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 317th tomh1012 579 107 10ms 24 Feb 2026 322nd Ted-Barrett 🇦🇺 574 108 10ms 30 Sep 2021 322nd vodker1 574 108 10ms 7 Mar 2022 324th dymowski 569 109 10ms 17 Aug 2020 324th Florian-Mt 569 109 9ms 29 Sep 2023 326th CRHillman 564 110 11ms 14 Sep 2020 326th the-soph-ia 564 110 10ms 7 Mar 2021 328th eiburns 559 111 10ms 4 Jan 2022 328th Vaekor 559 111 10ms 9 Jul 2023 330th SniperSmiley 🇺🇸 554 112 14ms 24 Jun 2022 330th 5quiwyrm 554 112 10ms 9 Dec 2024 330th TJK-S 554 112 10ms 1 Dec 2025 333rd OppositeShark 549 113 11ms 20 Jul 2022 333rd codewrite 🇬🇧 549 113 10ms 13 Jul 2025 335th vprab 544 114 10ms 18 Dec 2020 335th cthierfelder 🇲🇨 544 114 11ms 6 Sep 2025 337th SlicesOfficial 539 115 12ms 16 Oct 2021 337th Jaydosu 539 115 10ms 26 Jun 2024 339th wrhm 534 116 10ms 13 Dec 2020 339th orifu 534 116 12ms 25 Jun 2021 339th hymanimy 534 116 9ms 22 Jul 2021 342nd petar-donchev 530 117 11ms 5 Dec 2021 342nd Jaca1878 530 117 12ms 9 May 2022 344th pmooreh 525 118 10ms 19 Aug 2022 345th WilliamBate 521 119 10ms 18 Aug 2020 345th shraiwi 521 119 10ms 7 Mar 2021 345th DynamiteBear 521 119 10ms 25 Nov 2022 348th eggplants 🇯🇵 517 120 11ms 26 Nov 2020 348th Ripick 517 120 10ms 22 May 2025 350th nooberitess 512 121 10ms 8 Apr 2025 351st 1231234md5 🇨🇳 508 122 10ms 10 Dec 2023 351st qwjhvbxi 508 122 11ms 7 Feb 2024 353rd twocatsinatrenchcoat 504 123 9ms 5 May 2022 354th vonKrafft 500 124 10ms 18 Sep 2020 355th drewhead118 496 125 10ms 30 May 2022 355th ComputerKWasTaken 🇺🇸 496 125 10ms 5 Sep 2024 357th Zhenyu-Bo 488 127 9ms 31 Jul 2025 358th mhenion8293 🇺🇸 481 129 18ms 19 Jan 2022 359th brimstonetrader 477 130 10ms 22 Jan 2024 360th dillon-duncando 473 131 10ms 3 Oct 2022 361st mbittner20 470 132 9ms 11 Jul 2024 362nd DarkTemplar5 463 134 10ms 11 Oct 2020 363rd xkacer 🇨🇿 453 137 16ms 30 Jan 2021 364th SURAJMITTAL 428 145 9ms 19 Dec 2024 365th Bananapants22 403 154 10ms 30 Aug 2022 365th kevinnaviapaiva 403 154 10ms 26 Feb 2025 367th jstechman 395 157 12ms 25 Feb 2024 368th felixcroc 383 162 37ms 16 Apr 2022 369th muser-logiccpu 🇺🇦 356 174 10ms 25 Aug 2025 370th arinhyther 333 186 11ms 30 Dec 2022 371st NoneTheFewer 313 198 10ms 27 Dec 2025 372nd glf818 279 222 9ms 22 Jul 2021 373rd szmeku 251 247 10ms 5 Feb 2021 374th fl3ur1nestimable 225 276 10ms 3 Apr 2022 375th WilliamRhind123 207 300 12ms 9 Dec 2025 376th nickweissert-star 190 327 10ms 12 days ago 377th alfonsoalves 154 402 240ms 20 Jul 2024 378th HumanoidCPU 131 474 10ms 7 May 2024 379th NanduBC 69 898 10ms 18 Mar 2021 379th enbyte 69 898 9ms 10 Jun 2021 379th theunofficialcoder 69 898 10ms 3 Aug 2021 379th bwat2 69 898 10ms 6 Nov 2021 379th karhuthebear 69 898 9ms 10 May 2022 379th andre-de-lorde 69 898 9ms 7 Sep 2022 379th retrohun 69 898 10ms 28 Dec 2022 386th mothcolada 🇺🇸 62 1,000 10ms 27 Jan 2021 386th KatieLG-Transpiler 🇬🇧 62 1,000 10ms 23 Jun 2022 386th zt14427 62 1,000 11ms 18 Nov 2023 389th ro011110ot 61 1,017 10ms 25 Aug 2025 390th AidanWalter 56 1,110 10ms 3 Jan 2025 First Prev 321–390 of 390
