The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Gray Code Encoder in all languages in chars. 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 Chars Time Submitted 145th Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 145th fuzzylojik-golf 🇺🇸 0 56 17ms 33 hours ago 145th Seek64 🇩🇪 0 56 16ms 24 hours ago 145th BREMAUCY 🇫🇷 0 56 16ms 23 hours ago 145th HumanoidCPU 0 56 15ms 9 hours ago 166th Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 166th sean-niemann 🇺🇸 0 57 176ms 25 May 2025 166th edsrzf 🇳🇿 0 57 167ms 25 May 2025 166th GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 166th Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 166th albanian-laundromat 0 57 296ms 43 hours ago 172nd GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 173rd GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 173rd IanUtley 0 59 18ms 8 May 2025 173rd GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 176th pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 176th fuzzylojik-golf 🇺🇸 0 60 16ms 31 hours ago 176th emgordon154 0 60 3,008ms 5 hours ago 176th edsrzf 🇳🇿 0 60 2,595ms 3 hours ago 180th GolfingSuccess 🇬🇷 0 61 2,438ms 8 May 2025 180th madex 🇩🇪 0 61 2,738ms 4 days ago 182nd AlephSquirrel 0 62 15ms 25 Nov 2024 182nd btnlq 0 62 15ms 4 Dec 2024 182nd Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 182nd Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 182nd ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 182nd bricknellj 0 62 16ms 30 Jan 2025 182nd DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 182nd error256 0 62 16ms 12 Apr 2025 182nd MeWhenI 🇻🇦 0 62 14ms 8 May 2025 182nd Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 182nd 4atj 0 62 16ms 9 May 2025 182nd Natanaelel 🇸🇪 0 62 16ms 11 May 2025 182nd hiichbindermax 0 62 18ms 17 Aug 2025 182nd 5cw 🇺🇸 0 62 15ms 22 Aug 2025 182nd commandz0 🇺🇸 0 62 15ms 27 Aug 2025 182nd SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 182nd KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 182nd GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 182nd Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 182nd lukegustafson 🇺🇸 0 62 36ms 16 days ago 182nd aksyristos 0 62 14ms 13 days ago 182nd madex 🇩🇪 0 62 15ms 5 days ago 182nd CaedenHarper 🇨🇦 0 62 16ms 3 days ago 182nd KatieLG 🇬🇧 0 62 17ms 33 hours ago 182nd KatieLG 🇬🇧 0 62 416ms 33 hours ago 182nd scpchicken 🇵🇼 0 62 15ms 33 hours ago 182nd StefanHabel 🇨🇦 0 62 15ms 27 hours ago 182nd blaztoma 🇱🇹 0 62 15ms 25 hours ago 182nd Emutis 🇱🇹 0 62 16ms 22 hours ago 182nd Andrey2001 0 62 16ms 16 hours ago 182nd anter69 🇭🇺 0 62 15ms 12 hours ago 182nd qpwoeirut 0 62 17ms 4 hours ago 182nd stefangimmillaro 0 62 16ms 3 hours ago 182nd btjones0 0 62 15ms 2 hours ago 216th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 216th albanian-laundromat 0 63 44ms 14 Jan 2026 216th tomh1012 0 63 15ms 20 hours ago 219th jameswmccarty 0 64 15ms 29 Mar 2025 219th dokutan 0 64 63ms 8 Feb 2026 219th albanian-laundromat 0 64 188ms 3 days ago 222nd Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 222nd rucin93 🇵🇱 0 66 6ms 8 May 2025 222nd sean-niemann 🇺🇸 0 66 7ms 8 May 2025 222nd AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 222nd namelessiw 0 66 434ms 2 Nov 2025 222nd GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 222nd albanian-laundromat 0 66 1,391ms 3 days ago 222nd Yax42 🇫🇷 0 66 484ms 42 hours ago 222nd fuzzylojik-golf 🇺🇸 0 66 456ms 31 hours ago 222nd edsrzf 🇳🇿 0 66 7ms 3 hours ago 232nd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 232nd tomh1012 0 67 429ms 20 hours ago 234th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 234th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 234th edsrzf 🇳🇿 0 68 113ms 25 May 2025 234th GolfingSuccess 🇬🇷 0 68 110ms 2 days ago 238th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 238th CaedenHarper 🇨🇦 0 69 486ms 2 days ago 240th JOrE20 0 70 41ms 13 Feb 2026 First Prev 161–240 of 360 Next Last