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?
Pascal’s Triangle 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 309th ehulinsky 🇺🇸 676 74 11ms 27 Sep 2021 309th BrenSchaap 676 74 9ms 20 Oct 2021 309th MichalMarsalek 🇨🇿 676 74 10ms 3 Dec 2021 309th LeeCamp 676 74 9ms 9 Dec 2021 309th guilhem-roy 🇫🇷 676 74 10ms 25 Feb 2022 309th gitbedd 🇬🇧 676 74 10ms 1 Apr 2022 309th AdamHe17 676 74 10ms 31 May 2022 309th jfallon1997 676 74 9ms 11 Aug 2022 309th smartiel 676 74 12ms 16 Sep 2022 309th MaxElf999 676 74 10ms 30 Sep 2022 309th za3k 676 74 10ms 16 Oct 2022 309th b10011 🇫🇮 676 74 9ms 8 Jan 2023 309th nstearns96 🇬🇧 676 74 10ms 10 Jan 2023 309th NDR0216 🇹🇼 676 74 9ms 10 Feb 2023 309th falsidge 676 74 9ms 20 Jun 2023 309th ssbhatt4321 676 74 10ms 14 Oct 2023 309th inverseLorentz 🇦🇺 676 74 10ms 9 Apr 2024 309th CutSandstone 676 74 10ms 4 Jul 2024 309th cuboids 676 74 10ms 11 Jul 2024 309th Mathrew2012 676 74 9ms 15 Aug 2024 309th Pyroan 676 74 9ms 22 Feb 2025 309th ToE42 676 74 9ms 16 May 2025 309th Emutis 🇱🇹 676 74 10ms 6 Oct 2025 309th denkyuu1 676 74 10ms 7 Feb 2026 309th Aquateraneal 🇺🇸 676 74 10ms 3 days ago 346th rschwa6308 🇺🇸 667 75 10ms 2 Apr 2019 346th giacomogallina 667 75 9ms 14 Oct 2019 346th Haksell 🇦🇶 667 75 15ms 1 Dec 2019 346th bastienvoirin 🇫🇷 667 75 10ms 5 Apr 2020 346th pavi2410 667 75 10ms 26 Aug 2020 346th derekthatcher 667 75 10ms 22 Sep 2020 346th Estuardicue 667 75 9ms 24 Mar 2021 346th PhysicDev 🇫🇷 667 75 10ms 16 Mar 2022 346th VilBoub 667 75 10ms 17 Apr 2022 346th Trunksistor 🇫🇷 667 75 10ms 25 Apr 2022 346th badboj40 667 75 10ms 22 Mar 2023 346th kyleclaassen 667 75 9ms 28 May 2023 346th msbranicky 667 75 10ms 1 Jul 2023 346th smokestacklightnin 🇺🇸 667 75 10ms 10 Jan 2024 346th PyryL 🇫🇮 667 75 9ms 22 Aug 2024 346th alemelis 667 75 11ms 13 Oct 2024 346th benvreeves 667 75 11ms 25 Jul 2025 363rd elteammate 658 76 9ms 7 Jul 2020 363rd argusdusty 🇺🇸 658 76 12ms 31 Dec 2020 363rd hakr14 658 76 10ms 12 Jul 2021 363rd Bonjour27891 🇻🇳 658 76 11ms 4 Mar 2022 363rd anonymaew 658 76 11ms 25 Mar 2022 363rd countlpaul-dotcom 658 76 10ms 19 Oct 2025 369th ian-h-chamberlain 🇺🇸 649 77 9ms 29 Dec 2019 369th dmoa 649 77 10ms 22 May 2020 369th PkmnQ 649 77 11ms 8 Apr 2021 369th egh 649 77 10ms 27 May 2021 369th pengu1n-master 649 77 10ms 11 Oct 2021 369th karhuthebear 649 77 9ms 11 May 2022 369th pfysches-boop 649 77 10ms 6 Aug 2023 369th dranjohn 649 77 10ms 24 Sep 2023 369th yuchuehw 649 77 10ms 17 May 2024 369th Mabeloid 🇳🇴 649 77 11ms 3 Oct 2024 369th agreegious 649 77 10ms 17 Mar 2025 380th handisb 641 78 9ms 8 Nov 2019 380th face0xff 641 78 9ms 3 Nov 2021 380th pascscha 641 78 9ms 28 Mar 2022 380th CheeseCake628 🇳🇴 641 78 10ms 18 Feb 2023 380th gamk3 641 78 9ms 6 May 2025 380th robin-scragg 641 78 10ms 5 Jul 2025 380th fredrik-bakke 🇳🇴 641 78 10ms 26 Oct 2025 387th Gymhgy 633 79 10ms 21 Apr 2019 387th Mathgeek007 633 79 9ms 19 Jan 2020 387th Brianzhengca 633 79 11ms 2 Feb 2021 387th Anonymousellama21 633 79 11ms 30 Dec 2021 387th xnacly 🇩🇪 633 79 10ms 5 Jul 2023 387th zgialor-lab 633 79 10ms 17 Dec 2025 393rd temich-nosov 625 80 9ms 9 Feb 2018 393rd bkshrader 625 80 9ms 29 Dec 2018 393rd decorator-factory 625 80 10ms 27 May 2019 393rd kypi 625 80 9ms 16 Feb 2020 393rd oplxy 625 80 10ms 23 Mar 2021 393rd chethus 625 80 10ms 22 Nov 2021 393rd Starwort 🇬🇧 625 80 10ms 11 Nov 2022 393rd kaptsanovb 625 80 10ms 20 Apr 2023 First Prev 321–400 of 697 Next Last
