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 Decoder 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 81st Shanethegamer 🇺🇸 0 54 39ms 13 Dec 2024 81st error256 0 54 25ms 2 May 2025 81st albanian-laundromat 0 54 2,676ms 18 Feb 2026 81st emgordon154 0 54 33ms 23 hours ago 85th error256 0 55 2,813ms 15 Feb 2026 85th MeWhenI 🇻🇦 0 55 50ms 88 mins ago 87th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 87th kg583 🇺🇸 0 56 9ms 14 Jan 2026 87th edsrzf 🇳🇿 0 56 9ms 9 hours ago 87th helbling 🇨🇭 0 56 40ms 8 hours ago 87th CaedenHarper 🇨🇦 0 56 14ms 5 hours ago 92nd edsrzf 🇳🇿 0 57 13ms 10 May 2025 92nd MeWhenI 🇻🇦 0 57 37ms 101 mins ago 94th GolfingSuccess 🇬🇷 0 59 224ms 12 Jan 2026 94th error256 0 59 68ms 13 Jan 2026 94th rucin93 🇵🇱 0 59 200ms 15 days ago 94th madex 🇩🇪 0 59 2,743ms 3 days ago 98th kg583 🇺🇸 0 60 365ms 1 Dec 2024 98th ovs-code 🇩🇪 0 60 413ms 23 Feb 2025 98th GolfingSuccess 🇬🇷 0 60 445ms 11 Jan 2026 98th Steffan153 🇫🇮 0 60 446ms 19 Feb 2026 98th sean-niemann 🇺🇸 0 60 458ms 3 days ago 98th pardouin 🇫🇷 0 60 439ms 12 hours ago 104th DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 104th voytxt 🇨🇿 0 61 62ms 1 Jan 2026 104th albanian-laundromat 0 61 26ms 20 days ago 104th aksyristos 0 61 11ms 6 days ago 108th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 108th sean-niemann 🇺🇸 0 62 167ms 19 May 2025 108th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 108th JOrE20 0 62 28ms 25 days ago 112th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 112th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 112th rucin93 🇵🇱 0 63 7ms 10 May 2025 112th edsrzf 🇳🇿 0 63 6ms 10 May 2025 112th targrik 0 63 7ms 8 Oct 2025 112th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 118th error256 0 64 4,375ms 15 Jan 2026 119th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 120th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 120th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 120th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 123rd Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 123rd Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 123rd emgordon154 0 67 396ms 9 May 2025 123rd namelessiw 0 67 407ms 2 Nov 2025 123rd error256 0 67 111ms 30 Jan 2026 123rd CaedenHarper 🇨🇦 0 67 553ms 3 days ago 123rd fuzzylojik-golf 🇺🇸 0 67 490ms 28 hours ago 123rd HumanoidCPU 0 67 577ms 5 hours ago 131st lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 131st Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 131st Yax42 🇫🇷 0 68 12ms 12 hours ago 134th khvdm 0 69 141ms 13 Jan 2025 134th 4atj 0 69 1,135ms 21 May 2025 134th albanian-laundromat 0 69 533ms 6 Dec 2025 134th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 134th albanian-laundromat 0 69 380ms 22 Feb 2026 134th error256 0 69 410ms 2 days ago 140th btnlq 0 70 193ms 4 Dec 2024 140th error256 0 70 129ms 15 Jan 2026 140th error256 0 70 18ms 11 days ago 140th Seek64 🇩🇪 0 70 114ms 13 hours ago 144th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 144th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 144th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 144th ovs-code 🇩🇪 0 71 134ms 10 hours ago 144th edsrzf 🇳🇿 0 71 18ms 3 hours ago 144th kg583 🇺🇸 0 71 18ms 103 mins ago 150th edsrzf 🇳🇿 0 72 546ms 9 May 2025 150th dokutan 0 72 525ms 15 Aug 2025 150th rucin93 🇵🇱 0 72 9ms 17 days ago 150th aksyristos 0 72 247ms 13 days ago 150th blaztoma 🇱🇹 0 72 123ms 14 hours ago 150th Emutis 🇱🇹 0 72 121ms 13 hours ago 150th KasperKivimaeki 🇫🇮 0 72 4ms 9 hours ago 157th IISResetMe 0 73 310ms 10 Jan 2026 157th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 157th Steffan153 🇫🇮 0 73 1,278ms 19 Feb 2026 160th rhdqor213 0 74 3ms 11 May 2025 First Prev 81–160 of 312 Next Last