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?
Ordinal Numbers in Python 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 319th HelloYuiYui 560 116 12ms 31 Oct 2023 319th Andrey2001 560 116 20ms 31 Jan 2026 323rd amishtal 556 117 19ms 2 Dec 2019 323rd b4dpxl 556 117 12ms 4 Dec 2019 323rd celiendonze 🇨🇭 556 117 13ms 25 Apr 2023 323rd 1231234md5 🇨🇳 556 117 19ms 13 Dec 2023 323rd tejapvk 556 117 12ms 19 Jun 2025 328th notofyourinterest 551 118 13ms 13 Feb 2021 328th AtengChen 551 118 19ms 14 Aug 2024 330th handisb 546 119 12ms 11 Feb 2020 330th Ekan5h 546 119 17ms 29 Mar 2020 330th dgambit 546 119 12ms 7 Apr 2021 330th eshilo-draper 546 119 19ms 14 Nov 2022 330th Ythaenagor 546 119 19ms 5 Aug 2024 330th 123mjb 546 119 21ms 17 Nov 2025 330th artemetra 546 119 19ms 27 days ago 337th luftj 542 120 12ms 19 Jan 2021 337th dillon-duncando 542 120 19ms 3 Oct 2022 337th qpwoeirut 542 120 14ms 12 Aug 2025 340th dzshn 537 121 13ms 5 Sep 2021 340th goGuru 537 121 18ms 19 Dec 2022 340th mohammad-sayed-ahmad 537 121 12ms 21 Jul 2024 340th denisfouchard 537 121 12ms 22 Aug 2025 344th Pena86 533 122 20ms 28 Feb 2021 344th hymanimy 533 122 18ms 24 Aug 2021 344th Jaydosu 533 122 12ms 10 May 2022 344th CatsAreFluffy 533 122 20ms 18 Feb 2023 344th GitQuick 533 122 11ms 9 Mar 2024 349th msrawson 528 123 13ms 13 May 2020 349th Bodo171 528 123 19ms 24 Nov 2022 349th j3mak 528 123 12ms 19 Jan 2024 349th davidludwik2370 528 123 13ms 17 days ago 349th zgialor-lab 528 123 19ms 15 days ago 354th suchwise 524 124 13ms 29 Oct 2019 354th Omega65536 🇩🇪 524 124 12ms 10 Jan 2021 354th matricronia 524 124 19ms 6 May 2021 354th MaxElf999 524 124 12ms 24 May 2022 358th zuparnowa 520 125 13ms 12 Jul 2019 358th henrytranter 520 125 12ms 20 Sep 2019 358th brimstonetrader 520 125 13ms 8 Jan 2024 358th sciencejiho 520 125 20ms 18 Oct 2024 362nd michelebastione 🇮🇹 516 126 19ms 10 Feb 2020 362nd evanrittner 516 126 18ms 5 Jun 2021 362nd Bananapants22 516 126 13ms 4 Aug 2022 362nd eddvrs 516 126 20ms 20 Aug 2022 362nd ComputerKWasTaken 🇺🇸 516 126 12ms 21 Jan 2025 367th Florian-Mt 512 127 12ms 5 Oct 2023 367th zwxzwxzwx21 512 127 12ms 30 Jan 2024 367th NoneTheFewer 512 127 13ms 27 Dec 2025 370th Natanaelel 🇸🇪 508 128 20ms 8 Oct 2021 370th atazzam 🇺🇸 508 128 13ms 4 Apr 2022 370th Yareeeema 508 128 13ms 9 Jan 2023 373rd ethandhunt 504 129 19ms 15 Aug 2021 373rd WinterWolfSV 504 129 19ms 27 days ago 375th twocatsinatrenchcoat 500 130 12ms 29 Mar 2022 375th badboj40 500 130 14ms 26 Dec 2022 377th dahrens 496 131 12ms 11 Jul 2019 377th tobeannouncd 496 131 12ms 3 Jan 2024 377th Jd5221 496 131 19ms 14 Feb 2024 380th brochmann 🇸🇪 492 132 13ms 10 Feb 2022 380th alexjurkiewicz 🇦🇺 492 132 19ms 19 Jul 2022 380th DrPrettyman 492 132 19ms 6 Jun 2023 380th aalec 492 132 20ms 24 Apr 2024 384th MLPdiscord 489 133 21ms 10 Jan 2022 385th jameswmccarty 485 134 20ms 23 Feb 2025 386th wobblybits 481 135 16ms 20 Aug 2025 387th kyleclaassen 474 137 13ms 9 Feb 2022 387th nmgetahun 474 137 12ms 27 Jan 2023 389th boxjelly 471 138 13ms 10 Feb 2021 389th mathisfun271 471 138 12ms 26 Oct 2021 389th mdnestor 471 138 12ms 23 Dec 2022 389th Techdude01 471 138 21ms 19 Feb 2023 393rd Alex-Huggett 🇬🇧 468 139 19ms 22 Oct 2024 394th jackkav 464 140 19ms 24 Oct 2019 394th trist224 🇫🇷 464 140 21ms 18 Oct 2022 394th jhu04 464 140 19ms 26 Apr 2023 394th AbhilashaTandon 464 140 20ms 24 Sep 2023 394th ehulinsky 🇺🇸 464 140 13ms 29 Mar 2025 399th estomagordo 🇳🇱 461 141 13ms 7 Aug 2019 400th logvp 458 142 18ms 7 Jan 2024 First Prev 321–400 of 473 Next Last
