
    8th 12th
    Rijndael S-box
    11th 21st 3rd
    Rock-paper-scissors-Spock-lizard
    10th 16th 💎
    Roman to Arabic
    12th 27th 1st 1st
    ROT13
    2nd 21st 1st 4th
    Rule 110
    23rd 59th 3rd
    Scrambled Sort
    18th 5th 💎
    Set
    16th 8th 2nd
    Seven Segment
    15th 30th 2nd
    SI Units
    10th 21st
    Sierpiński Triangle
    4th 13th 18th 39th 💎
    Smith Numbers
    12th 20th 3rd
    Spelling Numbers
    8th82nd 21st 💎
    Star Wars GPT
    16th 47th 2nd
    Star Wars Opening Crawl
    13th 12th
    Sudoku
    11th 18th
    Sudoku (Fill-in)
    10th 14th
    Ten-pin Bowling
    15th 20th
    Tic-tac-toe
    17th 25th 11th 💎
    Time Distance
    12th 12th 2nd
    Tongue-twisters
    11th 20th 💎
    Topological Sort
    14th 11th 28th
    Tower of Hanoi
    34th 20th 3rd
    Transpose Sentence
    3rd 12th 5th 12th 4th
    Trinomial Triangle
    23rd 2nd
    United States
    12th 22nd 24th 💎
    Vampire Numbers
    5th 5th 💎
    Van Eck Sequence
    7th 24th 1st 2nd
    Zeckendorf Representation
    3rd 21st 1st 6th
    Zodiac Signs
    12th 20th 💎
    γ
    14th 1st5th 28th 4th
    λ
    12th 16th 6th 25th 4th 9th
    π
    16th 9th 7th14th 1st5th 12th 4th
    τ
    8th 6th13th 62nd4th 9th 4th
    φ
    17th 11th 45th 34th 5th
    √2
    21st 24th 15th 1st 5th
    𝑒
    20th 1st6th 1st40th 5th