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 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 80th GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 80th kg583 🇺🇸 0 56 9ms 14 Jan 2026 80th GolfingSuccess 🇬🇷 0 56 488ms 22 Jan 2026 80th Steffan153 🇫🇮 0 56 447ms 19 Feb 2026 80th edsrzf 🇳🇿 0 56 9ms 2 hours ago 80th helbling 🇨🇭 0 56 40ms 2 hours ago 87th edsrzf 🇳🇿 0 57 13ms 10 May 2025 87th pardouin 🇫🇷 0 57 572ms 14 Feb 2026 87th GolfingSuccess 🇬🇷 0 57 213ms 15 days ago 87th rucin93 🇵🇱 0 57 211ms 15 days ago 91st sean-niemann 🇺🇸 0 58 163ms 15 Jan 2026 92nd lifthrasiir 🇰🇷 0 59 572ms 11 Dec 2024 92nd ovs-code 🇩🇪 0 59 413ms 23 Feb 2025 92nd error256 0 59 68ms 13 Jan 2026 92nd madex 🇩🇪 0 59 2,743ms 3 days ago 96th khvdm 0 60 144ms 13 Jan 2025 96th emgordon154 0 60 379ms 9 May 2025 96th albanian-laundromat 0 60 369ms 22 Feb 2026 96th sean-niemann 🇺🇸 0 60 458ms 2 days ago 96th Seek64 🇩🇪 0 60 125ms 6 hours ago 101st DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 101st voytxt 🇨🇿 0 61 62ms 1 Jan 2026 101st albanian-laundromat 0 61 26ms 20 days ago 101st aksyristos 0 61 11ms 6 days ago 105th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 105th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 105th pardouin 🇫🇷 0 62 192ms 14 Feb 2026 105th Steffan153 🇫🇮 0 62 200ms 21 Feb 2026 105th JOrE20 0 62 28ms 25 days ago 110th kg583 🇺🇸 0 63 904ms 1 Dec 2024 110th hallvabo 🇳🇴 0 63 150ms 30 Dec 2024 110th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 110th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 110th rucin93 🇵🇱 0 63 7ms 10 May 2025 110th edsrzf 🇳🇿 0 63 6ms 10 May 2025 110th targrik 0 63 7ms 8 Oct 2025 110th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 110th fuzzylojik-golf 🇺🇸 0 63 142ms 22 hours ago 119th CornerMercury 🇬🇧 0 64 19ms 3 Dec 2024 119th ndren 0 64 18ms 3 Dec 2024 119th lifthrasiir 🇰🇷 0 64 182ms 11 Dec 2024 119th emgordon154 0 64 19ms 9 May 2025 119th error256 0 64 4,375ms 15 Jan 2026 119th anter69 🇭🇺 0 64 19ms 4 Feb 2026 119th albanian-laundromat 0 64 18ms 22 Feb 2026 119th albanian-laundromat 0 64 547ms 23 Feb 2026 127th Shanethegamer 🇺🇸 0 65 257ms 13 Dec 2024 127th GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 127th dokutan 0 65 359ms 14 Feb 2026 130th dokutan 0 66 19ms 18 Aug 2025 130th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 130th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 130th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 134th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 134th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 134th namelessiw 0 67 407ms 2 Nov 2025 134th error256 0 67 111ms 30 Jan 2026 134th CaedenHarper 🇨🇦 0 67 553ms 3 days ago 134th fuzzylojik-golf 🇺🇸 0 67 490ms 22 hours ago 140th Yax42 🇫🇷 0 68 12ms 5 hours ago 141st 4atj 0 69 1,159ms 21 May 2025 141st GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 141st error256 0 69 410ms 2 days ago 144th btnlq 0 70 193ms 4 Dec 2024 144th kg583 🇺🇸 0 70 128ms 3 Oct 2025 144th error256 0 70 133ms 15 Jan 2026 144th error256 0 70 18ms 11 days ago 148th GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 148th GolfingSuccess 🇬🇷 0 71 25ms 12 Jan 2026 148th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 148th ovs-code 🇩🇪 0 71 134ms 3 hours ago 152nd edsrzf 🇳🇿 0 72 546ms 9 May 2025 152nd kg583 🇺🇸 0 72 18ms 2 Oct 2025 152nd rucin93 🇵🇱 0 72 9ms 17 days ago 152nd aksyristos 0 72 247ms 12 days ago 152nd blaztoma 🇱🇹 0 72 123ms 8 hours ago 152nd Emutis 🇱🇹 0 72 121ms 7 hours ago 152nd KasperKivimaeki 🇫🇮 0 72 3ms 2 hours ago 159th IISResetMe 0 73 310ms 10 Jan 2026 160th rhdqor213 0 74 3ms 11 May 2025 First Prev 81–160 of 296 Next Last