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?
Christmas Trees in Rust 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 JayXon 🇺🇸 1,000 89 154ms 2 Aug 2022 1st kumavale 1,000 89 136ms 30 Aug 2025 1st acotis 1,000 89 135ms 21 Dec 2025 1st sean-niemann 🇺🇸 1,000 89 145ms 6 Jan 2026 5th lynn 989 90 161ms 9 Nov 2025 6th prplz 🇦🇺 967 92 171ms 14 Sep 2022 7th primo-ppcg 🇹🇭 957 93 138ms 9 Jan 2020 7th andersk 🇺🇸 957 93 145ms 18 Mar 2020 7th snobee 🇨🇦 957 93 124ms 12 Dec 2022 10th nullie 947 94 140ms 31 Dec 2024 11th WhoisDavid 937 95 141ms 30 Sep 2020 12th timvermeulen 927 96 151ms 6 Jan 2020 12th drabart 🇵🇱 927 96 151ms 15 Dec 2023 14th elgan65536 🇺🇸 908 98 148ms 27 Sep 2023 14th emgordon154 908 98 148ms 23 Feb 2025 16th ian-h-chamberlain 🇺🇸 890 100 139ms 29 Dec 2025 17th btjones0 873 102 131ms 29 Dec 2020 17th xDavidL 873 102 133ms 6 May 2021 17th Ignition 🇬🇧 873 102 144ms 12 Oct 2023 20th klixel 🇨🇦 840 106 146ms 4 Jun 2023 20th ovs-code 🇩🇪 840 106 148ms 28 Jun 2023 20th stefangimmillaro 840 106 160ms 20 Oct 2023 23rd Skepfyr 832 107 153ms 4 Jan 2020 23rd frozolotl 832 107 148ms 9 Jan 2020 23rd detrumi 🇳🇱 832 107 147ms 22 Oct 2020 26th verticallity 802 111 154ms 6 Apr 2022 27th vidanm 🇫🇷 788 113 156ms 5 Jun 2025 28th abel465 🇳🇿 781 114 158ms 7 May 2021 29th wellsie1116 774 115 152ms 14 Dec 2021 30th mousetail 🇳🇱 767 116 152ms 19 Jan 2024 31st nipzu 761 117 129ms 4 Jan 2020 32nd Eolu 748 119 153ms 20 Jan 2022 33rd isaacg1 742 120 163ms 4 Jan 2020 33rd Pena86 742 120 154ms 25 Dec 2021 33rd msbranicky 742 120 151ms 6 Oct 2023 33rd Aurel300 🇨🇭 742 120 152ms 30 Jun 2024 33rd dokutan 742 120 156ms 13 Jul 2024 33rd luuumine 🇫🇷 742 120 151ms 8 Dec 2025 39th JGDoerrer 730 122 155ms 18 Jan 2022 39th yamhab 🇨🇦 730 122 149ms 13 Sep 2023 41st matthewproskils 724 123 153ms 14 Dec 2020 42nd SpeedyNinja 712 125 158ms 19 Oct 2020 42nd jiaminglimjm 🇲🇾 712 125 160ms 6 Jan 2021 44th TheSmilingTurtle 706 126 177ms 5 Jun 2022 45th deltaphc 695 128 132ms 7 Jan 2020 46th d0x2f 690 129 155ms 5 Jan 2020 46th zeerooth 🇵🇱 690 129 157ms 2 Feb 2021 46th WatMan77 690 129 155ms 16 Aug 2023 49th hotmanga 669 133 173ms 18 Oct 2023 50th xbxbxb007 659 135 154ms 10 Jan 2024 51st Ernest1338 622 143 174ms 20 Feb 2022 52nd scottpenn 601 148 139ms 4 Jan 2020 53rd SolidTux 589 151 143ms 6 Jan 2020 54th Domicnt 582 153 132ms 16 Jun 2020 55th antonymerle 326 273 150ms 26 May 2020 56th KatieLG 🇬🇧 280 318 211ms 30 Nov 2025 57th fantaize 265 336 161ms 16 days ago 58th MeWhenI 🇻🇦 158 565 113ms 29 Jul 2021 58th retrohun 158 565 111ms 27 Dec 2022 58th Shanethegamer 🇺🇸 158 565 114ms 13 Sep 2023 58th HumanoidCPU 158 565 110ms 13 May 2024 58th CaedenHarper 🇨🇦 158 565 114ms 16 Aug 2025 63rd Joe-V2 151 590 110ms 19 Apr 2022 64th mokymok 🇺🇸 144 619 113ms 16 Nov 2021 65th KatieLG-Transpiler 🇬🇧 143 622 112ms 24 Jun 2022 1–65 of 65
