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 76th Natanaelel 🇸🇪 0 51 34ms 32 hours ago 76th CaedenHarper 🇨🇦 0 51 882ms 23 hours ago 83rd Shanethegamer 🇺🇸 0 52 1,314ms 13 Dec 2024 84th albanian-laundromat 0 53 892ms 6 Dec 2025 84th pardouin 🇫🇷 0 53 2,732ms 19 Feb 2026 84th edsrzf 🇳🇿 0 53 2,777ms 17 hours ago 87th Shanethegamer 🇺🇸 0 54 41ms 13 Dec 2024 87th error256 0 54 28ms 2 May 2025 87th albanian-laundromat 0 54 2,676ms 18 Feb 2026 87th emgordon154 0 54 41ms 41 hours ago 87th MeWhenI 🇻🇦 0 54 50ms 19 hours ago 87th ComradeSquirrel 0 54 40ms 13 hours ago 87th helbling 🇨🇭 0 54 33ms 3 hours ago 94th error256 0 55 2,813ms 15 Feb 2026 95th kg583 🇺🇸 0 56 562ms 1 Dec 2024 95th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 95th kg583 🇺🇸 0 56 9ms 14 Jan 2026 95th GolfingSuccess 🇬🇷 0 56 488ms 22 Jan 2026 95th Steffan153 🇫🇮 0 56 447ms 19 Feb 2026 95th edsrzf 🇳🇿 0 56 9ms 27 hours ago 95th CaedenHarper 🇨🇦 0 56 12ms 23 hours ago 102nd edsrzf 🇳🇿 0 57 14ms 10 May 2025 102nd pardouin 🇫🇷 0 57 572ms 14 Feb 2026 102nd GolfingSuccess 🇬🇷 0 57 213ms 16 days ago 102nd rucin93 🇵🇱 0 57 211ms 16 days ago 106th sean-niemann 🇺🇸 0 58 163ms 15 Jan 2026 107th lifthrasiir 🇰🇷 0 59 572ms 11 Dec 2024 107th ovs-code 🇩🇪 0 59 413ms 23 Feb 2025 107th error256 0 59 68ms 13 Jan 2026 107th madex 🇩🇪 0 59 2,743ms 4 days ago 111th khvdm 0 60 144ms 13 Jan 2025 111th emgordon154 0 60 379ms 9 May 2025 111th albanian-laundromat 0 60 369ms 22 Feb 2026 111th sean-niemann 🇺🇸 0 60 458ms 3 days ago 111th Seek64 🇩🇪 0 60 125ms 31 hours ago 111th HumanoidCPU 0 60 562ms 23 hours ago 117th DialFrost 🇸🇬 0 61 34ms 24 Feb 2025 117th voytxt 🇨🇿 0 61 28ms 1 Jan 2026 117th albanian-laundromat 0 61 13ms 21 days ago 117th aksyristos 0 61 13ms 7 days ago 121st Andrey-Plotnikov 0 62 36ms 12 Jan 2025 121st XenThe 🇬🇧 0 62 16ms 15 Jul 2025 121st pardouin 🇫🇷 0 62 192ms 14 Feb 2026 121st Steffan153 🇫🇮 0 62 200ms 21 Feb 2026 121st JOrE20 0 62 29ms 26 days ago 121st edsrzf 🇳🇿 0 62 111ms 14 hours ago 127th kg583 🇺🇸 0 63 904ms 1 Dec 2024 127th hallvabo 🇳🇴 0 63 150ms 30 Dec 2024 127th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 127th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 127th rucin93 🇵🇱 0 63 7ms 10 May 2025 127th edsrzf 🇳🇿 0 63 6ms 10 May 2025 127th targrik 0 63 7ms 8 Oct 2025 127th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 127th fuzzylojik-golf 🇺🇸 0 63 142ms 46 hours ago 127th plcc0 0 63 20ms 8 hours ago 137th CornerMercury 🇬🇧 0 64 19ms 3 Dec 2024 137th ndren 0 64 18ms 3 Dec 2024 137th lifthrasiir 🇰🇷 0 64 182ms 11 Dec 2024 137th emgordon154 0 64 19ms 9 May 2025 137th error256 0 64 4,375ms 15 Jan 2026 137th anter69 🇭🇺 0 64 19ms 4 Feb 2026 137th albanian-laundromat 0 64 18ms 22 Feb 2026 137th albanian-laundromat 0 64 547ms 23 Feb 2026 137th HumanoidCPU 0 64 256ms 23 hours ago 146th Shanethegamer 🇺🇸 0 65 257ms 13 Dec 2024 146th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 146th dokutan 0 65 359ms 14 Feb 2026 149th dokutan 0 66 19ms 18 Aug 2025 149th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 149th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 149th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 149th edsrzf 🇳🇿 0 66 11ms 16 hours ago 154th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 154th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 154th namelessiw 0 67 407ms 2 Nov 2025 154th error256 0 67 111ms 30 Jan 2026 154th CaedenHarper 🇨🇦 0 67 553ms 4 days ago 154th fuzzylojik-golf 🇺🇸 0 67 490ms 46 hours ago 160th Yax42 🇫🇷 0 68 16ms 30 hours ago First Prev 81–160 of 333 Next Last