The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 hours. Why not try and solve them ahead of time?
Day of Week 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 721st Intevel 🇩🇪 853 125 295ms 4 Jul 2023 721st xnacly 🇩🇪 853 125 288ms 4 Jul 2023 721st msbranicky 853 125 302ms 31 Aug 2023 724th MeWhenI 🇻🇦 852 52 1,471ms 17 Apr 2023 725th Yewzir 🇧🇪 852 81 212ms 3 Aug 2024 726th Poehavshi 851 96 14ms 26 Jun 2023 726th kurkale6ka 851 96 14ms 19 Nov 2023 726th chartung17 851 96 15ms 17 Dec 2023 726th jbjd 851 96 15ms 19 Feb 2024 726th msrawsonwork 851 96 15ms 1 Mar 2024 726th Grrisly 851 96 16ms 25 Mar 2024 726th yuchuehw 851 96 13ms 13 May 2024 726th tomh1012 851 96 13ms 20 Feb 2026 734th Shanethegamer 🇺🇸 851 132 7ms 20 Aug 2023 735th rucin93 🇵🇱 850 159 7ms 21 Apr 2025 735th edsrzf 🇳🇿 850 159 4ms 13 Feb 2026 737th DialFrost 🇸🇬 848 57 22ms 28 Feb 2025 738th MeWhenI 🇻🇦 846 102 9ms 6 Mar 2024 739th MeWhenI 🇻🇦 844 46 4ms 12 Aug 2024 740th stefangimmillaro 844 64 2,593ms 31 Oct 2024 740th emgordon154 844 64 2,572ms 30 Jan 2025 742nd grospolina 843 80 61ms 2 Oct 2024 743rd juliusgeo 843 97 24ms 19 Apr 2023 743rd Just4FunCoder 843 97 14ms 27 Oct 2023 743rd Aquateraneal 🇺🇸 843 97 19ms 24 days ago 746th Murphy4444 842 19 268ms 3 Dec 2025 747th ovs-code 🇩🇪 842 82 34ms 18 Oct 2025 748th Steffan153 🇫🇮 840 48 2ms 17 Apr 2023 748th clockworknazo 840 48 2ms 18 Apr 2023 748th primo-ppcg 🇹🇭 840 48 2ms 21 Apr 2023 748th sean-niemann 🇺🇸 840 48 2ms 21 Apr 2023 748th sisyphus-ppcg 🇦🇺 840 48 2ms 24 Apr 2023 748th Lydxn 🇨🇦 840 48 2ms 2 May 2023 748th MeWhenI 🇻🇦 840 48 2ms 26 May 2023 748th ovs-code 🇩🇪 840 48 3ms 15 Aug 2023 748th retrohun 840 48 2ms 29 Jun 2024 748th DialFrost 🇸🇬 840 48 2ms 22 Dec 2024 748th Salutations45 840 48 2ms 7 Oct 2025 748th edsrzf 🇳🇿 840 48 3ms 5 Jan 2026 760th sean-niemann 🇺🇸 840 161 5ms 21 Apr 2025 760th GolfingSuccess 🇬🇷 840 161 5ms 20 Nov 2025 762nd MeWhenI 🇻🇦 839 53 9ms 28 Sep 2024 763rd antimon2 🇯🇵 839 144 279ms 29 Oct 2024 764th Yewzir 🇧🇪 837 71 382ms 19 Nov 2023 765th neel11235813 837 89 405ms 28 Mar 2024 766th CLOStrophobic 🇮🇹 836 89 8ms 6 May 2025 767th LogicalJoe 836 102 2ms 1 May 2023 768th Shanethegamer 🇺🇸 835 42 76ms 25 Mar 2024 768th MeWhenI 🇻🇦 835 42 75ms 2 Aug 2024 768th JOrE20 835 42 74ms 26 Feb 2026 771st Lydxn 🇨🇦 835 115 12ms 17 Apr 2023 772nd ssbhatt4321 834 98 14ms 11 Jun 2023 772nd tayacrystals 834 98 14ms 18 Nov 2023 772nd hiichbindermax 834 98 14ms 27 Jul 2024 772nd jatloe 834 98 14ms 23 Oct 2024 772nd denisfouchard 834 98 13ms 23 Aug 2025 772nd vhoulbreque 🇫🇷 834 98 22ms 4 Dec 2025 778th Steffan153 🇫🇮 834 162 4ms 29 Jan 2024 779th edsrzf 🇳🇿 834 165 122ms 28 Nov 2025 779th DialFrost 🇸🇬 834 165 103ms 2 Dec 2025 779th emgordon154 834 165 118ms 4 Dec 2025 779th snoozingnewt 🇨🇦 834 165 107ms 5 Dec 2025 783rd dvargas46 🇺🇸 833 98 103ms 18 Apr 2023 784th 0xjac 🇨🇭 833 128 294ms 11 Jun 2025 785th ovs-code 🇩🇪 833 145 265ms 24 Feb 2026 786th PowershellKnut 🇳🇴 832 81 55ms 7 Jan 2024 787th edsrzf 🇳🇿 832 191 32ms 13 Feb 2026 788th jipsong 🇩🇪 831 65 2,635ms 9 Jun 2025 789th emplv 🇱🇻 831 83 208ms 28 Mar 2025 790th Yewzir 🇧🇪 830 70 10ms 14 Dec 2023 790th emgordon154 830 70 11ms 6 Dec 2024 792nd JarrodCope 829 71 381ms 19 Apr 2024 793rd GolfingSuccess 🇬🇷 829 124 440ms 30 Dec 2024 794th Yewzir 🇧🇪 828 116 145ms 30 Apr 2023 795th albanian-laundromat 827 90 429ms 4 Aug 2025 796th jipsong 🇩🇪 827 101 3ms 9 Feb 2025 796th snoozingnewt 🇨🇦 827 101 4ms 12 Dec 2025 798th TaserTheFox 🇺🇸 826 99 19ms 17 Apr 2023 798th ehulinsky 🇺🇸 826 99 21ms 10 May 2023 798th minhtrancccp 826 99 19ms 1 Nov 2023 First Prev 721–800 of 1,514 Next Last