The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 81st kg583 🇺🇸 0 56 562ms 1 Dec 2024 81st GolfingSuccess 🇬🇷 0 56 9ms 14 Jan 2026 81st kg583 🇺🇸 0 56 9ms 14 Jan 2026 81st GolfingSuccess 🇬🇷 0 56 488ms 22 Jan 2026 81st Steffan153 🇫🇮 0 56 447ms 19 Feb 2026 81st edsrzf 🇳🇿 0 56 9ms 6 hours ago 81st helbling 🇨🇭 0 56 40ms 5 hours ago 81st CaedenHarper 🇨🇦 0 56 14ms 2 hours ago 89th edsrzf 🇳🇿 0 57 13ms 10 May 2025 89th pardouin 🇫🇷 0 57 572ms 14 Feb 2026 89th GolfingSuccess 🇬🇷 0 57 213ms 15 days ago 89th rucin93 🇵🇱 0 57 211ms 15 days ago 93rd sean-niemann 🇺🇸 0 58 163ms 15 Jan 2026 94th lifthrasiir 🇰🇷 0 59 572ms 11 Dec 2024 94th ovs-code 🇩🇪 0 59 413ms 23 Feb 2025 94th error256 0 59 68ms 13 Jan 2026 94th madex 🇩🇪 0 59 2,743ms 3 days ago 98th khvdm 0 60 144ms 13 Jan 2025 98th emgordon154 0 60 379ms 9 May 2025 98th albanian-laundromat 0 60 369ms 22 Feb 2026 98th sean-niemann 🇺🇸 0 60 458ms 2 days ago 98th Seek64 🇩🇪 0 60 125ms 9 hours ago 98th HumanoidCPU 0 60 562ms 2 hours ago 104th DialFrost 🇸🇬 0 61 25ms 24 Feb 2025 104th voytxt 🇨🇿 0 61 62ms 1 Jan 2026 104th albanian-laundromat 0 61 26ms 20 days ago 104th aksyristos 0 61 11ms 6 days ago 108th Andrey-Plotnikov 0 62 36ms 12 Jan 2025 108th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 108th pardouin 🇫🇷 0 62 192ms 14 Feb 2026 108th Steffan153 🇫🇮 0 62 200ms 21 Feb 2026 108th JOrE20 0 62 28ms 25 days ago 113th kg583 🇺🇸 0 63 904ms 1 Dec 2024 113th hallvabo 🇳🇴 0 63 150ms 30 Dec 2024 113th Shanethegamer 🇺🇸 0 63 198ms 7 May 2025 113th sean-niemann 🇺🇸 0 63 7ms 9 May 2025 113th rucin93 🇵🇱 0 63 7ms 10 May 2025 113th edsrzf 🇳🇿 0 63 6ms 10 May 2025 113th targrik 0 63 7ms 8 Oct 2025 113th GolfingSuccess 🇬🇷 0 63 7ms 12 Jan 2026 113th fuzzylojik-golf 🇺🇸 0 63 142ms 25 hours ago 122nd CornerMercury 🇬🇧 0 64 19ms 3 Dec 2024 122nd ndren 0 64 18ms 3 Dec 2024 122nd lifthrasiir 🇰🇷 0 64 182ms 11 Dec 2024 122nd emgordon154 0 64 19ms 9 May 2025 122nd error256 0 64 4,375ms 15 Jan 2026 122nd anter69 🇭🇺 0 64 19ms 4 Feb 2026 122nd albanian-laundromat 0 64 18ms 22 Feb 2026 122nd albanian-laundromat 0 64 547ms 23 Feb 2026 122nd HumanoidCPU 0 64 256ms 2 hours ago 131st Shanethegamer 🇺🇸 0 65 257ms 13 Dec 2024 131st GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 131st dokutan 0 65 359ms 14 Feb 2026 134th dokutan 0 66 19ms 18 Aug 2025 134th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 134th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 134th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 138th Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 138th Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 138th namelessiw 0 67 407ms 2 Nov 2025 138th error256 0 67 111ms 30 Jan 2026 138th CaedenHarper 🇨🇦 0 67 553ms 3 days ago 138th fuzzylojik-golf 🇺🇸 0 67 490ms 25 hours ago 144th Yax42 🇫🇷 0 68 12ms 9 hours ago 145th 4atj 0 69 1,159ms 21 May 2025 145th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 145th error256 0 69 410ms 2 days ago 148th btnlq 0 70 193ms 4 Dec 2024 148th kg583 🇺🇸 0 70 128ms 3 Oct 2025 148th error256 0 70 133ms 15 Jan 2026 148th error256 0 70 18ms 11 days ago 152nd GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 152nd GolfingSuccess 🇬🇷 0 71 25ms 12 Jan 2026 152nd GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 152nd ovs-code 🇩🇪 0 71 134ms 7 hours ago 152nd edsrzf 🇳🇿 0 71 18ms 2 mins ago 157th edsrzf 🇳🇿 0 72 546ms 9 May 2025 157th kg583 🇺🇸 0 72 18ms 2 Oct 2025 157th rucin93 🇵🇱 0 72 9ms 17 days ago 157th aksyristos 0 72 247ms 13 days ago First Prev 81–160 of 304 Next Last