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 640th Schreipfelerer 529 102 10ms 27 Nov 2023 640th epic-programmer-guy 529 102 9ms 25 Dec 2023 643rd estomagordo 🇳🇱 524 103 10ms 2 Feb 2020 643rd goombado 524 103 9ms 14 Oct 2020 643rd asadullayev 524 103 9ms 5 Mar 2021 643rd bbakersmith 524 103 17ms 1 Jul 2021 643rd LukasFolwarczny 🇨🇿 524 103 9ms 17 Sep 2022 643rd goGuru 524 103 9ms 17 Dec 2022 643rd roylucas 524 103 9ms 16 Jan 2023 643rd Joe85gr 524 103 16ms 30 Sep 2023 643rd l-donovan 524 103 9ms 6 Feb 2024 643rd NickTheEASDude 🇺🇸 524 103 10ms 11 Apr 2024 643rd firegene 🇮🇪 524 103 10ms 16 Feb 2026 643rd jusaka 524 103 10ms 6 days ago 655th babulibaba 519 104 9ms 15 Aug 2019 655th besasam 519 104 9ms 31 Mar 2021 655th Hunter-Fairchild 519 104 9ms 30 Aug 2022 655th anonymaew 519 104 10ms 3 Aug 2023 655th azure-blondon 519 104 10ms 10 Feb 2024 655th RobertHoeh 519 104 9ms 16 May 2024 655th DanielBash 519 104 10ms 16 Feb 2025 655th Sharrrkkk 519 104 10ms 21 Jul 2025 663rd hjcafaroUC 514 105 10ms 1 Aug 2020 663rd wrhm 514 105 9ms 12 Dec 2020 663rd gheissen 514 105 9ms 23 Dec 2020 663rd krcs 🇵🇱 514 105 10ms 27 Dec 2021 663rd alytarik 514 105 11ms 11 Jan 2022 663rd petroselo 514 105 10ms 12 Apr 2022 663rd jamespeilunli 514 105 11ms 29 Apr 2022 663rd Techdude01 514 105 10ms 21 Dec 2023 663rd aarooosh 514 105 9ms 8 Aug 2024 663rd nemoyatpeace 514 105 10ms 14 Jan 2026 673rd Adi-K527 509 106 9ms 24 Apr 2021 673rd mokymok 🇺🇸 509 106 11ms 23 Jul 2021 673rd jbrry 509 106 11ms 5 Jul 2022 673rd bartvw 509 106 9ms 28 Oct 2022 673rd asmull 509 106 10ms 20 Nov 2023 673rd gautambp 509 106 11ms 30 Jun 2025 673rd codewrite 🇬🇧 509 106 10ms 4 Jul 2025 673rd Mefred 509 106 10ms 30 Jan 2026 681st kusti8 505 107 9ms 30 Jul 2019 681st ValdeQwerty 505 107 10ms 27 Nov 2019 681st Nordle 505 107 10ms 28 Feb 2020 681st cole-wilson 505 107 10ms 3 Dec 2020 681st NicoAdams 505 107 10ms 21 Nov 2021 681st CuboidRaptor 🇨🇦 505 107 10ms 18 Jan 2022 681st twocatsinatrenchcoat 505 107 9ms 5 May 2022 681st 6lr61 505 107 10ms 1 Dec 2022 681st Smorgasaurus 505 107 10ms 15 Apr 2023 690th ridingqwerty 🇺🇸 500 108 10ms 22 Dec 2023 690th CyberTapir 500 108 10ms 1 Sep 2024 690th Deppyforce 500 108 10ms 12 days ago 693rd wilkij1 495 109 10ms 16 Jun 2018 693rd h-hh-hhh 🇺🇦 495 109 10ms 10 Jan 2022 693rd Trunksistor 🇫🇷 495 109 9ms 21 Apr 2022 693rd jorisbertram 495 109 10ms 26 Aug 2022 693rd JakeDaCake36 495 109 11ms 18 Feb 2024 698th tkwa 491 110 10ms 4 Dec 2018 698th ionutm82 491 110 10ms 18 Dec 2018 698th zuparnowa 491 110 9ms 28 Jan 2019 698th henrytranter 491 110 10ms 20 Sep 2019 698th cthierfelder 🇲🇨 491 110 10ms 13 Nov 2025 703rd adoxography 486 111 9ms 21 May 2018 703rd Bananapants22 486 111 10ms 21 Sep 2022 703rd Nightmarius 486 111 10ms 19 Jan 2024 706th GeoffroyF 482 112 10ms 14 May 2018 706th SimonPeatman 482 112 10ms 29 Dec 2018 706th LaisaLI 482 112 10ms 4 Oct 2019 706th JorenZ 482 112 9ms 10 Oct 2021 706th LeeCamp 482 112 10ms 27 Nov 2021 706th dragonshadows07 482 112 9ms 7 Feb 2024 706th mbittner20 482 112 10ms 21 Sep 2024 706th chenyuan33 482 112 9ms 21 Feb 2026 714th jackkav 478 113 10ms 20 Jan 2019 714th goliwok 478 113 9ms 8 Aug 2020 714th mrmena 🇦🇺 478 113 10ms 22 Jun 2021 714th raphaelimahorn 478 113 9ms 3 Aug 2021 714th zwxzwxzwx21 478 113 10ms 18 Jan 2024 714th julian-hoelz 478 113 9ms 16 Sep 2024 720th bkshrader 474 114 9ms 19 Mar 2019 First Prev 641–720 of 849 Next Last
