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 79th pardouin 🇫🇷 0 53 2,732ms 19 Feb 2026 79th edsrzf 🇳🇿 0 53 2,777ms 46 mins ago 83rd Shanethegamer 🇺🇸 0 54 39ms 13 Dec 2024 83rd error256 0 54 25ms 2 May 2025 83rd albanian-laundromat 0 54 2,676ms 18 Feb 2026 83rd emgordon154 0 54 33ms 25 hours ago 87th error256 0 55 2,813ms 15 Feb 2026 87th MeWhenI 🇻🇦 0 55 50ms 3 hours ago 89th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 89th kg583 🇺🇸 0 56 9ms 14 Jan 2026 89th edsrzf 🇳🇿 0 56 9ms 11 hours ago 89th helbling 🇨🇭 0 56 40ms 10 hours ago 89th CaedenHarper 🇨🇦 0 56 14ms 7 hours ago 94th edsrzf 🇳🇿 0 57 13ms 10 May 2025 94th MeWhenI 🇻🇦 0 57 37ms 3 hours ago 96th GolfingSuccess 🇬🇷 0 59 224ms 12 Jan 2026 96th error256 0 59 68ms 13 Jan 2026 96th rucin93 🇵🇱 0 59 200ms 15 days ago 96th madex 🇩🇪 0 59 2,743ms 3 days ago 100th kg583 🇺🇸 0 60 365ms 1 Dec 2024 100th ovs-code 🇩🇪 0 60 413ms 23 Feb 2025 100th GolfingSuccess 🇬🇷 0 60 445ms 11 Jan 2026 100th Steffan153 🇫🇮 0 60 446ms 19 Feb 2026 100th sean-niemann 🇺🇸 0 60 458ms 3 days ago 100th pardouin 🇫🇷 0 60 439ms 14 hours ago 106th DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 106th voytxt 🇨🇿 0 61 62ms 1 Jan 2026 106th albanian-laundromat 0 61 26ms 21 days ago 106th aksyristos 0 61 11ms 6 days ago 110th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 110th sean-niemann 🇺🇸 0 62 167ms 19 May 2025 110th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 110th JOrE20 0 62 28ms 25 days ago 114th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 114th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 114th rucin93 🇵🇱 0 63 7ms 10 May 2025 114th edsrzf 🇳🇿 0 63 6ms 10 May 2025 114th targrik 0 63 7ms 8 Oct 2025 114th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 120th error256 0 64 4,375ms 15 Jan 2026 121st GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 122nd Yax42 🇫🇷 0 66 470ms 6 Jan 2026 122nd AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 122nd GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 122nd edsrzf 🇳🇿 0 66 11ms 26 mins ago 126th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 126th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 126th emgordon154 0 67 396ms 9 May 2025 126th namelessiw 0 67 407ms 2 Nov 2025 126th error256 0 67 111ms 30 Jan 2026 126th CaedenHarper 🇨🇦 0 67 553ms 3 days ago 126th fuzzylojik-golf 🇺🇸 0 67 490ms 30 hours ago 126th HumanoidCPU 0 67 577ms 7 hours ago 134th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 134th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 134th Yax42 🇫🇷 0 68 12ms 14 hours ago 137th khvdm 0 69 141ms 13 Jan 2025 137th 4atj 0 69 1,135ms 21 May 2025 137th albanian-laundromat 0 69 533ms 6 Dec 2025 137th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 137th albanian-laundromat 0 69 380ms 22 Feb 2026 137th error256 0 69 410ms 2 days ago 143rd btnlq 0 70 193ms 4 Dec 2024 143rd error256 0 70 129ms 15 Jan 2026 143rd error256 0 70 18ms 11 days ago 143rd Seek64 🇩🇪 0 70 114ms 14 hours ago 147th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 147th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 147th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 147th ovs-code 🇩🇪 0 71 134ms 12 hours ago 147th edsrzf 🇳🇿 0 71 18ms 5 hours ago 147th kg583 🇺🇸 0 71 18ms 3 hours ago 153rd dokutan 0 72 525ms 15 Aug 2025 153rd rucin93 🇵🇱 0 72 9ms 17 days ago 153rd aksyristos 0 72 247ms 13 days ago 153rd blaztoma 🇱🇹 0 72 123ms 16 hours ago 153rd Emutis 🇱🇹 0 72 121ms 15 hours ago 153rd KasperKivimaeki 🇫🇮 0 72 4ms 10 hours ago 159th IISResetMe 0 73 310ms 10 Jan 2026 159th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 First Prev 81–160 of 318 Next Last