The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 24 hours. Why not try and solve them ahead of time?
Tutorial in all languages in bytes. 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 Bytes Time Submitted 842nd Bulmenisaurus 0 65 13ms 1 Jan 2025 842nd m-tkach 🇺🇦 0 65 157ms 3 Jan 2025 842nd b-illy 🇬🇧 0 65 11ms 4 Jan 2025 842nd emgordon154 0 65 7ms 11 Jan 2025 842nd CLOStrophobic 🇮🇹 0 65 13ms 22 Jan 2025 842nd prplz 🇦🇺 0 65 11ms 23 Jan 2025 842nd kg583 🇺🇸 0 65 6ms 23 Jan 2025 842nd CLOStrophobic 🇮🇹 0 65 7ms 23 Jan 2025 842nd sean-niemann 🇺🇸 0 65 11ms 23 Jan 2025 842nd mathisfun271 0 65 11ms 25 Jan 2025 842nd aliberro39109 0 65 11ms 25 Jan 2025 842nd Natanaelel 🇸🇪 0 65 11ms 26 Jan 2025 842nd Shanethegamer 🇺🇸 0 65 11ms 30 Jan 2025 842nd firegene 🇮🇪 0 65 10ms 30 Jan 2025 842nd Lydxn 🇨🇦 0 65 10ms 31 Jan 2025 842nd commandz0 🇺🇸 0 65 12ms 2 Feb 2025 842nd GolfingSuccess 🇬🇷 0 65 6ms 3 Feb 2025 842nd bricknellj 0 65 11ms 5 Feb 2025 842nd xyangst 0 65 13ms 14 Feb 2025 842nd emgordon154 0 65 48ms 17 Feb 2025 842nd GolfingSuccess 🇬🇷 0 65 166ms 6 Mar 2025 842nd Jacob385 0 65 2ms 19 Mar 2025 842nd 4atj 0 65 12ms 10 Apr 2025 842nd orthoplex 🇨🇽 0 65 11ms 16 Apr 2025 842nd MeWhenI 🇻🇦 0 65 12ms 17 Apr 2025 842nd Mukundan314 0 65 12ms 17 Apr 2025 842nd MeWhenI 🇻🇦 0 65 6ms 17 Apr 2025 842nd DialFrost 🇸🇬 0 65 7ms 17 Apr 2025 842nd DialFrost 🇸🇬 0 65 12ms 17 Apr 2025 842nd error256 0 65 12ms 17 Apr 2025 842nd rucin93 🇵🇱 0 65 10ms 17 Apr 2025 842nd edsrzf 🇳🇿 0 65 162ms 17 Apr 2025 842nd edsrzf 🇳🇿 0 65 3ms 18 Apr 2025 842nd HumanoidCPU 0 65 12ms 18 Apr 2025 842nd HumanoidCPU 0 65 8ms 18 Apr 2025 842nd HumanoidCPU 0 65 166ms 18 Apr 2025 842nd DialFrost 🇸🇬 0 65 151ms 18 Apr 2025 842nd BlankSpruce 0 65 12ms 18 Apr 2025 842nd Shanethegamer 🇺🇸 0 65 147ms 18 Apr 2025 842nd CaedenHarper 🇨🇦 0 65 6ms 18 Apr 2025 842nd CaedenHarper 🇨🇦 0 65 167ms 18 Apr 2025 842nd FEZfan 🇦🇺 0 65 13ms 19 Apr 2025 842nd undefinedRyan 0 65 11ms 19 Apr 2025 842nd DialFrost 🇸🇬 0 65 3ms 20 Apr 2025 842nd plcc0 0 65 10ms 21 Apr 2025 842nd dokutan 0 65 7ms 28 Apr 2025 842nd RYSF13 🇨🇳 0 65 2ms 13 May 2025 842nd Shanethegamer 🇺🇸 0 65 3ms 13 May 2025 842nd robin-scragg 0 65 12ms 19 May 2025 842nd ryyyn 🇺🇸 0 65 11ms 21 May 2025 842nd Kyogre-Primal 🇺🇦 0 65 11ms 21 May 2025 842nd albanian-laundromat 0 65 12ms 4 Jun 2025 842nd fuzzylojik-golf 🇺🇸 0 65 11ms 5 Jun 2025 842nd codingisgreatbutiamnot 0 65 12ms 7 Jun 2025 842nd SoliGhost 0 65 11ms 8 Jun 2025 842nd cros107 🇦🇺 0 65 12ms 14 Jun 2025 842nd long279595192 0 65 13ms 20 Jun 2025 842nd jiji7879 0 65 12ms 20 Jun 2025 842nd alemelis 0 65 10ms 20 Jun 2025 842nd elana-teal 0 65 11ms 20 Jun 2025 842nd zijinoier 0 65 12ms 25 Jun 2025 842nd dirckvdende 0 65 11ms 30 Jun 2025 842nd BREMAUCY 🇫🇷 0 65 12ms 1 Jul 2025 842nd Quentin-AC 0 65 10ms 2 Jul 2025 842nd qpwoeirut 0 65 11ms 3 Jul 2025 842nd jak-ch-ll 0 65 12ms 6 Jul 2025 842nd anter69 🇭🇺 0 65 12ms 9 Jul 2025 842nd Flekay 🇩🇪 0 65 11ms 10 Jul 2025 842nd klixel 🇨🇦 0 65 10ms 11 Jul 2025 842nd KasperKivimaeki 🇫🇮 0 65 10ms 15 Jul 2025 842nd Nyandereian 0 65 10ms 15 Jul 2025 842nd itu-itis21-akkoyuno21 0 65 11ms 15 Jul 2025 842nd GrayJoKing 🇦🇺 0 65 11ms 18 Jul 2025 842nd AbrahamJLR 🇻🇪 0 65 13ms 18 Jul 2025 842nd RaBa21 🇭🇺 0 65 11ms 19 Jul 2025 842nd jeetsh4h 0 65 10ms 19 Jul 2025 842nd LostSyntax21 🇬🇧 0 65 12ms 19 Jul 2025 842nd wuduculfre 0 65 12ms 21 Jul 2025 842nd yjgnaw 0 65 10ms 24 Jul 2025 842nd oween12 0 65 11ms 6 Aug 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