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 159th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 159th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 159th edsrzf 🇳🇿 0 66 11ms 34 hours ago 159th Steffan153 🇫🇮 0 66 10ms 10 hours ago 165th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 165th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 165th namelessiw 0 67 407ms 2 Nov 2025 165th error256 0 67 111ms 30 Jan 2026 165th CaedenHarper 🇨🇦 0 67 553ms 4 days ago 165th fuzzylojik-golf 🇺🇸 0 67 490ms 2 days ago 171st Yax42 🇫🇷 0 68 16ms 47 hours ago 172nd 4atj 0 69 1,159ms 21 May 2025 172nd GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 172nd error256 0 69 410ms 3 days ago 172nd edsrzf 🇳🇿 0 69 394ms 33 hours ago 176th btnlq 0 70 193ms 4 Dec 2024 176th kg583 🇺🇸 0 70 128ms 3 Oct 2025 176th error256 0 70 133ms 15 Jan 2026 176th error256 0 70 18ms 13 days ago 176th DialFrost 🇸🇬 0 70 116ms 22 mins ago 181st GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 181st GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 181st GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 181st ovs-code 🇩🇪 0 71 134ms 46 hours ago 181st edsrzf 🇳🇿 0 71 18ms 38 hours ago 181st kg583 🇺🇸 0 71 18ms 37 hours ago 181st rhdqor213 0 71 4ms 32 hours ago 188th rucin93 🇵🇱 0 72 9ms 19 days ago 188th aksyristos 0 72 247ms 14 days ago 188th blaztoma 🇱🇹 0 72 123ms 2 days ago 188th Emutis 🇱🇹 0 72 121ms 2 days ago 188th KasperKivimaeki 🇫🇮 0 72 4ms 44 hours ago 188th edsrzf 🇳🇿 0 72 9ms 31 hours ago 188th zacjl 0 72 131ms 12 hours ago 188th Steffan153 🇫🇮 0 72 4ms 82 mins ago 196th IISResetMe 0 73 310ms 10 Jan 2026 197th saito-ta 🇯🇵 0 74 3ms 11 May 2025 197th error256 0 74 3ms 12 Jan 2026 197th dokutan 0 74 65ms 8 Feb 2026 197th lukegustafson 🇺🇸 0 74 189ms 17 days ago 197th albanian-laundromat 0 74 9ms 9 days ago 202nd Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 202nd Natanaelel 🇸🇪 0 75 19ms 11 May 2025 202nd commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 202nd albanian-laundromat 0 75 108ms 5 Jan 2026 202nd albanian-laundromat 0 75 455ms 6 Jan 2026 202nd GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 202nd albanian-laundromat 0 75 238ms 23 days ago 202nd madex 🇩🇪 0 75 18ms 7 days ago 202nd CaedenHarper 🇨🇦 0 75 149ms 4 days ago 202nd Yax42 🇫🇷 0 75 4ms 46 hours ago 202nd edsrzf 🇳🇿 0 75 17ms 31 hours ago 202nd zgialor-lab 0 75 25ms 23 hours ago 214th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 214th ovs-code 🇩🇪 0 76 3ms 10 May 2025 214th AlephSquirrel 0 76 43ms 3 Dec 2025 214th AlephSquirrel 0 76 445ms 3 Dec 2025 214th albanian-laundromat 0 76 18ms 23 days ago 214th albanian-laundromat 0 76 188ms 17 days ago 214th MeWhenI 🇻🇦 0 76 586ms 10 days ago 214th MeWhenI 🇻🇦 0 76 184ms 17 hours ago 214th duckyluuk 🇳🇱 0 76 128ms 51 mins ago 223rd Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 223rd DialFrost 🇸🇬 0 77 18ms 8 May 2025 223rd Natanaelel 🇸🇪 0 77 3ms 11 May 2025 223rd addmai 0 77 20ms 24 Jul 2025 223rd hiichbindermax 0 77 19ms 17 Aug 2025 223rd 5cw 🇺🇸 0 77 18ms 22 Aug 2025 223rd davecame 0 77 135ms 25 Sep 2025 223rd SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 223rd jtaxen 0 77 19ms 16 Oct 2025 223rd albanian-laundromat 0 77 412ms 6 Dec 2025 223rd Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 223rd KasperKivimaeki 🇫🇮 0 77 564ms 10 days ago 223rd StefanHabel 🇨🇦 0 77 1,217ms 2 days ago 223rd ahmetdemirag 🇨🇾 0 77 18ms 2 days ago 223rd tomh1012 0 77 17ms 2 days ago 223rd qpwoeirut 0 77 20ms 36 hours ago 223rd btjones0 0 77 19ms 33 hours ago 223rd ComradeSquirrel 0 77 18ms 32 hours ago First Prev 161–240 of 360 Next Last