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?
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 160th IanUtley 0 59 18ms 8 May 2025 160th GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 163rd pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 163rd fuzzylojik-golf 🇺🇸 0 60 16ms 9 hours ago 165th GolfingSuccess 🇬🇷 0 61 2,468ms 8 May 2025 165th madex 🇩🇪 0 61 2,598ms 3 days ago 167th AlephSquirrel 0 62 15ms 25 Nov 2024 167th btnlq 0 62 15ms 4 Dec 2024 167th Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 167th Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 167th ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 167th bricknellj 0 62 16ms 30 Jan 2025 167th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 167th error256 0 62 16ms 12 Apr 2025 167th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 167th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 167th 4atj 0 62 16ms 9 May 2025 167th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 167th hiichbindermax 0 62 18ms 17 Aug 2025 167th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 167th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 167th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 167th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 167th GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 167th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 167th lukegustafson 🇺🇸 0 62 36ms 15 days ago 167th aksyristos 0 62 14ms 12 days ago 167th madex 🇩🇪 0 62 15ms 4 days ago 167th CaedenHarper 🇨🇦 0 62 16ms 2 days ago 167th KatieLG 🇬🇧 0 62 17ms 12 hours ago 167th KatieLG 🇬🇧 0 62 416ms 12 hours ago 167th scpchicken 🇵🇼 0 62 15ms 12 hours ago 167th StefanHabel 🇨🇦 0 62 15ms 5 hours ago 167th blaztoma 🇱🇹 0 62 15ms 3 hours ago 167th Emutis 🇱🇹 0 62 16ms 74 mins ago 196th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 196th albanian-laundromat 0 63 44ms 14 Jan 2026 198th jameswmccarty 0 64 15ms 29 Mar 2025 198th dokutan 0 64 63ms 8 Feb 2026 198th albanian-laundromat 0 64 188ms 2 days ago 201st Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 201st rucin93 🇵🇱 0 66 6ms 8 May 2025 201st sean-niemann 🇺🇸 0 66 7ms 8 May 2025 201st AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 201st namelessiw 0 66 434ms 2 Nov 2025 201st GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 201st albanian-laundromat 0 66 1,391ms 2 days ago 201st Yax42 🇫🇷 0 66 484ms 21 hours ago 201st fuzzylojik-golf 🇺🇸 0 66 456ms 10 hours ago 210th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 211th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 211th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 211th edsrzf 🇳🇿 0 68 113ms 25 May 2025 211th GolfingSuccess 🇬🇷 0 68 110ms 35 hours ago 215th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 215th CaedenHarper 🇨🇦 0 69 486ms 37 hours ago 217th JOrE20 0 70 41ms 13 Feb 2026 218th kg583 🇺🇸 0 71 27ms 1 Dec 2024 218th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 218th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 218th edsrzf 🇳🇿 0 71 14ms 8 May 2025 218th AlephSquirrel 0 71 13ms 9 May 2025 223rd Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 224th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 225th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 225th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 227th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 227th fuzzylojik-golf 🇺🇸 0 76 104ms 10 hours ago 227th edsrzf 🇳🇿 0 76 131ms 86 mins ago 230th rucin93 🇵🇱 0 77 130ms 8 May 2025 230th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 232nd saito-ta 🇯🇵 0 78 4ms 10 May 2025 232nd rhdqor213 0 78 4ms 10 May 2025 232nd albanian-laundromat 0 78 100ms 2 days ago 235th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 236th kumavale 0 81 156ms 26 Nov 2025 236th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 236th albanian-laundromat 0 81 46ms 2 days ago 239th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 239th emgordon154 0 82 162ms 14 Feb 2026 First Prev 161–240 of 318 Next Last