The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 203rd zacjl 0 62 17ms 6 hours ago 203rd MeWhenI 🇻🇦 0 62 86ms 5 hours ago 203rd ComradeSquirrel 0 62 14ms 3 hours ago 244th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 244th albanian-laundromat 0 63 44ms 14 Jan 2026 244th tomh1012 0 63 15ms 46 hours ago 244th MeWhenI 🇻🇦 0 63 204ms 14 hours ago 248th jameswmccarty 0 64 15ms 29 Mar 2025 248th dokutan 0 64 63ms 8 Feb 2026 248th albanian-laundromat 0 64 188ms 4 days ago 248th zgialor-lab 0 64 16ms 17 hours ago 252nd JDiLenarda 🇫🇷 0 65 1,347ms 20 hours ago 253rd Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 253rd rucin93 🇵🇱 0 66 6ms 8 May 2025 253rd sean-niemann 🇺🇸 0 66 7ms 8 May 2025 253rd AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 253rd namelessiw 0 66 434ms 2 Nov 2025 253rd GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 253rd albanian-laundromat 0 66 1,391ms 4 days ago 253rd Yax42 🇫🇷 0 66 484ms 2 days ago 253rd fuzzylojik-golf 🇺🇸 0 66 456ms 2 days ago 253rd edsrzf 🇳🇿 0 66 7ms 29 hours ago 253rd edsrzf 🇳🇿 0 66 1,345ms 13 hours ago 253rd edsrzf 🇳🇿 0 66 451ms 79 mins ago 265th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 265th tomh1012 0 67 429ms 46 hours ago 267th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 267th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 267th edsrzf 🇳🇿 0 68 113ms 25 May 2025 267th GolfingSuccess 🇬🇷 0 68 110ms 3 days ago 267th fuzzylojik-golf 🇺🇸 0 68 1,320ms 18 hours ago 272nd GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 272nd CaedenHarper 🇨🇦 0 69 486ms 3 days ago 274th JOrE20 0 70 41ms 13 Feb 2026 275th kg583 🇺🇸 0 71 27ms 1 Dec 2024 275th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 275th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 275th edsrzf 🇳🇿 0 71 14ms 8 May 2025 275th AlephSquirrel 0 71 13ms 9 May 2025 280th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 281st GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 281st GolfingSuccess 🇬🇷 0 73 8ms 12 hours ago 283rd not-a-pokemon 0 74 15ms 18 hours ago 284th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 284th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 284th HumanoidCPU 0 75 112ms 22 hours ago 287th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 287th fuzzylojik-golf 🇺🇸 0 76 99ms 2 days ago 287th edsrzf 🇳🇿 0 76 131ms 2 days ago 287th emgordon154 0 76 115ms 29 hours ago 287th MeWhenI 🇻🇦 0 76 98ms 14 hours ago 292nd rucin93 🇵🇱 0 77 130ms 8 May 2025 292nd Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 292nd edsrzf 🇳🇿 0 77 7ms 14 hours ago 292nd GolfingSuccess 🇬🇷 0 77 8ms 12 hours ago 296th saito-ta 🇯🇵 0 78 4ms 10 May 2025 296th rhdqor213 0 78 4ms 10 May 2025 296th albanian-laundromat 0 78 93ms 4 days ago 296th fuzzylojik-golf 🇺🇸 0 78 8ms 19 hours ago 296th edsrzf 🇳🇿 0 78 425ms 13 hours ago 301st sean-niemann 🇺🇸 0 80 455ms 8 May 2025 302nd kumavale 0 81 156ms 26 Nov 2025 302nd Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 302nd albanian-laundromat 0 81 45ms 4 days ago 302nd fuzzylojik-golf 🇺🇸 0 81 9ms 20 hours ago 302nd stefangimmillaro 0 81 46ms 7 hours ago 307th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 307th emgordon154 0 82 159ms 14 Feb 2026 307th emgordon154 0 82 454ms 31 hours ago 307th edsrzf 🇳🇿 0 82 161ms 8 hours ago 311th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 311th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 311th fantaize 0 83 156ms 15 days ago 311th GolfingSuccess 🇬🇷 0 83 33ms 31 hours ago 311th MeWhenI 🇻🇦 0 83 229ms 22 hours ago 316th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 316th ovs-code 🇩🇪 0 84 12ms 10 May 2025 316th fuzzylojik-golf 🇺🇸 0 84 444ms 2 days ago 316th KasperKivimaeki 🇫🇮 0 84 12ms 16 hours ago 320th edsrzf 🇳🇿 0 85 42ms 8 May 2025 First Prev 241–320 of 419 Next Last