The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 157th error256 0 67 111ms 30 Jan 2026 157th CaedenHarper 🇨🇦 0 67 553ms 6 days ago 157th fuzzylojik-golf 🇺🇸 0 67 490ms 3 days ago 157th HumanoidCPU 0 67 577ms 2 days ago 157th madex 🇩🇪 0 67 9ms 12 hours ago 166th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 166th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 166th Yax42 🇫🇷 0 68 16ms 3 days ago 169th khvdm 0 69 137ms 13 Jan 2025 169th 4atj 0 69 1,062ms 21 May 2025 169th albanian-laundromat 0 69 533ms 6 Dec 2025 169th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 169th albanian-laundromat 0 69 380ms 22 Feb 2026 169th error256 0 69 410ms 4 days ago 169th edsrzf 🇳🇿 0 69 394ms 2 days ago 176th btnlq 0 70 193ms 4 Dec 2024 176th error256 0 70 129ms 15 Jan 2026 176th error256 0 70 18ms 14 days ago 176th Seek64 🇩🇪 0 70 116ms 3 days ago 176th DialFrost 🇸🇬 0 70 116ms 28 hours ago 181st GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 181st GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 181st GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 181st ovs-code 🇩🇪 0 71 134ms 3 days ago 181st edsrzf 🇳🇿 0 71 18ms 2 days ago 181st kg583 🇺🇸 0 71 18ms 2 days ago 181st rhdqor213 0 71 4ms 2 days ago 181st ovs-code 🇩🇪 0 71 129ms 28 hours ago 189th dokutan 0 72 525ms 15 Aug 2025 189th rucin93 🇵🇱 0 72 9ms 20 days ago 189th aksyristos 0 72 247ms 15 days ago 189th blaztoma 🇱🇹 0 72 123ms 3 days ago 189th Emutis 🇱🇹 0 72 121ms 3 days ago 189th KasperKivimaeki 🇫🇮 0 72 4ms 3 days ago 189th edsrzf 🇳🇿 0 72 9ms 2 days ago 189th zacjl 0 72 131ms 40 hours ago 189th Steffan153 🇫🇮 0 72 3ms 29 hours ago 198th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 198th Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 200th saito-ta 🇯🇵 0 74 3ms 11 May 2025 200th error256 0 74 3ms 12 Jan 2026 200th lukegustafson 🇺🇸 0 74 189ms 18 days ago 200th albanian-laundromat 0 74 9ms 10 days ago 204th kg583 🇺🇸 0 75 38ms 1 Dec 2024 204th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 204th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 204th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 204th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 204th albanian-laundromat 0 75 108ms 5 Jan 2026 204th albanian-laundromat 0 75 455ms 6 Jan 2026 204th GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 204th albanian-laundromat 0 75 238ms 24 days ago 204th madex 🇩🇪 0 75 34ms 8 days ago 204th CaedenHarper 🇨🇦 0 75 149ms 6 days ago 204th fuzzylojik-golf 🇺🇸 0 75 123ms 3 days ago 204th Yax42 🇫🇷 0 75 4ms 3 days ago 204th edsrzf 🇳🇿 0 75 17ms 2 days ago 204th plcc0 0 75 22ms 2 days ago 204th zgialor-lab 0 75 25ms 2 days ago 204th ndren 0 75 19ms 26 hours ago 204th madex 🇩🇪 0 75 439ms 12 hours ago 204th CornerMercury 🇬🇧 0 75 19ms 3 hours ago 223rd Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 223rd ovs-code 🇩🇪 0 76 3ms 10 May 2025 223rd AlephSquirrel 0 76 43ms 3 Dec 2025 223rd AlephSquirrel 0 76 445ms 3 Dec 2025 223rd albanian-laundromat 0 76 18ms 24 days ago 223rd albanian-laundromat 0 76 188ms 18 days ago 223rd MeWhenI 🇻🇦 0 76 586ms 11 days ago 223rd MeWhenI 🇻🇦 0 76 184ms 45 hours ago 223rd duckyluuk 🇳🇱 0 76 128ms 29 hours ago 232nd lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 232nd Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 232nd DialFrost 🇸🇬 0 77 18ms 8 May 2025 232nd emgordon154 0 77 161ms 9 May 2025 232nd Natanaelel 🇸🇪 0 77 3ms 11 May 2025 232nd addmai 0 77 20ms 24 Jul 2025 232nd hiichbindermax 0 77 19ms 17 Aug 2025 232nd 5cw 🇺🇸 0 77 18ms 22 Aug 2025 232nd davecame 0 77 135ms 25 Sep 2025 First Prev 161–240 of 384 Next Last