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?
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 720th xnacly 🇩🇪 853 125 288ms 4 Jul 2023 720th msbranicky 853 125 302ms 31 Aug 2023 723rd MeWhenI 🇻🇦 852 52 1,471ms 17 Apr 2023 724th Yewzir 🇧🇪 852 81 212ms 3 Aug 2024 725th Poehavshi 851 96 14ms 26 Jun 2023 725th kurkale6ka 851 96 14ms 19 Nov 2023 725th chartung17 851 96 15ms 17 Dec 2023 725th jbjd 851 96 15ms 19 Feb 2024 725th msrawsonwork 851 96 15ms 1 Mar 2024 725th Grrisly 851 96 16ms 25 Mar 2024 725th yuchuehw 851 96 13ms 13 May 2024 725th tomh1012 851 96 13ms 20 Feb 2026 733rd Shanethegamer 🇺🇸 851 132 7ms 20 Aug 2023 734th rucin93 🇵🇱 850 159 5ms 21 Apr 2025 734th edsrzf 🇳🇿 850 159 5ms 13 Feb 2026 736th DialFrost 🇸🇬 848 57 22ms 28 Feb 2025 737th MeWhenI 🇻🇦 846 102 9ms 6 Mar 2024 738th MeWhenI 🇻🇦 844 46 4ms 12 Aug 2024 739th stefangimmillaro 844 64 2,659ms 31 Oct 2024 739th emgordon154 844 64 2,572ms 30 Jan 2025 741st grospolina 843 80 61ms 2 Oct 2024 742nd juliusgeo 843 97 24ms 19 Apr 2023 742nd Just4FunCoder 843 97 14ms 27 Oct 2023 742nd Aquateraneal 🇺🇸 843 97 19ms 22 days ago 745th Murphy4444 842 19 268ms 3 Dec 2025 746th ovs-code 🇩🇪 842 82 34ms 18 Oct 2025 747th Steffan153 🇫🇮 840 48 2ms 17 Apr 2023 747th clockworknazo 840 48 2ms 18 Apr 2023 747th primo-ppcg 🇹🇭 840 48 2ms 21 Apr 2023 747th sean-niemann 🇺🇸 840 48 2ms 21 Apr 2023 747th sisyphus-ppcg 🇦🇺 840 48 2ms 24 Apr 2023 747th Lydxn 🇨🇦 840 48 2ms 2 May 2023 747th MeWhenI 🇻🇦 840 48 2ms 26 May 2023 747th ovs-code 🇩🇪 840 48 3ms 15 Aug 2023 747th retrohun 840 48 2ms 29 Jun 2024 747th DialFrost 🇸🇬 840 48 2ms 22 Dec 2024 747th Salutations45 840 48 2ms 7 Oct 2025 747th edsrzf 🇳🇿 840 48 3ms 5 Jan 2026 759th sean-niemann 🇺🇸 840 161 4ms 21 Apr 2025 759th GolfingSuccess 🇬🇷 840 161 4ms 20 Nov 2025 761st MeWhenI 🇻🇦 839 53 9ms 28 Sep 2024 762nd antimon2 🇯🇵 839 144 285ms 29 Oct 2024 763rd Yewzir 🇧🇪 837 71 382ms 19 Nov 2023 764th neel11235813 837 89 405ms 28 Mar 2024 765th CLOStrophobic 🇮🇹 836 89 8ms 6 May 2025 766th LogicalJoe 836 102 2ms 1 May 2023 767th Shanethegamer 🇺🇸 835 42 76ms 25 Mar 2024 767th MeWhenI 🇻🇦 835 42 75ms 2 Aug 2024 767th JOrE20 835 42 74ms 26 Feb 2026 770th Lydxn 🇨🇦 835 115 12ms 17 Apr 2023 771st ssbhatt4321 834 98 14ms 11 Jun 2023 771st tayacrystals 834 98 14ms 18 Nov 2023 771st hiichbindermax 834 98 14ms 27 Jul 2024 771st jatloe 834 98 14ms 23 Oct 2024 771st denisfouchard 834 98 13ms 23 Aug 2025 771st vhoulbreque 🇫🇷 834 98 22ms 4 Dec 2025 777th Steffan153 🇫🇮 834 162 4ms 29 Jan 2024 778th edsrzf 🇳🇿 834 165 122ms 28 Nov 2025 778th DialFrost 🇸🇬 834 165 103ms 2 Dec 2025 778th emgordon154 834 165 118ms 4 Dec 2025 778th snoozingnewt 🇨🇦 834 165 107ms 5 Dec 2025 782nd dvargas46 🇺🇸 833 98 103ms 18 Apr 2023 783rd 0xjac 🇨🇭 833 128 294ms 11 Jun 2025 784th ovs-code 🇩🇪 833 145 265ms 24 Feb 2026 785th PowershellKnut 🇳🇴 832 81 66ms 7 Jan 2024 786th edsrzf 🇳🇿 832 191 32ms 13 Feb 2026 787th jipsong 🇩🇪 831 65 2,635ms 9 Jun 2025 788th emplv 🇱🇻 831 83 220ms 28 Mar 2025 789th Yewzir 🇧🇪 830 70 10ms 14 Dec 2023 789th emgordon154 830 70 11ms 6 Dec 2024 791st JarrodCope 829 71 381ms 19 Apr 2024 792nd GolfingSuccess 🇬🇷 829 124 440ms 30 Dec 2024 793rd Yewzir 🇧🇪 828 116 145ms 30 Apr 2023 794th albanian-laundromat 827 90 429ms 4 Aug 2025 795th jipsong 🇩🇪 827 101 3ms 9 Feb 2025 795th snoozingnewt 🇨🇦 827 101 4ms 12 Dec 2025 797th TaserTheFox 🇺🇸 826 99 19ms 17 Apr 2023 797th ehulinsky 🇺🇸 826 99 21ms 10 May 2023 797th minhtrancccp 826 99 19ms 1 Nov 2023 797th roguh 🇬🇹 826 99 18ms 22 Jan 2024 First Prev 721–800 of 1,513 Next Last