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 80th Steffan153 🇫🇮 899 81 752ms 16 Feb 2026 80th edsrzf 🇳🇿 899 81 790ms 16 days ago 83rd duckyluuk 🇳🇱 899 99 394ms 3 Jul 2024 84th GolfingSuccess 🇬🇷 899 119 11ms 1 Jul 2024 84th orthoplex 🇨🇽 899 119 36ms 1 Jul 2024 84th 5cw 🇺🇸 899 119 12ms 1 Jul 2024 84th inventshah 899 119 12ms 1 Jul 2024 84th sisyphus-ppcg 🇦🇺 899 119 34ms 3 Jul 2024 84th cros107 🇦🇺 899 119 12ms 3 Jul 2024 84th DialFrost 🇸🇬 899 119 33ms 3 Jul 2024 84th SirBogman 🇺🇸 899 119 18ms 4 Jul 2024 84th thatbirdguythatuknownot 899 119 12ms 5 Jul 2024 84th firegene 🇮🇪 899 119 12ms 1 Aug 2024 84th bricknellj 899 119 12ms 23 May 2025 84th albanian-laundromat 899 119 12ms 6 Feb 2026 84th Flekay 🇩🇪 899 119 11ms 12 Feb 2026 84th snoozingnewt 🇨🇦 899 119 12ms 13 Feb 2026 84th edsrzf 🇳🇿 899 119 12ms 16 days ago 84th aksyristos 899 119 13ms 2 days ago 100th JayXon 🇺🇸 898 86 154ms 30 Oct 2024 101st MeWhenI 🇻🇦 897 39 46ms 2 Jul 2024 102nd sean-niemann 🇺🇸 897 122 441ms 6 Jul 2024 102nd snyderek 🇺🇸 897 122 442ms 17 Dec 2024 104th DialFrost 🇸🇬 897 125 500ms 24 Sep 2025 104th sean-niemann 🇺🇸 897 125 477ms 24 Sep 2025 104th nwellnhof 🇩🇪 897 125 607ms 25 Sep 2025 104th JayXon 🇺🇸 897 125 442ms 26 Sep 2025 104th stefangimmillaro 897 125 516ms 6 Oct 2025 104th MeWhenI 🇻🇦 897 125 562ms 7 Nov 2025 104th Steffan153 🇫🇮 897 125 393ms 11 Feb 2026 104th edsrzf 🇳🇿 897 125 399ms 16 days ago 112th Steffan153 🇫🇮 896 62 202ms 1 Jul 2024 113th xsot 🇸🇬 894 79 5ms 26 Apr 2025 114th lifthrasiir 🇰🇷 893 42 2ms 29 Nov 2024 115th ovs-code 🇩🇪 892 79 346ms 8 Jul 2024 116th JayXon 🇺🇸 892 95 2ms 7 Jul 2024 117th error256 892 120 11ms 1 Jul 2024 117th rschwa6308 🇺🇸 892 120 13ms 11 Jul 2024 117th lifthrasiir 🇰🇷 892 120 55ms 2 Dec 2024 117th ahmetdemirag 🇨🇾 892 120 33ms 13 Feb 2025 117th CornerMercury 🇬🇧 892 120 32ms 17 Dec 2025 122nd JayXon 🇺🇸 890 97 112ms 7 Jul 2024 122nd Shanethegamer 🇺🇸 890 97 111ms 16 Sep 2024 124th ovs-code 🇩🇪 890 100 444ms 2 Jul 2024 124th pardouin 🇫🇷 890 100 565ms 3 Jul 2024 126th Steffan153 🇫🇮 890 123 467ms 11 Feb 2026 127th JayXon 🇺🇸 889 111 2ms 6 Jul 2024 128th sean-niemann 🇺🇸 888 82 1,184ms 23 Oct 2025 129th GrayJoKing 🇦🇺 888 95 89ms 17 Aug 2024 129th mousetail 🇳🇱 888 95 19ms 28 Sep 2024 129th ovs-code 🇩🇪 888 95 9ms 10 Oct 2024 129th DialFrost 🇸🇬 888 95 23ms 14 Feb 2026 133rd JayXon 🇺🇸 888 153 310ms 4 Jul 2024 133rd emplv 🇱🇻 888 153 288ms 4 Jul 2024 135th JayXon 🇺🇸 887 115 451ms 5 Jul 2024 135th tomtheisen 🇺🇸 887 115 420ms 7 Nov 2024 137th JayXon 🇺🇸 886 74 36ms 6 Jul 2024 137th Steffan153 🇫🇮 886 74 36ms 20 days ago 139th kumavale 886 150 181ms 28 Nov 2025 140th JayXon 🇺🇸 884 116 2,638ms 25 Jan 2025 141st snoozingnewt 🇨🇦 883 97 83ms 22 Nov 2025 141st DialFrost 🇸🇬 883 97 82ms 22 Nov 2025 143rd tailorspy 883 124 427ms 10 Jul 2024 143rd KasperKivimaeki 🇫🇮 883 124 468ms 28 Nov 2025 145th kg583 🇺🇸 882 121 12ms 18 days ago 146th lynn 882 129 135ms 2 Jul 2024 147th nwellnhof 🇩🇪 882 154 295ms 10 Jul 2024 148th MeWhenI 🇻🇦 881 99 22ms 16 Dec 2024 148th GrayJoKing 🇦🇺 881 99 21ms 3 Feb 2025 150th kg583 🇺🇸 881 115 19ms 18 May 2025 151st saito-ta 🇯🇵 880 72 3ms 2 Jul 2024 152nd namelessiw 880 116 431ms 20 Jun 2025 153rd JayXon 🇺🇸 880 151 154ms 29 Nov 2025 154th JayXon 🇺🇸 878 131 379ms 6 Jul 2024 154th Shanethegamer 🇺🇸 878 131 404ms 13 Sep 2024 156th JayXon 🇺🇸 878 132 110ms 5 Jul 2024 156th Shanethegamer 🇺🇸 878 132 105ms 13 Sep 2024 158th edsrzf 🇳🇿 877 79 15ms 16 days ago 159th JayXon 🇺🇸 877 106 162ms 24 May 2025 160th CaedenHarper 🇨🇦 877 122 12ms 2 Sep 2024 First Prev 81–160 of 735 Next Last