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 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 151st ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 151st khvdm 0 62 15ms 12 Jan 2025 151st bricknellj 0 62 16ms 30 Jan 2025 151st DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 151st pardouin 🇫🇷 0 62 14ms 24 Feb 2025 151st error256 0 62 16ms 12 Apr 2025 151st MeWhenI 🇻🇦 0 62 14ms 8 May 2025 151st Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 151st sean-niemann 🇺🇸 0 62 16ms 8 May 2025 151st 4atj 0 62 16ms 9 May 2025 151st emgordon154 0 62 16ms 9 May 2025 151st Natanaelel 🇸🇪 0 62 16ms 11 May 2025 151st dokutan 0 62 14ms 15 Aug 2025 151st hiichbindermax 0 62 18ms 17 Aug 2025 151st 5cw 🇺🇸 0 62 15ms 22 Aug 2025 151st commandz0 🇺🇸 0 62 15ms 27 Aug 2025 151st SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 151st KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 151st albanian-laundromat 0 62 16ms 2 Dec 2025 151st GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 151st Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 151st Steffan153 🇫🇮 0 62 16ms 19 Feb 2026 151st lukegustafson 🇺🇸 0 62 36ms 15 days ago 151st aksyristos 0 62 14ms 12 days ago 151st madex 🇩🇪 0 62 15ms 4 days ago 151st CaedenHarper 🇨🇦 0 62 16ms 2 days ago 151st KatieLG 🇬🇧 0 62 17ms 13 hours ago 151st KatieLG 🇬🇧 0 62 416ms 13 hours ago 151st scpchicken 🇵🇼 0 62 15ms 13 hours ago 151st fuzzylojik-golf 🇺🇸 0 62 15ms 12 hours ago 151st StefanHabel 🇨🇦 0 62 15ms 6 hours ago 151st Seek64 🇩🇪 0 62 15ms 5 hours ago 151st blaztoma 🇱🇹 0 62 15ms 4 hours ago 151st BREMAUCY 🇫🇷 0 62 16ms 2 hours ago 151st Emutis 🇱🇹 0 62 16ms 2 hours ago 196th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 196th albanian-laundromat 0 63 44ms 14 Jan 2026 196th tomh1012 0 63 15ms 19 mins ago 199th jameswmccarty 0 64 15ms 29 Mar 2025 199th 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 22 hours ago 201st fuzzylojik-golf 🇺🇸 0 66 456ms 11 hours ago 210th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 210th tomh1012 0 67 480ms 15 mins ago 212th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 212th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 212th edsrzf 🇳🇿 0 68 113ms 25 May 2025 212th GolfingSuccess 🇬🇷 0 68 110ms 36 hours ago 216th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 216th CaedenHarper 🇨🇦 0 69 486ms 38 hours ago 218th JOrE20 0 70 41ms 13 Feb 2026 219th kg583 🇺🇸 0 71 27ms 1 Dec 2024 219th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 219th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 219th edsrzf 🇳🇿 0 71 14ms 8 May 2025 219th AlephSquirrel 0 71 13ms 9 May 2025 224th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 224th dokutan 0 72 62ms 8 Feb 2026 226th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 227th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 227th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 229th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 229th fuzzylojik-golf 🇺🇸 0 76 104ms 11 hours ago 229th edsrzf 🇳🇿 0 76 131ms 2 hours ago 232nd rucin93 🇵🇱 0 77 130ms 8 May 2025 232nd ovs-code 🇩🇪 0 77 81ms 30 May 2025 232nd Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 235th saito-ta 🇯🇵 0 78 4ms 10 May 2025 235th rhdqor213 0 78 4ms 10 May 2025 235th albanian-laundromat 0 78 100ms 2 days ago 238th GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 239th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 240th kumavale 0 81 156ms 26 Nov 2025 First Prev 161–240 of 322 Next Last