The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
💎 Oldest diamonds (uncontested gold medals) in PowerShell in chars. Achievements Cheevos Holes Languages Medals Miscellaneous Overall 💎 Diamond Deltas Most Tied 🥇 Golds Oldest 💎 Diamonds Oldest 🦄 Unicorns All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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) 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 All Languages ><> 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 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 All Bytes Chars Overall 💎 Diamond Deltas Most Tied 🥇 Golds Oldest 💎 Diamonds Oldest 🦄 Unicorns Scoring All Bytes Chars Language All ><> 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 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 Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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) 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 # Golfer Hole Submitted 1st primo-ppcg 🇹🇭 Rule 110 12 Dec 2020 2nd btnlq Lucky Tickets 25 Oct 2021 3rd nwellnhof 🇩🇪 Diamonds 2 Dec 2021 4th primo-ppcg 🇹🇭 Catalan’s Constant 22 Jan 2022 5th juliansiebert 🇩🇪 Divisors 30 Jul 2022 6th nwellnhof 🇩🇪 Gijswijt’s Sequence 1 Jul 2023 7th primo-ppcg 🇹🇭 τ 1 Aug 2023 8th bitsandbeyond 🇳🇱 Sierpiński Triangle 27 Dec 2023 9th Lydxn 🇨🇦 Odious Numbers 5 Jan 2024 10th Lydxn 🇨🇦 Evil Numbers 5 Jan 2024 11th dcgjb Foo Fizz Buzz Bar 23 Jan 2024 12th bitsandbeyond 🇳🇱 Leyland Numbers 12 Feb 2024 13th dcgjb Reverse Polish Notation 23 Feb 2024 14th SirBogman 🇺🇸 γ 18 May 2024 15th bitsandbeyond 🇳🇱 Roman to Arabic 7 Jun 2024 16th bitsandbeyond 🇳🇱 Emirp Numbers (Long) 16 Aug 2024 17th nwellnhof 🇩🇪 PalindromemordnilaP 1 Sep 2024 18th bitsandbeyond 🇳🇱 24 Game 7 Sep 2024 19th nwellnhof 🇩🇪 Game of Life 10 Oct 2024 20th nwellnhof 🇩🇪 Kolakoski Sequence 27 Oct 2024 21st nwellnhof 🇩🇪 Pascal’s Triangle 27 Oct 2024 22nd nwellnhof 🇩🇪 Van Eck Sequence 29 Oct 2024 23rd nwellnhof 🇩🇪 Inventory Sequence 29 Oct 2024 24th bitsandbeyond 🇳🇱 ISBN 18 Jan 2025 25th bitsandbeyond 🇳🇱 Arithmetic Numbers 19 Jan 2025 26th bitsandbeyond 🇳🇱 Vampire Numbers 19 Jan 2025 27th bitsandbeyond 🇳🇱 Happy Numbers (Long) 1 Feb 2025 28th bitsandbeyond 🇳🇱 Seven Segment 21 Feb 2025 29th bitsandbeyond 🇳🇱 Rock-paper-scissors-Spock-lizard 14 Mar 2025 30th bitsandbeyond 🇳🇱 N Queens 28 Mar 2025 31st bitsandbeyond 🇳🇱 12 Days of Christmas 5 May 2025 32nd bitsandbeyond 🇳🇱 Ascending Primes 6 May 2025 33rd bitsandbeyond 🇳🇱 Lucky Numbers 7 Jun 2025 34th nwellnhof 🇩🇪 Scrambled Sort 8 Jun 2025 35th bitsandbeyond 🇳🇱 Number Spiral 16 Jun 2025 36th bitsandbeyond 🇳🇱 Musical Chords 22 Jun 2025 37th bitsandbeyond 🇳🇱 λ 25 Jun 2025 38th bitsandbeyond 🇳🇱 99 Bottles of Beer 25 Jul 2025 39th nwellnhof 🇩🇪 ROT13 6 Aug 2025 40th bitsandbeyond 🇳🇱 Cubes 6 Aug 2025 41st bitsandbeyond 🇳🇱 Mandelbrot 24 Aug 2025 42nd SirBogman 🇺🇸 Hilbert Curve 16 Sep 2025 43rd bitsandbeyond 🇳🇱 Kaprekar Numbers 4 Oct 2025 44th bitsandbeyond 🇳🇱 Emojify 4 Oct 2025 45th bitsandbeyond 🇳🇱 Kolakoski Constant 7 Oct 2025 46th bitsandbeyond 🇳🇱 ASCII Table 7 Oct 2025 47th bitsandbeyond 🇳🇱 QR Decoder 9 Oct 2025 48th bitsandbeyond 🇳🇱 Zodiac Signs 11 Oct 2025 49th bitsandbeyond 🇳🇱 Factorial Factorisation 11 Oct 2025 50th bitsandbeyond 🇳🇱 Rijndael S-box 11 Oct 2025 51st JayXon 🇺🇸 Tongue-twisters 12 Oct 2025 52nd nwellnhof 🇩🇪 Trinomial Triangle 14 Oct 2025 53rd bitsandbeyond 🇳🇱 Polyominoes 15 Oct 2025 54th bitsandbeyond 🇳🇱 Medal Tally 16 Oct 2025 55th bitsandbeyond 🇳🇱 Minesweeper 9 Nov 2025 56th bitsandbeyond 🇳🇱 Multitap Input 27 Jan 2026 57th bitsandbeyond 🇳🇱 Sudoku (Fill-in) 31 Jan 2026 58th bitsandbeyond 🇳🇱 Poker 19 Feb 2026 59th bitsandbeyond 🇳🇱 Star Wars Opening Crawl 19 Feb 2026 60th bitsandbeyond 🇳🇱 Morse Encoder 22 Feb 2026 61st bitsandbeyond 🇳🇱 Forsyth–Edwards Notation 22 Feb 2026 62nd bitsandbeyond 🇳🇱 SI Units 23 Feb 2026 63rd bitsandbeyond 🇳🇱 Arabic to Roman 23 Feb 2026 64th bitsandbeyond 🇳🇱 Billiards 23 Feb 2026 65th bitsandbeyond 🇳🇱 Zeckendorf Representation 23 Feb 2026 66th bitsandbeyond 🇳🇱 Jacobi Symbol 23 Feb 2026 67th bitsandbeyond 🇳🇱 Mahjong 23 Feb 2026 68th bitsandbeyond 🇳🇱 Ten-pin Bowling 23 Feb 2026 69th bitsandbeyond 🇳🇱 Topological Sort 23 Feb 2026 70th bitsandbeyond 🇳🇱 Set 23 Feb 2026 71st bitsandbeyond 🇳🇱 Time Distance 23 Feb 2026 72nd bitsandbeyond 🇳🇱 DFA Simulator 23 Feb 2026 73rd bitsandbeyond 🇳🇱 Sudoku 23 Feb 2026 74th bitsandbeyond 🇳🇱 Star Wars GPT 23 Feb 2026 75th bitsandbeyond 🇳🇱 Spelling Numbers 23 Feb 2026 76th bitsandbeyond 🇳🇱 Levenshtein Distance 23 Feb 2026 77th bitsandbeyond 🇳🇱 Hexdump 23 Feb 2026 78th bitsandbeyond 🇳🇱 Intersection 23 Feb 2026 79th bitsandbeyond 🇳🇱 brainfuck 23 Feb 2026 80th bitsandbeyond 🇳🇱 Maze 23 Feb 2026 1–80 of 88 Next Last