The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Zeckendorf Representation in all languages 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 GolfingSuccess 🇬🇷 1,000 35 62ms 1 Jul 2024 1st saito-ta 🇯🇵 1,000 35 63ms 1 Jul 2024 1st ovs-code 🇩🇪 1,000 35 59ms 3 Jul 2024 1st primo-ppcg 🇹🇭 1,000 35 57ms 26 Jan 2025 5th ovs-code 🇩🇪 987 38 3ms 27 Sep 2024 5th zacjl 987 38 2ms 28 Sep 2024 5th 2bular 987 38 3ms 29 Sep 2024 8th JayXon 🇺🇸 955 112 34ms 1 Jul 2024 8th duckyluuk 🇳🇱 955 112 33ms 3 Jul 2024 8th 4atj 955 112 33ms 30 Jun 2025 8th khvdm 955 112 32ms 13 hours ago 12th JayXon 🇺🇸 949 73 10ms 2 Jul 2024 13th btnlq 947 113 869ms 2 Jul 2024 14th canissimia 🇦🇶 943 54 2ms 30 Jan 2026 15th pardouin 🇫🇷 939 114 35ms 1 Jul 2024 15th kg583 🇺🇸 939 114 31ms 1 Jul 2024 15th Steffan153 🇫🇮 939 114 31ms 1 Jul 2024 15th m-tkach 🇺🇦 939 114 30ms 2 Jul 2024 15th kops-cg 939 114 34ms 24 Feb 2025 15th hallvabo 🇳🇴 939 114 31ms 28 Mar 2025 15th sean-niemann 🇺🇸 939 114 33ms 15 Oct 2025 22nd GrayJoKing 🇦🇺 937 70 36ms 2 Jul 2024 22nd ovs-code 🇩🇪 937 70 41ms 3 Jul 2024 24th ovs-code 🇩🇪 936 74 11ms 1 Jul 2024 24th emplv 🇱🇻 936 74 10ms 1 Jul 2024 24th sean-niemann 🇺🇸 936 74 11ms 1 Jul 2024 24th rucin93 🇵🇱 936 74 15ms 1 Jul 2024 24th Steffan153 🇫🇮 936 74 10ms 1 Jul 2024 24th nwellnhof 🇩🇪 936 74 17ms 1 Jul 2024 24th vlpx 🇫🇮 936 74 10ms 1 Aug 2024 31st ovs-code 🇩🇪 930 115 11ms 2 Jul 2024 31st bizy-coder 930 115 31ms 2 Jul 2024 31st HPWiz 🇳🇿 930 115 34ms 3 Jul 2024 31st emgordon154 930 115 33ms 20 Apr 2025 31st blaztoma 🇱🇹 930 115 12ms 18 days ago 36th rhdqor213 927 93 2ms 2 Jul 2024 36th saito-ta 🇯🇵 927 93 2ms 3 Jul 2024 36th KasperKivimaeki 🇫🇮 927 93 2ms 18 Nov 2025 39th JayXon 🇺🇸 927 96 473ms 1 Jul 2024 40th GrayJoKing 🇦🇺 926 60 141ms 5 Jul 2024 40th nwellnhof 🇩🇪 926 60 226ms 5 Jul 2024 42nd sisyphus-ppcg 🇦🇺 924 71 58ms 1 Dec 2025 43rd dmrichwa 🇺🇸 924 75 15ms 1 Jul 2024 43rd sisyphus-ppcg 🇦🇺 924 75 11ms 4 Jul 2024 45th GrayJoKing 🇦🇺 922 116 58ms 3 Jul 2024 45th xnor-gate 922 116 33ms 23 Feb 2025 45th MeWhenI 🇻🇦 922 116 44ms 6 May 2025 48th ovs-code 🇩🇪 919 61 33ms 4 Jul 2024 49th sisyphus-ppcg 🇦🇺 918 69 3ms 1 Dec 2025 50th bitsandbeyond 🇳🇱 918 74 294ms 6 Feb 2025 51st antimon2 🇯🇵 916 77 268ms 1 Jul 2024 52nd bstrat 915 41 2ms 8 Oct 2025 53rd GrayJoKing 🇦🇺 914 59 8ms 2 Jul 2024 54th MeWhenI 🇻🇦 912 76 10ms 1 Jul 2024 54th inventshah 912 76 11ms 1 Jul 2024 54th tayloia 🇬🇧 912 76 11ms 2 Jul 2024 54th emgordon154 912 76 10ms 18 Jul 2024 54th stefangimmillaro 912 76 11ms 27 Aug 2024 54th Lv0Sys 🇵🇱 912 76 12ms 23 Feb 2026 54th albanian-laundromat 912 76 11ms 25 days ago 61st saito-ta 🇯🇵 910 74 105ms 2 Jul 2024 62nd Shanethegamer 🇺🇸 908 98 484ms 30 Mar 2025 63rd lynn 907 118 39ms 1 Jul 2024 63rd AlephSquirrel 907 118 31ms 2 Jul 2024 63rd ndren 907 118 13ms 2 Jul 2024 63rd Seek64 🇩🇪 907 118 12ms 7 Jul 2024 63rd davecame 907 118 13ms 10 Jul 2024 63rd Shanethegamer 🇺🇸 907 118 11ms 13 Sep 2024 69th emplv 🇱🇻 905 78 5ms 1 Jul 2024 70th Shanethegamer 🇺🇸 905 88 1,283ms 14 Sep 2024 70th JayXon 🇺🇸 905 88 1,178ms 14 Sep 2024 72nd JayXon 🇺🇸 905 121 431ms 7 Jul 2024 73rd 2bular 904 62 34ms 11 days ago 74th nwellnhof 🇩🇪 903 113 411ms 2 Jul 2024 74th AdrienHache 🇫🇷 903 113 396ms 17 Jan 2025 76th AdrienHache 🇫🇷 900 70 53ms 7 Nov 2024 77th error256 900 77 12ms 1 Jul 2024 77th DialFrost 🇸🇬 900 77 12ms 26 Dec 2024 79th MeWhenI 🇻🇦 899 67 31ms 1 Jul 2024 80th DialFrost 🇸🇬 899 81 765ms 9 Nov 2025 1–80 of 734 Next Last