The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 161st Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 161st sean-niemann 🇺🇸 0 57 176ms 25 May 2025 161st edsrzf 🇳🇿 0 57 167ms 25 May 2025 161st GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 161st Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 161st albanian-laundromat 0 57 296ms 30 hours ago 167th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 168th GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 168th IanUtley 0 59 18ms 8 May 2025 168th GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 171st pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 171st fuzzylojik-golf 🇺🇸 0 60 16ms 18 hours ago 173rd GolfingSuccess 🇬🇷 0 61 2,468ms 8 May 2025 173rd madex 🇩🇪 0 61 2,598ms 3 days ago 175th AlephSquirrel 0 62 15ms 25 Nov 2024 175th btnlq 0 62 15ms 4 Dec 2024 175th Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 175th Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 175th ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 175th bricknellj 0 62 16ms 30 Jan 2025 175th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 175th error256 0 62 16ms 12 Apr 2025 175th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 175th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 175th 4atj 0 62 16ms 9 May 2025 175th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 175th hiichbindermax 0 62 18ms 17 Aug 2025 175th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 175th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 175th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 175th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 175th GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 175th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 175th lukegustafson 🇺🇸 0 62 36ms 15 days ago 175th aksyristos 0 62 14ms 12 days ago 175th madex 🇩🇪 0 62 15ms 4 days ago 175th CaedenHarper 🇨🇦 0 62 16ms 3 days ago 175th KatieLG 🇬🇧 0 62 17ms 21 hours ago 175th KatieLG 🇬🇧 0 62 416ms 21 hours ago 175th scpchicken 🇵🇼 0 62 15ms 20 hours ago 175th StefanHabel 🇨🇦 0 62 15ms 14 hours ago 175th blaztoma 🇱🇹 0 62 15ms 12 hours ago 175th Emutis 🇱🇹 0 62 16ms 10 hours ago 175th Andrey2001 0 62 17ms 4 hours ago 175th anter69 🇭🇺 0 62 15ms 15 mins ago 206th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 206th albanian-laundromat 0 63 44ms 14 Jan 2026 206th tomh1012 0 63 15ms 8 hours ago 209th jameswmccarty 0 64 15ms 29 Mar 2025 209th dokutan 0 64 63ms 8 Feb 2026 209th albanian-laundromat 0 64 188ms 2 days ago 212th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 212th rucin93 🇵🇱 0 66 6ms 8 May 2025 212th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 212th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 212th namelessiw 0 66 434ms 2 Nov 2025 212th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 212th albanian-laundromat 0 66 1,391ms 2 days ago 212th Yax42 🇫🇷 0 66 484ms 30 hours ago 212th fuzzylojik-golf 🇺🇸 0 66 456ms 19 hours ago 221st GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 221st tomh1012 0 67 429ms 8 hours ago 223rd Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 223rd sean-niemann 🇺🇸 0 68 131ms 8 May 2025 223rd edsrzf 🇳🇿 0 68 113ms 25 May 2025 223rd GolfingSuccess 🇬🇷 0 68 110ms 44 hours ago 227th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 227th CaedenHarper 🇨🇦 0 69 486ms 46 hours ago 229th JOrE20 0 70 41ms 13 Feb 2026 230th kg583 🇺🇸 0 71 27ms 1 Dec 2024 230th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 230th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 230th edsrzf 🇳🇿 0 71 14ms 8 May 2025 230th AlephSquirrel 0 71 13ms 9 May 2025 235th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 235th edsrzf 🇳🇿 0 72 7ms 74 mins ago 237th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 238th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 238th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 240th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 First Prev 161–240 of 337 Next Last