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?
Christmas Trees 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 720th ieeemma 474 114 9ms 31 Jul 2019 720th mortimervonchappuis 474 114 10ms 7 Mar 2020 720th pyrolitic 🇮🇪 474 114 10ms 7 Apr 2022 720th bingbingcrosby 474 114 10ms 8 Oct 2022 720th hotmanga 474 114 10ms 17 Oct 2023 720th xbxbxb007 474 114 10ms 10 Jan 2024 727th connorwagner 470 115 10ms 26 Jun 2018 727th ktnguyen2 470 115 9ms 4 Jan 2020 727th GreenyNeko 470 115 10ms 24 Jul 2020 730th Maxou73 466 116 9ms 16 Jun 2022 730th kevinnaviapaiva 466 116 10ms 12 Feb 2025 732nd newc0m 462 117 10ms 15 Dec 2018 732nd plasmaofthedawn 462 117 10ms 19 Feb 2019 732nd befoster 462 117 9ms 10 Apr 2021 732nd shibacho 🇯🇵 462 117 10ms 18 Mar 2022 732nd Zach10za 462 117 11ms 29 Nov 2022 732nd muser-logiccpu 🇺🇦 462 117 10ms 9 Aug 2025 738th hardlyBearable 458 118 10ms 12 May 2019 738th SchmulRosenzwe1g 458 118 10ms 2 Mar 2021 738th arinhyther 458 118 10ms 16 Jan 2023 738th eddvrs 458 118 9ms 20 Dec 2023 738th JoaoFelipe3 458 118 10ms 15 Jan 2024 738th Hyperoplex145 458 118 9ms 9 Nov 2025 744th raymond-li16 454 119 10ms 10 Jul 2020 744th keegan-t 🇨🇦 454 119 11ms 18 Sep 2021 744th StoverGitHub 454 119 10ms 15 Jun 2022 744th LeoTheMiner12 454 119 9ms 12 Jul 2025 748th ramonmedeiros 450 120 10ms 15 Dec 2020 748th Techno504 450 120 9ms 22 Sep 2021 750th ArturLange 446 121 10ms 17 Apr 2020 750th sli-Lut 446 121 9ms 11 Oct 2023 752nd mkski 439 123 10ms 9 Jun 2019 752nd MattUDCompSci 439 123 9ms 22 Sep 2022 754th jmjaggi1202 435 124 10ms 13 Dec 2023 755th fabs1 432 125 9ms 22 Mar 2019 755th dcure73 432 125 9ms 7 Jun 2019 755th cross 432 125 10ms 9 Nov 2024 755th Rago-Tony 432 125 9ms 24 Jun 2025 755th plopa1 432 125 10ms 15 Sep 2025 760th cseiter 429 126 10ms 22 Jun 2022 760th sgaltair 429 126 10ms 22 Feb 2023 762nd ClasherKasten-zz 425 127 10ms 3 May 2020 762nd jackdonofrio 425 127 9ms 25 Sep 2020 762nd freerainboxbox 425 127 9ms 23 Jul 2021 762nd AleksKnezevic 425 127 10ms 21 Feb 2024 766th Nick-Sullivan 422 128 10ms 12 Dec 2021 766th Rambso 422 128 9ms 19 Feb 2023 768th niallcurtis 419 129 10ms 8 Dec 2020 768th Nibamot 419 129 11ms 17 Dec 2021 770th anclrii 415 130 9ms 14 Feb 2023 771st Guptacos 412 131 10ms 29 Mar 2021 771st Creator-land 412 131 10ms 30 Nov 2023 773rd zstearman3 406 133 9ms 23 Apr 2020 773rd JackSealy 406 133 10ms 17 Feb 2021 775th jgermain48 403 134 10ms 9 Dec 2019 775th TheBitShepherd 403 134 10ms 5 Apr 2021 775th JakeI 403 134 10ms 15 Jun 2021 778th chris3145 397 136 9ms 30 Jun 2022 779th Dejgz 394 137 9ms 11 Sep 2023 780th AreYouW 391 138 10ms 6 Dec 2019 781st CRHillman 388 139 10ms 17 Aug 2018 781st rowboat1 388 139 10ms 10 Jun 2022 781st alfonsoalves 388 139 10ms 21 Jul 2024 784th jhawk101 380 142 10ms 12 Mar 2021 785th Crito02 378 143 10ms 2 Mar 2021 786th Thive-N 372 145 10ms 10 Oct 2020 787th DGipe 370 146 9ms 2 Dec 2022 788th dylanjones92 367 147 9ms 22 Jan 2024 789th jcrutle 362 149 10ms 30 Mar 2021 789th MiranDaniel 🇨🇿 362 149 10ms 30 Aug 2023 791st jimenez20 360 150 10ms 16 Dec 2019 791st elekktrozone 360 150 10ms 6 Dec 2021 791st NoneTheFewer 360 150 10ms 25 Dec 2025 794th warrinerbros 358 151 10ms 7 Dec 2021 795th oAsAo 355 152 11ms 21 Jan 2020 796th TheAtrossian 348 155 10ms 5 Jan 2025 797th jersonjgarcia 335 161 10ms 22 Sep 2020 798th Crankbrother 333 162 10ms 26 Jun 2020 799th tmanternach 325 166 10ms 23 Nov 2022 800th danwley 323 167 10ms 29 Jul 2019 First Prev 721–800 of 849 Next Last
