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 chars. 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 Chars Time Submitted 79th albanian-laundromat 0 54 2,676ms 18 Feb 2026 79th emgordon154 0 54 33ms 23 hours ago 79th MeWhenI 🇻🇦 0 54 50ms 87 mins ago 84th error256 0 55 2,813ms 15 Feb 2026 85th kg583 🇺🇸 0 56 562ms 1 Dec 2024 85th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 85th kg583 🇺🇸 0 56 9ms 14 Jan 2026 85th GolfingSuccess 🇬🇷 0 56 488ms 22 Jan 2026 85th Steffan153 🇫🇮 0 56 447ms 19 Feb 2026 85th edsrzf 🇳🇿 0 56 9ms 9 hours ago 85th helbling 🇨🇭 0 56 40ms 8 hours ago 85th CaedenHarper 🇨🇦 0 56 14ms 5 hours ago 93rd edsrzf 🇳🇿 0 57 13ms 10 May 2025 93rd pardouin 🇫🇷 0 57 572ms 14 Feb 2026 93rd GolfingSuccess 🇬🇷 0 57 213ms 15 days ago 93rd rucin93 🇵🇱 0 57 211ms 15 days ago 93rd MeWhenI 🇻🇦 0 57 37ms 101 mins ago 98th sean-niemann 🇺🇸 0 58 163ms 15 Jan 2026 99th lifthrasiir 🇰🇷 0 59 572ms 11 Dec 2024 99th ovs-code 🇩🇪 0 59 413ms 23 Feb 2025 99th error256 0 59 68ms 13 Jan 2026 99th madex 🇩🇪 0 59 2,743ms 3 days ago 103rd khvdm 0 60 144ms 13 Jan 2025 103rd emgordon154 0 60 379ms 9 May 2025 103rd albanian-laundromat 0 60 369ms 22 Feb 2026 103rd sean-niemann 🇺🇸 0 60 458ms 3 days ago 103rd Seek64 🇩🇪 0 60 125ms 13 hours ago 103rd HumanoidCPU 0 60 562ms 5 hours ago 109th DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 109th voytxt 🇨🇿 0 61 62ms 1 Jan 2026 109th albanian-laundromat 0 61 26ms 20 days ago 109th aksyristos 0 61 11ms 6 days ago 113th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 113th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 113th pardouin 🇫🇷 0 62 192ms 14 Feb 2026 113th Steffan153 🇫🇮 0 62 200ms 21 Feb 2026 113th JOrE20 0 62 28ms 25 days ago 118th kg583 🇺🇸 0 63 904ms 1 Dec 2024 118th hallvabo 🇳🇴 0 63 150ms 30 Dec 2024 118th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 118th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 118th rucin93 🇵🇱 0 63 7ms 10 May 2025 118th edsrzf 🇳🇿 0 63 6ms 10 May 2025 118th targrik 0 63 7ms 8 Oct 2025 118th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 118th fuzzylojik-golf 🇺🇸 0 63 142ms 28 hours ago 127th CornerMercury 🇬🇧 0 64 19ms 3 Dec 2024 127th ndren 0 64 18ms 3 Dec 2024 127th lifthrasiir 🇰🇷 0 64 182ms 11 Dec 2024 127th emgordon154 0 64 19ms 9 May 2025 127th error256 0 64 4,375ms 15 Jan 2026 127th anter69 🇭🇺 0 64 19ms 4 Feb 2026 127th albanian-laundromat 0 64 18ms 22 Feb 2026 127th albanian-laundromat 0 64 547ms 23 Feb 2026 127th HumanoidCPU 0 64 256ms 5 hours ago 136th Shanethegamer 🇺🇸 0 65 257ms 13 Dec 2024 136th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 136th dokutan 0 65 359ms 14 Feb 2026 139th dokutan 0 66 19ms 18 Aug 2025 139th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 139th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 139th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 143rd Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 143rd Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 143rd namelessiw 0 67 407ms 2 Nov 2025 143rd error256 0 67 111ms 30 Jan 2026 143rd CaedenHarper 🇨🇦 0 67 553ms 3 days ago 143rd fuzzylojik-golf 🇺🇸 0 67 490ms 28 hours ago 149th Yax42 🇫🇷 0 68 12ms 12 hours ago 150th 4atj 0 69 1,159ms 21 May 2025 150th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 150th error256 0 69 410ms 2 days ago 153rd btnlq 0 70 193ms 4 Dec 2024 153rd kg583 🇺🇸 0 70 128ms 3 Oct 2025 153rd error256 0 70 133ms 15 Jan 2026 153rd error256 0 70 18ms 11 days ago 157th GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 157th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 157th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 157th ovs-code 🇩🇪 0 71 134ms 10 hours ago First Prev 81–160 of 310 Next Last