The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 40 hours. Why not try and solve them ahead of time?
Zeckendorf Representation in Python in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial 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 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring 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 Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal 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 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 1st JayXon 🇺🇸 1,000 112 34ms 1 Jul 2024 1st duckyluuk 🇳🇱 1,000 112 33ms 3 Jul 2024 1st 4atj 1,000 112 33ms 30 Jun 2025 1st khvdm 1,000 112 32ms 35 hours ago 5th btnlq 991 113 869ms 2 Jul 2024 6th pardouin 🇫🇷 982 114 35ms 1 Jul 2024 6th kg583 🇺🇸 982 114 31ms 1 Jul 2024 6th Steffan153 🇫🇮 982 114 31ms 1 Jul 2024 6th m-tkach 🇺🇦 982 114 30ms 2 Jul 2024 6th kops-cg 982 114 34ms 24 Feb 2025 6th hallvabo 🇳🇴 982 114 31ms 28 Mar 2025 6th sean-niemann 🇺🇸 982 114 33ms 15 Oct 2025 13th ovs-code 🇩🇪 974 115 11ms 2 Jul 2024 13th bizy-coder 974 115 31ms 2 Jul 2024 13th HPWiz 🇳🇿 974 115 34ms 3 Jul 2024 13th emgordon154 974 115 33ms 20 Apr 2025 13th blaztoma 🇱🇹 974 115 12ms 19 days ago 18th GrayJoKing 🇦🇺 966 116 58ms 3 Jul 2024 18th xnor-gate 966 116 33ms 23 Feb 2025 18th MeWhenI 🇻🇦 966 116 44ms 6 May 2025 21st lynn 949 118 39ms 1 Jul 2024 21st AlephSquirrel 949 118 31ms 2 Jul 2024 21st ndren 949 118 13ms 2 Jul 2024 21st Seek64 🇩🇪 949 118 12ms 7 Jul 2024 21st davecame 949 118 13ms 10 Jul 2024 21st Shanethegamer 🇺🇸 949 118 11ms 13 Sep 2024 27th GolfingSuccess 🇬🇷 941 119 11ms 1 Jul 2024 27th orthoplex 🇨🇽 941 119 36ms 1 Jul 2024 27th 5cw 🇺🇸 941 119 12ms 1 Jul 2024 27th inventshah 941 119 12ms 1 Jul 2024 27th sisyphus-ppcg 🇦🇺 941 119 34ms 3 Jul 2024 27th cros107 🇦🇺 941 119 12ms 3 Jul 2024 27th DialFrost 🇸🇬 941 119 33ms 3 Jul 2024 27th SirBogman 🇺🇸 941 119 18ms 4 Jul 2024 27th thatbirdguythatuknownot 941 119 12ms 5 Jul 2024 27th firegene 🇮🇪 941 119 12ms 1 Aug 2024 27th bricknellj 941 119 12ms 23 May 2025 27th albanian-laundromat 941 119 12ms 6 Feb 2026 27th Flekay 🇩🇪 941 119 11ms 12 Feb 2026 27th snoozingnewt 🇨🇦 941 119 12ms 13 Feb 2026 27th edsrzf 🇳🇿 941 119 12ms 17 days ago 27th aksyristos 941 119 13ms 2 days ago 43rd error256 933 120 11ms 1 Jul 2024 43rd rschwa6308 🇺🇸 933 120 13ms 11 Jul 2024 43rd lifthrasiir 🇰🇷 933 120 55ms 2 Dec 2024 43rd ahmetdemirag 🇨🇾 933 120 33ms 13 Feb 2025 43rd CornerMercury 🇬🇧 933 120 32ms 17 Dec 2025 48th CaedenHarper 🇨🇦 918 122 12ms 2 Sep 2024 48th Bulmenisaurus 918 122 11ms 9 Oct 2024 48th solisolu 918 122 12ms 9 Nov 2025 48th KatieLG 🇬🇧 918 122 11ms 7 Jan 2026 48th ryyyn 🇺🇸 918 122 30ms 10 Feb 2026 53rd bnic24 911 123 11ms 29 Jul 2024 53rd iosovi 🇷🇴 911 123 11ms 9 Aug 2024 53rd plcc0 911 123 11ms 4 Apr 2025 53rd KasperKivimaeki 🇫🇮 911 123 11ms 5 Jul 2025 53rd fuzzylojik-golf 🇺🇸 911 123 11ms 6 Jul 2025 53rd rucin93 🇵🇱 911 123 11ms 6 Jul 2025 53rd Matter1024 🇮🇳 911 123 12ms 1 Mar 2026 60th mousetail 🇳🇱 903 124 11ms 2 Jul 2024 60th FlorianCassayre 🇫🇷 903 124 11ms 6 Jul 2024 60th codingisgreatbutiamnot 903 124 11ms 24 Aug 2024 60th mathisfun271 903 124 33ms 3 Oct 2024 60th Lv0Sys 🇵🇱 903 124 11ms 23 Feb 2026 65th anter69 🇭🇺 896 125 11ms 23 Jan 2026 66th starfihs 889 126 31ms 2 Jul 2024 66th zbreit 🇺🇸 889 126 11ms 9 Jul 2024 66th StardustGogeta 889 126 11ms 9 Jul 2024 66th andrewjc2000 889 126 13ms 25 Jul 2025 66th annaproxy 889 126 11ms 31 Aug 2025 71st stefangimmillaro 882 127 12ms 22 Aug 2024 72nd moustave 855 131 11ms 31 Mar 2025 72nd gigaprofisi 🇺🇸 855 131 13ms 20 Jun 2025 74th adamnielson42 🇺🇸 848 132 10ms 7 Oct 2024 75th Emutis 🇱🇹 842 133 10ms 1 Mar 2026 76th msbranicky 836 134 10ms 1 Jul 2024 77th FortuiteMan 🇫🇷 830 135 10ms 20 Dec 2025 78th guilhem-roy 🇫🇷 824 136 847ms 10 Jul 2024 78th aalec 824 136 9ms 22 Nov 2025 80th wobblybits 818 137 10ms 19 Aug 2025 1–80 of 154 Next Last