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?
Leyland 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 238th 0-4849 689 90 10ms 4 Nov 2022 238th namelessiw 689 90 10ms 9 Jul 2024 238th denkyuu1 689 90 10ms 15 Feb 2026 244th marcin7Cd 681 91 10ms 11 Dec 2020 244th amollberg 🇸🇪 681 91 10ms 15 Jan 2022 244th Bonjour27891 🇻🇳 681 91 10ms 4 Mar 2022 244th nstearns96 🇬🇧 681 91 19ms 29 Nov 2022 244th AlexanderFair 681 91 10ms 11 Jul 2023 244th adamnielson42 🇺🇸 681 91 11ms 22 Aug 2023 244th jhu04 681 91 11ms 18 Jan 2024 244th jacekwladzinski 681 91 9ms 4 Oct 2025 252nd mstang107 674 92 16ms 20 Dec 2023 252nd zwxzwxzwx21 674 92 17ms 30 Jan 2024 252nd jameswmccarty 674 92 10ms 11 Jul 2024 252nd PyryL 🇫🇮 674 92 9ms 22 Aug 2024 252nd JesseNoEyes 🇺🇸 674 92 10ms 17 Nov 2024 257th adoxography 667 93 10ms 8 Oct 2020 257th nullie 667 93 10ms 9 Jun 2022 257th julienlamoureux78 667 93 13ms 18 Aug 2022 257th CatsAreFluffy 667 93 11ms 21 Dec 2023 257th Mikey-Beep 🇬🇧 667 93 10ms 2 Jun 2024 257th Papushkado 667 93 12ms 18 Nov 2025 257th klixel 🇨🇦 667 93 10ms 9 Jan 2026 264th bbakersmith 660 94 9ms 18 Jul 2021 264th jfallon1997 660 94 11ms 9 Aug 2022 264th wobblybits 660 94 10ms 19 Aug 2025 267th LeeCamp 653 95 10ms 27 Dec 2021 267th 4ndyJ 🇬🇧 653 95 9ms 7 Feb 2023 267th 0-ag 653 95 11ms 25 Aug 2025 267th nemoyatpeace 653 95 10ms 14 Jan 2026 267th TheSecondComing123 653 95 11ms 5 Feb 2026 272nd Psirving 646 96 10ms 29 Jul 2020 272nd henrytranter 646 96 10ms 27 Aug 2020 272nd chrishm909 646 96 11ms 23 May 2021 272nd sleepyStick 646 96 16ms 3 Dec 2021 272nd tterem 646 96 11ms 8 Jun 2022 272nd sbyrne51 646 96 10ms 1 Oct 2022 278th asadullayev 639 97 15ms 3 Mar 2021 278th befoster 639 97 10ms 10 Apr 2021 278th myleopard 639 97 14ms 15 Oct 2021 278th Andrey135296 639 97 10ms 4 Apr 2022 278th Bodo171 639 97 16ms 25 Nov 2022 283rd ehulinsky 🇺🇸 633 98 10ms 11 Nov 2021 283rd Trunksistor 🇫🇷 633 98 10ms 24 May 2022 283rd MichaelMBradley 🇨🇦 633 98 10ms 19 Jun 2022 286th TimHuisman1703 626 99 10ms 7 Jan 2022 286th davecame 626 99 10ms 2 Aug 2023 288th EwanSkene 620 100 12ms 3 Sep 2020 288th boxjelly 620 100 11ms 14 Feb 2021 288th PhysicDev 🇫🇷 620 100 10ms 16 Mar 2022 288th wen1now 620 100 10ms 6 Nov 2023 288th Alban-Boissard 620 100 10ms 14 Jun 2025 288th TheZwierzLF 🇵🇱 620 100 10ms 17 Dec 2025 294th jameslindesay 614 101 42ms 25 Feb 2021 294th galloj 🇨🇿 614 101 11ms 21 Aug 2022 294th Acky-Acky 614 101 11ms 9 May 2024 297th findegil 608 102 10ms 26 Aug 2020 297th austinrwarner 608 102 11ms 25 Dec 2020 297th Omega65536 🇩🇪 608 102 16ms 6 Jan 2021 297th jhpaques 🇫🇷 608 102 14ms 29 Jul 2022 297th jamesthekee 608 102 10ms 25 Jan 2025 302nd atazzam 🇺🇸 602 103 14ms 2 Apr 2022 302nd vishwathg 602 103 10ms 21 Aug 2022 302nd willschremmer 602 103 10ms 28 Apr 2024 302nd wuzekai518 602 103 10ms 23 Jul 2024 302nd Mabeloid 🇳🇴 602 103 9ms 22 Sep 2024 302nd WillowWispy 602 103 10ms 17 Mar 2025 308th ydevor 🇮🇱 596 104 10ms 10 Mar 2021 309th mathwiz42 590 105 10ms 18 Aug 2020 309th PFischbeck 590 105 11ms 31 Oct 2020 309th estomagordo 🇳🇱 590 105 9ms 6 Dec 2021 309th 0dyse 590 105 14ms 12 Sep 2025 313th artieleach 585 106 14ms 7 Feb 2021 313th martinnorling 🇸🇪 585 106 10ms 31 Jan 2022 313th dylanjones92 585 106 10ms 26 Jan 2024 313th Europe2048 585 106 10ms 12 days ago 317th dostuffthatmatters 579 107 10ms 26 Jul 2020 317th guilhem-roy 🇫🇷 579 107 10ms 28 Feb 2022 317th celiendonze 🇨🇭 579 107 13ms 20 Apr 2023 317th Stockoh 🇫🇷 579 107 17ms 2 Oct 2024 First Prev 241–320 of 390 Next Last
