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 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 156th fuzzylojik-golf 🇺🇸 0 67 490ms 2 days ago 162nd Yax42 🇫🇷 0 68 16ms 33 hours ago 163rd 4atj 0 69 1,159ms 21 May 2025 163rd GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 163rd error256 0 69 410ms 3 days ago 163rd edsrzf 🇳🇿 0 69 394ms 18 hours ago 167th btnlq 0 70 193ms 4 Dec 2024 167th kg583 🇺🇸 0 70 128ms 3 Oct 2025 167th error256 0 70 133ms 15 Jan 2026 167th error256 0 70 18ms 12 days ago 171st GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 171st GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 171st GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 171st ovs-code 🇩🇪 0 71 134ms 31 hours ago 171st edsrzf 🇳🇿 0 71 18ms 24 hours ago 171st kg583 🇺🇸 0 71 18ms 22 hours ago 171st rhdqor213 0 71 4ms 17 hours ago 178th rucin93 🇵🇱 0 72 9ms 18 days ago 178th aksyristos 0 72 247ms 14 days ago 178th blaztoma 🇱🇹 0 72 123ms 35 hours ago 178th Emutis 🇱🇹 0 72 121ms 34 hours ago 178th KasperKivimaeki 🇫🇮 0 72 4ms 29 hours ago 178th edsrzf 🇳🇿 0 72 9ms 16 hours ago 184th IISResetMe 0 73 310ms 10 Jan 2026 185th saito-ta 🇯🇵 0 74 3ms 11 May 2025 185th error256 0 74 3ms 12 Jan 2026 185th dokutan 0 74 65ms 8 Feb 2026 185th lukegustafson 🇺🇸 0 74 189ms 16 days ago 185th albanian-laundromat 0 74 9ms 8 days ago 190th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 190th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 190th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 190th albanian-laundromat 0 75 108ms 5 Jan 2026 190th albanian-laundromat 0 75 455ms 6 Jan 2026 190th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 190th albanian-laundromat 0 75 238ms 23 days ago 190th madex 🇩🇪 0 75 18ms 7 days ago 190th CaedenHarper 🇨🇦 0 75 149ms 4 days ago 190th Yax42 🇫🇷 0 75 4ms 31 hours ago 190th edsrzf 🇳🇿 0 75 17ms 16 hours ago 190th zgialor-lab 0 75 25ms 8 hours ago 202nd Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 202nd ovs-code 🇩🇪 0 76 3ms 10 May 2025 202nd AlephSquirrel 0 76 43ms 3 Dec 2025 202nd AlephSquirrel 0 76 445ms 3 Dec 2025 202nd albanian-laundromat 0 76 18ms 23 days ago 202nd albanian-laundromat 0 76 188ms 16 days ago 202nd MeWhenI 🇻🇦 0 76 586ms 9 days ago 202nd MeWhenI 🇻🇦 0 76 184ms 2 hours ago 210th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 210th DialFrost 🇸🇬 0 77 19ms 8 May 2025 210th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 210th addmai 0 77 20ms 24 Jul 2025 210th hiichbindermax 0 77 19ms 17 Aug 2025 210th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 210th davecame 0 77 135ms 25 Sep 2025 210th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 210th jtaxen 0 77 19ms 16 Oct 2025 210th albanian-laundromat 0 77 412ms 6 Dec 2025 210th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 210th KasperKivimaeki 🇫🇮 0 77 564ms 10 days ago 210th StefanHabel 🇨🇦 0 77 1,207ms 44 hours ago 210th ahmetdemirag 🇨🇾 0 77 18ms 38 hours ago 210th tomh1012 0 77 17ms 37 hours ago 210th qpwoeirut 0 77 20ms 22 hours ago 210th btjones0 0 77 19ms 19 hours ago 210th ComradeSquirrel 0 77 18ms 17 hours ago 210th bzijlema 🇳🇱 0 77 18ms 16 hours ago 229th jameswmccarty 0 78 20ms 29 Mar 2025 229th DialFrost 🇸🇬 0 78 940ms 10 May 2025 229th DialFrost 🇸🇬 0 78 3ms 10 May 2025 229th solisolu 0 78 20ms 10 Nov 2025 233rd BREMAUCY 🇫🇷 0 79 18ms 40 hours ago 233rd Andrey2001 0 79 18ms 34 hours ago 233rd edsrzf 🇳🇿 0 79 30ms 16 hours ago 233rd madex 🇩🇪 0 79 416ms 3 hours ago 237th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 237th error256 0 80 466ms 16 Jan 2026 237th stefangimmillaro 0 80 19ms 21 hours ago 237th albanian-laundromat 0 80 28ms 20 hours ago First Prev 161–240 of 338 Next Last