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 albanian-laundromat 0 54 2,676ms 18 Feb 2026 79th emgordon154 0 54 37ms 21 hours ago 83rd error256 0 55 2,813ms 15 Feb 2026 84th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 84th kg583 🇺🇸 0 56 9ms 14 Jan 2026 84th edsrzf 🇳🇿 0 56 9ms 8 hours ago 84th helbling 🇨🇭 0 56 40ms 7 hours ago 84th CaedenHarper 🇨🇦 0 56 14ms 4 hours ago 89th edsrzf 🇳🇿 0 57 13ms 10 May 2025 89th MeWhenI 🇻🇦 0 57 37ms 7 mins ago 91st GolfingSuccess 🇬🇷 0 59 224ms 12 Jan 2026 91st error256 0 59 68ms 13 Jan 2026 91st rucin93 🇵🇱 0 59 200ms 15 days ago 91st madex 🇩🇪 0 59 2,743ms 3 days ago 95th kg583 🇺🇸 0 60 365ms 1 Dec 2024 95th ovs-code 🇩🇪 0 60 413ms 23 Feb 2025 95th GolfingSuccess 🇬🇷 0 60 445ms 11 Jan 2026 95th Steffan153 🇫🇮 0 60 446ms 19 Feb 2026 95th sean-niemann 🇺🇸 0 60 458ms 3 days ago 95th pardouin 🇫🇷 0 60 439ms 11 hours ago 101st DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 101st voytxt 🇨🇿 0 61 62ms 1 Jan 2026 101st albanian-laundromat 0 61 26ms 20 days ago 101st aksyristos 0 61 11ms 6 days ago 105th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 105th sean-niemann 🇺🇸 0 62 167ms 19 May 2025 105th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 105th JOrE20 0 62 28ms 25 days ago 109th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 109th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 109th rucin93 🇵🇱 0 63 7ms 10 May 2025 109th edsrzf 🇳🇿 0 63 6ms 10 May 2025 109th targrik 0 63 7ms 8 Oct 2025 109th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 115th error256 0 64 4,375ms 15 Jan 2026 116th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 117th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 117th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 117th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 120th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 120th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 120th emgordon154 0 67 396ms 9 May 2025 120th namelessiw 0 67 407ms 2 Nov 2025 120th error256 0 67 111ms 30 Jan 2026 120th CaedenHarper 🇨🇦 0 67 553ms 3 days ago 120th fuzzylojik-golf 🇺🇸 0 67 490ms 27 hours ago 120th HumanoidCPU 0 67 577ms 3 hours ago 128th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 128th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 128th Yax42 🇫🇷 0 68 12ms 10 hours ago 131st khvdm 0 69 141ms 13 Jan 2025 131st 4atj 0 69 1,135ms 21 May 2025 131st albanian-laundromat 0 69 533ms 6 Dec 2025 131st GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 131st albanian-laundromat 0 69 380ms 22 Feb 2026 131st error256 0 69 410ms 2 days ago 137th btnlq 0 70 193ms 4 Dec 2024 137th error256 0 70 129ms 15 Jan 2026 137th error256 0 70 18ms 11 days ago 137th Seek64 🇩🇪 0 70 114ms 11 hours ago 141st GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 141st GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 141st GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 141st ovs-code 🇩🇪 0 71 134ms 9 hours ago 141st edsrzf 🇳🇿 0 71 18ms 100 mins ago 141st kg583 🇺🇸 0 71 18ms 9 mins ago 147th edsrzf 🇳🇿 0 72 546ms 9 May 2025 147th dokutan 0 72 525ms 15 Aug 2025 147th rucin93 🇵🇱 0 72 9ms 17 days ago 147th aksyristos 0 72 247ms 13 days ago 147th blaztoma 🇱🇹 0 72 123ms 13 hours ago 147th Emutis 🇱🇹 0 72 121ms 12 hours ago 147th KasperKivimaeki 🇫🇮 0 72 4ms 7 hours ago 154th IISResetMe 0 73 310ms 10 Jan 2026 154th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 154th Steffan153 🇫🇮 0 73 198ms 19 Feb 2026 157th rhdqor213 0 74 3ms 11 May 2025 157th saito-ta 🇯🇵 0 74 3ms 11 May 2025 157th kg583 🇺🇸 0 74 135ms 3 Oct 2025 157th error256 0 74 3ms 12 Jan 2026 First Prev 81–160 of 308 Next Last