The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Evil Numbers in Scheme 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 1st edsrzf 🇳🇿 1,000 57 40ms 30 Dec 2024 1st DialFrost 🇸🇬 1,000 57 42ms 13 Feb 2025 1st zacjl 1,000 57 39ms 13 Feb 2025 1st kg583 🇺🇸 1,000 57 37ms 13 Feb 2025 1st pardouin 🇫🇷 1,000 57 39ms 25 Apr 2025 6th Steffan153 🇫🇮 983 58 39ms 17 Feb 2026 7th MeWhenI 🇻🇦 919 62 38ms 13 Feb 2025 8th error256 851 67 41ms 13 Feb 2025 9th codereport 🇨🇦 781 73 42ms 18 Apr 2025 9th ian-h-chamberlain 🇺🇸 781 73 40ms 9 Oct 2025 11th AlephSquirrel 770 74 41ms 21 Mar 2025 12th msbranicky 740 77 43ms 5 Sep 2024 12th Andriamanitra 🇫🇮 740 77 41ms 18 Jun 2025 12th tomh1012 740 77 40ms 4 Feb 2026 15th Shanethegamer 🇺🇸 722 79 42ms 22 Aug 2024 15th KatieLG 🇬🇧 722 79 41ms 22 Aug 2024 15th dokutan 722 79 40ms 24 Aug 2024 15th HumanoidCPU 722 79 37ms 25 Aug 2024 15th Jacob385 722 79 42ms 5 Sep 2024 15th voytxt 🇨🇿 722 79 41ms 5 Sep 2024 15th Mabeloid 🇳🇴 722 79 40ms 17 Sep 2024 15th emgordon154 722 79 41ms 22 Nov 2024 15th neel11235813 722 79 40ms 9 Dec 2024 15th JunkIce 722 79 41ms 19 Jan 2025 15th olleicua 🇺🇸 722 79 39ms 23 Jan 2025 15th acotis 722 79 41ms 6 Feb 2025 15th GolfingSuccess 🇬🇷 722 79 41ms 14 Mar 2025 15th plcc0 722 79 40ms 30 Mar 2025 15th Schmitt-Very-Cool 722 79 40ms 28 May 2025 15th albanian-laundromat 722 79 39ms 12 Jul 2025 15th CaedenHarper 🇨🇦 722 79 40ms 16 Aug 2025 15th duckyluuk 🇳🇱 722 79 40ms 27 Aug 2025 15th gigaprofisi 🇺🇸 722 79 40ms 5 Nov 2025 15th kurkale6ka 722 79 37ms 12 Dec 2025 35th scpchicken 🇵🇼 704 81 39ms 8 Sep 2024 36th commandz0 🇺🇸 655 87 40ms 1 Mar 2025 36th Natanaelel 🇸🇪 655 87 38ms 23 May 2025 36th snoozingnewt 🇨🇦 655 87 42ms 14 Sep 2025 39th fuzzylojik-golf 🇺🇸 640 89 37ms 19 hours ago 40th wh3n3v3r 🇨🇿 633 90 41ms 15 Nov 2024 41st adamnielson42 🇺🇸 620 92 41ms 3 Dec 2024 41st Yewzir 🇧🇪 620 92 46ms 30 Dec 2024 43rd madeforlosers 582 98 38ms 13 Sep 2024 44th Andrey2001 548 104 39ms 2 Feb 2026 45th zt14427 543 105 40ms 3 Feb 2025 46th CornerMercury 🇬🇧 518 110 40ms 11 Feb 2026 47th retrohun 514 111 39ms 27 Aug 2024 47th 5quiwyrm 514 111 39ms 9 Dec 2024 49th anter69 🇭🇺 504 113 39ms 18 Sep 2024 50th Zach1031 483 118 42ms 18 Nov 2025 51st madex 🇩🇪 475 120 42ms 12 days ago 52nd heanyang1 471 121 41ms 21 May 2025 52nd jacekwladzinski 471 121 41ms 8 Oct 2025 54th InigoK 🇺🇸 467 122 40ms 20 Sep 2025 55th kevinnaviapaiva 456 125 38ms 23 Feb 2026 56th Babafaba 452 126 41ms 24 Oct 2025 57th Maximizer02 435 131 38ms 23 Oct 2024 57th blaztoma 🇱🇹 435 131 41ms 5 Sep 2025 59th kmathis22 432 132 42ms 29 Sep 2025 60th klixel 🇨🇦 429 133 38ms 28 Mar 2025 61st BREMAUCY 🇫🇷 399 143 42ms 4 Sep 2024 62nd aksyristos 169 338 42ms 25 Sep 2024 63rd AidanWalter 164 348 40ms 2 Jan 2025 64th JOrE20 145 394 40ms 6 Nov 2025 65th RaBa21 🇭🇺 136 419 40ms 10 Jul 2025 66th SB-945 110 519 42ms 1 Oct 2024 66th ndren 110 519 37ms 13 Feb 2026 68th yhm138 18 3,098 45ms 16 Feb 2025 1–68 of 68
