The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
12 Days of Christmas 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 79th jeff-at-tamer-dot-codes 🇺🇸 739 257 11ms 31 May 2023 79th jatloe 739 257 10ms 23 Oct 2024 79th KatieLG 🇬🇧 739 257 10ms 17 Jan 2026 84th jakobkordez 🇸🇮 736 258 10ms 19 Oct 2022 84th ehulinsky 🇺🇸 736 258 10ms 9 May 2023 86th joshmoody24 734 259 11ms 14 Mar 2022 87th urojony 🇵🇱 731 260 10ms 27 May 2021 87th annaproxy 731 260 10ms 31 Oct 2021 87th Just4FunCoder 731 260 11ms 26 Oct 2022 87th cefqrn 731 260 10ms 27 Dec 2022 87th FortuiteMan 🇫🇷 731 260 10ms 11 Sep 2023 87th eiburns 731 260 10ms 9 Oct 2023 87th iliaspapa 731 260 10ms 10 Dec 2025 94th rak1507 🇬🇧 728 261 11ms 15 Oct 2020 95th yzhs 🇩🇪 725 262 10ms 25 Oct 2020 95th jacklynnepenick 725 262 10ms 14 Aug 2021 95th keegan-t 🇨🇦 725 262 10ms 20 Apr 2025 95th RaBa21 🇭🇺 725 262 10ms 21 Jul 2025 99th liamLatour 722 263 9ms 3 Aug 2024 100th CarsonChr 🇺🇸 720 264 10ms 17 Sep 2022 101st jaredtrh 714 266 11ms 12 Sep 2021 101st elgan65536 🇺🇸 714 266 10ms 15 Apr 2024 101st amberzit 714 266 10ms 3 Jul 2025 101st luuumine 🇫🇷 714 266 10ms 23 Nov 2025 105th TeddyWoodburn 709 268 117ms 7 Oct 2024 106th giacomogallina 706 269 10ms 15 Jun 2019 106th HumanoidCPU 706 269 10ms 9 May 2024 106th Trildcookie 706 269 10ms 23 Dec 2025 109th BREMAUCY 🇫🇷 704 270 10ms 7 Mar 2024 109th Jacob385 704 270 10ms 4 Apr 2024 109th rucin93 🇵🇱 704 270 10ms 31 May 2025 112th P-Quentin 🇫🇷 701 271 10ms 3 Aug 2022 112th fkantelberg 701 271 11ms 15 Jul 2025 114th schachmattmatt 699 272 11ms 11 Aug 2021 115th ZakkkkAttackkkk 🇵🇭 696 273 31ms 25 Dec 2021 115th Starwort 🇬🇧 696 273 10ms 4 Dec 2022 117th vezzick 693 274 10ms 8 Mar 2021 117th GeneralTwi 693 274 10ms 4 May 2022 119th MichalMarsalek 🇨🇿 691 275 10ms 18 Feb 2023 119th cuboids 691 275 10ms 16 Jul 2024 119th Deedogg 691 275 10ms 30 Oct 2025 122nd bthalheim 688 276 10ms 1 Aug 2022 123rd Re-Adventures 🇮🇳 686 277 9ms 30 Sep 2020 124th leon-w 683 278 10ms 4 Jan 2019 125th kimbo 🇺🇸 669 284 17ms 3 Dec 2022 126th VilBoub 667 285 10ms 17 Apr 2022 126th RJFuller 667 285 11ms 8 Mar 2024 128th NerdyMcNerd42 660 288 11ms 26 Oct 2022 128th funnsam 🇭🇰 660 288 11ms 23 Oct 2023 130th cingulataluke 657 289 10ms 26 Aug 2023 131st jiaminglimjm 🇲🇾 653 291 10ms 12 Sep 2020 132nd mokymok 🇺🇸 648 293 16ms 23 Jul 2021 133rd zhaohm14 646 294 10ms 28 May 2025 134th agreegious 644 295 10ms 17 Mar 2025 135th awnion 640 297 10ms 26 Dec 2020 135th Kyogre-Primal 🇺🇦 640 297 17ms 16 May 2025 135th Naitzirch 🇳🇱 640 297 10ms 3 Jul 2025 138th petar-donchev 635 299 9ms 7 Sep 2019 138th frankgraziano 635 299 10ms 6 Jan 2023 140th bwenstar 619 307 10ms 11 Aug 2022 141st yujqiao 603 315 11ms 15 Dec 2025 142nd try-except-try-accept 🇹🇭 597 318 10ms 9 Jul 2022 143rd CheeseCake628 🇳🇴 562 338 31ms 9 Feb 2023 144th toombs-caeman 559 340 10ms 2 Mar 2020 145th suzhaoqi 556 342 10ms 21 Aug 2024 146th skps2010 546 348 10ms 2 Jan 2019 147th kevinmchung 541 351 10ms 11 Jan 2022 148th PradCoder 523 363 10ms 6 Apr 2024 149th mhsaul 518 367 9ms 11 Apr 2023 150th magnickolas 516 368 10ms 19 Nov 2020 151st ocean0821 512 371 1,160ms 7 May 2025 152nd CedricGebistorf 509 373 10ms 7 Mar 2022 153rd ntsd 🇹🇭 501 379 11ms 18 Oct 2019 154th Bonjour27891 🇻🇳 499 381 11ms 15 Jul 2022 155th ryyyn 🇺🇸 487 390 17ms 8 Feb 2026 156th LeoTheMiner12 482 394 10ms 17 Jul 2025 157th vonKrafft 471 403 10ms 26 Mar 2020 158th byteJager 458 415 11ms 3 Jan 2021 159th xnor-gate 452 420 10ms 28 Apr 2021 160th StefanHabel 🇨🇦 448 424 10ms 26 Dec 2021 First Prev 81–160 of 1,169 Next Last
