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?
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 399th ovs-code 🇩🇪 0 88 167ms 49 mins ago 402nd Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 402nd Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 402nd DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 402nd CaedenHarper 🇨🇦 0 89 103ms 6 days ago 402nd madex 🇩🇪 0 89 174ms 2 days ago 402nd edsrzf 🇳🇿 0 89 334ms 2 days ago 402nd Yax42 🇫🇷 0 89 13ms 2 days ago 402nd dokutan 0 89 476ms 47 hours ago 410th solisolu 0 90 4ms 11 hours ago 410th h3ra993huskp 🇯🇵 0 90 434ms 5 hours ago 412th namelessiw 0 92 504ms 10 Oct 2025 412th fuzzylojik-golf 🇺🇸 0 92 383ms 5 days ago 412th madex 🇩🇪 0 92 12ms 4 days ago 415th CaedenHarper 🇨🇦 0 93 13ms 7 days ago 415th DialFrost 🇸🇬 0 93 13ms 39 hours ago 417th edsrzf 🇳🇿 0 94 187ms 17 May 2025 417th edsrzf 🇳🇿 0 94 21ms 3 days ago 419th Yax42 🇫🇷 0 95 389ms 4 days ago 420th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 420th HumanoidCPU 0 96 166ms 4 days ago 422nd HumanoidCPU 0 97 7ms 2 days ago 423rd Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 424th snydej 0 99 43ms 22 Nov 2024 424th albanian-laundromat 0 99 343ms 7 days ago 424th dokutan 0 99 409ms 3 days ago 424th dokutan 0 99 12ms 47 hours ago 428th dokutan 0 100 19ms 3 days ago 429th HumanoidCPU 0 101 361ms 3 days ago 429th HumanoidCPU 0 101 382ms 3 days ago 431st sean-niemann 🇺🇸 0 102 286ms 8 May 2025 431st Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 431st edsrzf 🇳🇿 0 102 295ms 9 May 2025 431st GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 431st ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 431st CaedenHarper 🇨🇦 0 102 301ms 7 days ago 431st fuzzylojik-golf 🇺🇸 0 102 292ms 5 days ago 431st emgordon154 0 102 274ms 4 days ago 431st edsrzf 🇳🇿 0 102 341ms 3 days ago 431st Steffan153 🇫🇮 0 102 338ms 2 days ago 431st Steffan153 🇫🇮 0 102 284ms 2 days ago 431st MeWhenI 🇻🇦 0 102 287ms 2 days ago 443rd lukechampine 0 103 301ms 7 Jun 2025 443rd chris124567 0 103 294ms 8 Jun 2025 443rd albanian-laundromat 0 103 270ms 16 Dec 2025 443rd GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 443rd HumanoidCPU 0 103 329ms 3 days ago 443rd Jacob385 0 103 411ms 16 hours ago 449th madex 🇩🇪 0 104 226ms 2 days ago 450th madex 🇩🇪 0 106 334ms 14 hours ago 451st UnderKoen 🇳🇱 0 107 2,121ms 3 days ago 452nd HumanoidCPU 0 108 13ms 2 days ago 453rd edsrzf 🇳🇿 0 109 21ms 3 days ago 453rd emgordon154 0 109 84ms 2 days ago 455th kg583 🇺🇸 0 110 14ms 12 Jan 2026 455th Steffan153 🇫🇮 0 110 28ms 2 days ago 455th edsrzf 🇳🇿 0 110 31ms 2 days ago 458th GolfingSuccess 🇬🇷 0 111 107ms 3 days ago 459th retrohun 0 112 16ms 4 days ago 459th edsrzf 🇳🇿 0 112 27ms 3 days ago 459th madex 🇩🇪 0 112 1,387ms 14 hours ago 462nd prestosilver 🇺🇸 0 115 418ms 4 days ago 462nd HumanoidCPU 0 115 260ms 3 days ago 464th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 465th madex 🇩🇪 0 118 17ms 14 hours ago 466th not-a-pokemon 0 119 15ms 3 days ago 467th madex 🇩🇪 0 121 366ms 14 hours ago 468th edsrzf 🇳🇿 0 127 58ms 3 days ago 468th Steffan153 🇫🇮 0 127 57ms 2 days ago 470th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 471st CaedenHarper 🇨🇦 0 129 446ms 7 days ago 472nd Natanaelel 🇸🇪 0 130 360ms 2 May 2025 472nd madex 🇩🇪 0 130 412ms 2 days ago 472nd madex 🇩🇪 0 130 269ms 15 hours ago 475th edsrzf 🇳🇿 0 134 22ms 3 days ago 476th GolfingSuccess 🇬🇷 0 135 80ms 45 hours ago 477th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 478th albanian-laundromat 0 137 27ms 7 days ago 479th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 480th dokutan 0 140 279ms 35 hours ago First Prev 401–480 of 500 Next Last