The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Calendar 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 2bular 1,000 42 32ms 19 Oct 2025 2nd khvdm 959 99 15ms 28 Dec 2024 2nd hallvabo 🇳🇴 959 99 16ms 28 Dec 2024 2nd GolfingSuccess 🇬🇷 959 99 17ms 29 Dec 2024 2nd btnlq 959 99 16ms 29 Dec 2024 2nd m-tkach 🇺🇦 959 99 16ms 27 Apr 2025 2nd 5cw 🇺🇸 959 99 16ms 4 May 2025 2nd 4atj 959 99 17ms 23 Jun 2025 2nd commandz0 🇺🇸 959 99 16ms 27 Aug 2025 2nd ryyyn 🇺🇸 959 99 16ms 19 Oct 2025 2nd sunleonid 959 99 16ms 28 Nov 2025 2nd duckyluuk 🇳🇱 959 99 16ms 12 Dec 2025 2nd Seek64 🇩🇪 959 99 17ms 15 Dec 2025 2nd CornerMercury 🇬🇧 959 99 16ms 18 Dec 2025 2nd ovs-code 🇩🇪 959 99 16ms 18 Dec 2025 2nd ndren 959 99 16ms 18 Dec 2025 2nd sean-niemann 🇺🇸 959 99 17ms 18 Dec 2025 2nd bizy-coder 959 99 16ms 19 Dec 2025 2nd kg583 🇺🇸 959 99 16ms 19 Dec 2025 2nd blaztoma 🇱🇹 959 99 16ms 19 Dec 2025 2nd pardouin 🇫🇷 959 99 15ms 20 Dec 2025 2nd Emutis 🇱🇹 959 99 16ms 20 Dec 2025 2nd lukegustafson 🇺🇸 959 99 17ms 21 Dec 2025 2nd rucin93 🇵🇱 959 99 16ms 21 Dec 2025 2nd emgordon154 959 99 16ms 23 Dec 2025 2nd CaedenHarper 🇨🇦 959 99 16ms 23 Dec 2025 2nd edsrzf 🇳🇿 959 99 16ms 30 Dec 2025 2nd JayXon 🇺🇸 959 99 16ms 1 Jan 2026 2nd error256 959 99 16ms 1 Jan 2026 2nd nwellnhof 🇩🇪 959 99 16ms 1 Jan 2026 2nd FortuiteMan 🇫🇷 959 99 16ms 1 Jan 2026 2nd fuzzylojik-golf 🇺🇸 959 99 16ms 3 Jan 2026 2nd stefangimmillaro 959 99 16ms 7 Jan 2026 2nd bzijlema 🇳🇱 959 99 16ms 7 Jan 2026 2nd DialFrost 🇸🇬 959 99 16ms 7 Jan 2026 2nd Openstreetmapler 959 99 16ms 12 Jan 2026 2nd D-MOVE 🇵🇭 959 99 16ms 20 Jan 2026 2nd b-illy 🇬🇧 959 99 15ms 31 Jan 2026 2nd esmaycat 959 99 15ms 1 Feb 2026 2nd Steffan153 🇫🇮 959 99 16ms 11 Feb 2026 2nd Flekay 🇩🇪 959 99 16ms 18 Feb 2026 2nd snoozingnewt 🇨🇦 959 99 16ms 20 Feb 2026 2nd Lv0Sys 🇵🇱 959 99 17ms 21 Feb 2026 2nd dokutan 959 99 16ms 25 days ago 2nd Languag3 959 99 15ms 24 days ago 2nd Aquateraneal 🇺🇸 959 99 16ms 17 days ago 2nd MeWhenI 🇻🇦 959 99 17ms 10 days ago 48th ovs-code 🇩🇪 955 44 33ms 19 Oct 2025 48th GolfingSuccess 🇬🇷 955 44 31ms 2 Dec 2025 50th AlephSquirrel 940 101 15ms 28 Dec 2024 50th anter69 🇭🇺 940 101 16ms 26 Nov 2025 50th enigma 940 101 16ms 19 Dec 2025 50th qpwoeirut 940 101 16ms 21 Dec 2025 50th Mukundan314 940 101 16ms 21 Dec 2025 50th KatieLG 🇬🇧 940 101 17ms 21 Dec 2025 50th HPWiz 🇳🇿 940 101 16ms 21 Dec 2025 50th KasperKivimaeki 🇫🇮 940 101 15ms 22 Dec 2025 50th ahmetdemirag 🇨🇾 940 101 15ms 24 Dec 2025 50th CommandLeo 🇮🇹 940 101 17ms 26 Dec 2025 50th Pyroan 940 101 15ms 27 Dec 2025 50th cros107 🇦🇺 940 101 16ms 28 Dec 2025 50th davecame 940 101 16ms 2 Jan 2026 50th zhaohm14 940 101 16ms 9 Jan 2026 50th plcc0 940 101 17ms 18 Feb 2026 50th madex 🇩🇪 940 101 16ms 8 days ago 66th ovs-code 🇩🇪 935 87 451ms 18 Dec 2025 66th JayXon 🇺🇸 935 87 426ms 1 Jan 2026 66th Steffan153 🇫🇮 935 87 475ms 38 hours ago 69th CLOStrophobic 🇮🇹 931 102 16ms 19 Jan 2025 70th bricknellj 922 103 16ms 20 Nov 2025 70th BREMAUCY 🇫🇷 922 103 15ms 18 Dec 2025 70th luuumine 🇫🇷 922 103 16ms 19 Dec 2025 70th andrewjc2000 922 103 16ms 5 Jan 2026 70th StefanHabel 🇨🇦 922 103 15ms 1 Feb 2026 75th emplv 🇱🇻 910 168 12ms 10 Jan 2026 76th inventshah 904 105 16ms 31 Dec 2025 76th Artemis21 🇬🇧 904 105 16ms 22 Jan 2026 76th aksyristos 904 105 16ms 13 Feb 2026 76th JOrE20 904 105 16ms 15 Feb 2026 80th nwellnhof 🇩🇪 902 125 37ms 1 Jan 2026 1–80 of 369 Next Last
