The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 38 hours. 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 160th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 160th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 160th edsrzf 🇳🇿 0 66 11ms 5 days ago 160th Steffan153 🇫🇮 0 66 10ms 4 days ago 160th plcc0 0 66 463ms 3 days ago 166th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 166th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 166th emgordon154 0 67 396ms 9 May 2025 166th namelessiw 0 67 407ms 2 Nov 2025 166th error256 0 67 111ms 30 Jan 2026 166th CaedenHarper 🇨🇦 0 67 553ms 8 days ago 166th fuzzylojik-golf 🇺🇸 0 67 490ms 6 days ago 166th HumanoidCPU 0 67 577ms 5 days ago 166th madex 🇩🇪 0 67 9ms 3 days ago 166th emplv 🇱🇻 0 67 6ms 44 hours ago 176th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 176th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 176th Yax42 🇫🇷 0 68 16ms 5 days ago 179th khvdm 0 69 137ms 13 Jan 2025 179th 4atj 0 69 1,062ms 21 May 2025 179th albanian-laundromat 0 69 533ms 6 Dec 2025 179th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 179th albanian-laundromat 0 69 380ms 22 Feb 2026 179th error256 0 69 410ms 7 days ago 179th edsrzf 🇳🇿 0 69 394ms 5 days ago 186th btnlq 0 70 193ms 4 Dec 2024 186th error256 0 70 129ms 15 Jan 2026 186th error256 0 70 18ms 16 days ago 186th Seek64 🇩🇪 0 70 116ms 5 days ago 186th DialFrost 🇸🇬 0 70 116ms 3 days ago 186th madex 🇩🇪 0 70 485ms 35 hours ago 192nd GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 192nd GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 192nd GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 192nd ovs-code 🇩🇪 0 71 134ms 5 days ago 192nd edsrzf 🇳🇿 0 71 18ms 5 days ago 192nd kg583 🇺🇸 0 71 18ms 5 days ago 192nd rhdqor213 0 71 4ms 5 days ago 192nd ovs-code 🇩🇪 0 71 129ms 3 days ago 192nd Steffan153 🇫🇮 0 71 17ms 4 hours ago 201st dokutan 0 72 525ms 15 Aug 2025 201st rucin93 🇵🇱 0 72 9ms 22 days ago 201st aksyristos 0 72 247ms 18 days ago 201st blaztoma 🇱🇹 0 72 123ms 5 days ago 201st Emutis 🇱🇹 0 72 121ms 5 days ago 201st KasperKivimaeki 🇫🇮 0 72 4ms 5 days ago 201st edsrzf 🇳🇿 0 72 9ms 5 days ago 201st zacjl 0 72 131ms 4 days ago 201st Steffan153 🇫🇮 0 72 3ms 3 days ago 201st Steffan153 🇫🇮 0 72 9ms 4 hours ago 211th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 211th Steffan153 🇫🇮 0 73 1,300ms 19 Feb 2026 213th saito-ta 🇯🇵 0 74 3ms 11 May 2025 213th error256 0 74 3ms 12 Jan 2026 213th lukegustafson 🇺🇸 0 74 189ms 21 days ago 213th albanian-laundromat 0 74 9ms 13 days ago 217th kg583 🇺🇸 0 75 38ms 1 Dec 2024 217th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 217th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 217th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 217th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 217th albanian-laundromat 0 75 108ms 5 Jan 2026 217th albanian-laundromat 0 75 455ms 6 Jan 2026 217th GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 217th albanian-laundromat 0 75 238ms 27 days ago 217th madex 🇩🇪 0 75 34ms 11 days ago 217th CaedenHarper 🇨🇦 0 75 149ms 8 days ago 217th fuzzylojik-golf 🇺🇸 0 75 123ms 6 days ago 217th Yax42 🇫🇷 0 75 4ms 5 days ago 217th edsrzf 🇳🇿 0 75 17ms 5 days ago 217th plcc0 0 75 22ms 4 days ago 217th zgialor-lab 0 75 25ms 4 days ago 217th ndren 0 75 19ms 3 days ago 217th madex 🇩🇪 0 75 439ms 3 days ago 217th CornerMercury 🇬🇧 0 75 19ms 2 days ago 217th DialFrost 🇸🇬 0 75 25ms 17 hours ago 237th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 237th ovs-code 🇩🇪 0 76 4ms 10 May 2025 237th AlephSquirrel 0 76 43ms 3 Dec 2025 237th AlephSquirrel 0 76 445ms 3 Dec 2025 First Prev 161–240 of 416 Next Last