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 Encoder 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 239th edsrzf 🇳🇿 0 68 113ms 25 May 2025 239th GolfingSuccess 🇬🇷 0 68 110ms 2 days ago 243rd GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 243rd CaedenHarper 🇨🇦 0 69 486ms 2 days ago 245th JOrE20 0 70 41ms 13 Feb 2026 246th kg583 🇺🇸 0 71 27ms 1 Dec 2024 246th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 246th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 246th edsrzf 🇳🇿 0 71 14ms 8 May 2025 246th AlephSquirrel 0 71 13ms 9 May 2025 251st Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 252nd GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 253rd Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 253rd sean-niemann 🇺🇸 0 75 103ms 8 May 2025 253rd HumanoidCPU 0 75 112ms 6 mins ago 256th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 256th fuzzylojik-golf 🇺🇸 0 76 104ms 34 hours ago 256th edsrzf 🇳🇿 0 76 131ms 26 hours ago 256th emgordon154 0 76 115ms 6 hours ago 260th rucin93 🇵🇱 0 77 130ms 8 May 2025 260th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 262nd saito-ta 🇯🇵 0 78 4ms 10 May 2025 262nd rhdqor213 0 78 4ms 10 May 2025 262nd albanian-laundromat 0 78 100ms 3 days ago 265th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 266th kumavale 0 81 156ms 26 Nov 2025 266th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 266th albanian-laundromat 0 81 45ms 3 days ago 269th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 269th emgordon154 0 82 162ms 14 Feb 2026 269th emgordon154 0 82 518ms 8 hours ago 272nd Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 272nd edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 272nd Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 272nd fantaize 0 83 156ms 14 days ago 272nd GolfingSuccess 🇬🇷 0 83 33ms 8 hours ago 277th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 277th ovs-code 🇩🇪 0 84 12ms 10 May 2025 277th fuzzylojik-golf 🇺🇸 0 84 444ms 34 hours ago 277th MeWhenI 🇻🇦 0 84 215ms 9 hours ago 281st edsrzf 🇳🇿 0 85 42ms 8 May 2025 281st edsrzf 🇳🇿 0 85 18ms 9 May 2025 281st error256 0 85 18ms 10 May 2025 281st GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 281st KasperKivimaeki 🇫🇮 0 85 12ms 4 hours ago 286th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 286th kg583 🇺🇸 0 86 39ms 16 Feb 2025 286th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 286th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 286th edsrzf 🇳🇿 0 86 155ms 9 May 2025 286th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 286th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 286th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 286th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 286th elgan65536 🇺🇸 0 86 168ms 24 days ago 286th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 286th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 286th edsrzf 🇳🇿 0 86 414ms 8 hours ago 286th edsrzf 🇳🇿 0 86 8ms 42 mins ago 300th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 300th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 300th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 300th albanian-laundromat 0 87 1,424ms 3 days ago 300th Yax42 🇫🇷 0 87 2,430ms 17 hours ago 305th GolfingSuccess 🇬🇷 0 88 5ms 12 Nov 2025 305th kg583 🇺🇸 0 88 23ms 12 Feb 2026 305th fuzzylojik-golf 🇺🇸 0 88 152ms 32 hours ago 308th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 308th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 308th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 308th CaedenHarper 🇨🇦 0 89 103ms 2 days ago 308th emgordon154 0 89 400ms 9 hours ago 313th Yax42 🇫🇷 0 90 13ms 17 hours ago 314th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 315th namelessiw 0 92 504ms 10 Oct 2025 315th fuzzylojik-golf 🇺🇸 0 92 390ms 33 hours ago 315th madex 🇩🇪 0 92 12ms 12 hours ago 318th edsrzf 🇳🇿 0 93 187ms 17 May 2025 318th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 320th DialFrost 🇸🇬 0 94 13ms 10 May 2025 First Prev 241–320 of 369 Next Last