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 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 GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 81st kg583 🇺🇸 0 56 9ms 14 Jan 2026 81st edsrzf 🇳🇿 0 56 9ms 56 mins ago 81st helbling 🇨🇭 0 56 40ms 5 mins ago 85th edsrzf 🇳🇿 0 57 13ms 10 May 2025 86th GolfingSuccess 🇬🇷 0 59 224ms 12 Jan 2026 86th error256 0 59 68ms 13 Jan 2026 86th rucin93 🇵🇱 0 59 200ms 15 days ago 86th madex 🇩🇪 0 59 2,743ms 3 days ago 90th kg583 🇺🇸 0 60 365ms 1 Dec 2024 90th ovs-code 🇩🇪 0 60 413ms 23 Feb 2025 90th GolfingSuccess 🇬🇷 0 60 445ms 11 Jan 2026 90th Steffan153 🇫🇮 0 60 446ms 19 Feb 2026 90th sean-niemann 🇺🇸 0 60 458ms 2 days ago 90th pardouin 🇫🇷 0 60 439ms 3 hours ago 96th DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 96th voytxt 🇨🇿 0 61 62ms 1 Jan 2026 96th albanian-laundromat 0 61 26ms 20 days ago 96th aksyristos 0 61 11ms 6 days ago 100th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 100th sean-niemann 🇺🇸 0 62 167ms 19 May 2025 100th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 100th JOrE20 0 62 28ms 25 days ago 104th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 104th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 104th rucin93 🇵🇱 0 63 7ms 10 May 2025 104th edsrzf 🇳🇿 0 63 6ms 10 May 2025 104th targrik 0 63 7ms 8 Oct 2025 104th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 110th error256 0 64 4,375ms 15 Jan 2026 111th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 112th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 112th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 112th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 115th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 115th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 115th emgordon154 0 67 396ms 9 May 2025 115th namelessiw 0 67 407ms 2 Nov 2025 115th error256 0 67 111ms 30 Jan 2026 115th CaedenHarper 🇨🇦 0 67 553ms 3 days ago 115th fuzzylojik-golf 🇺🇸 0 67 490ms 20 hours ago 122nd lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 122nd Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 122nd Yax42 🇫🇷 0 68 12ms 3 hours ago 125th khvdm 0 69 141ms 13 Jan 2025 125th 4atj 0 69 1,135ms 21 May 2025 125th albanian-laundromat 0 69 533ms 6 Dec 2025 125th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 125th albanian-laundromat 0 69 380ms 22 Feb 2026 125th error256 0 69 410ms 47 hours ago 131st btnlq 0 70 193ms 4 Dec 2024 131st error256 0 70 129ms 15 Jan 2026 131st error256 0 70 18ms 11 days ago 131st Seek64 🇩🇪 0 70 114ms 4 hours ago 135th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 135th GolfingSuccess 🇬🇷 0 71 25ms 12 Jan 2026 135th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 135th ovs-code 🇩🇪 0 71 134ms 119 mins ago 139th edsrzf 🇳🇿 0 72 546ms 9 May 2025 139th dokutan 0 72 525ms 15 Aug 2025 139th kg583 🇺🇸 0 72 18ms 2 Oct 2025 139th rucin93 🇵🇱 0 72 9ms 17 days ago 139th aksyristos 0 72 247ms 12 days ago 139th blaztoma 🇱🇹 0 72 123ms 6 hours ago 139th Emutis 🇱🇹 0 72 121ms 5 hours ago 139th KasperKivimaeki 🇫🇮 0 72 4ms 31 mins ago 147th IISResetMe 0 73 429ms 10 Jan 2026 147th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 147th Steffan153 🇫🇮 0 73 198ms 19 Feb 2026 150th rhdqor213 0 74 3ms 11 May 2025 150th saito-ta 🇯🇵 0 74 3ms 11 May 2025 150th kg583 🇺🇸 0 74 135ms 3 Oct 2025 150th error256 0 74 3ms 12 Jan 2026 150th lukegustafson 🇺🇸 0 74 190ms 15 days ago 150th albanian-laundromat 0 74 9ms 7 days ago 156th kg583 🇺🇸 0 75 124ms 1 Dec 2024 156th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 156th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 156th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 156th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 First Prev 81–160 of 297 Next Last