The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Seven Segment 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 319th myleopard 348 230 10ms 13 Oct 2021 319th DoubleUynn 348 230 10ms 24 Jun 2025 323rd stordev 343 233 10ms 26 Feb 2021 323rd mothcolada 🇺🇸 343 233 10ms 25 Mar 2021 323rd sulphemi 343 233 9ms 15 May 2022 323rd Florian-Mt 343 233 10ms 14 Jul 2024 327th Heathcorp 🇦🇺 342 234 9ms 29 Oct 2022 327th cingulataluke 342 234 10ms 30 Aug 2023 329th Peter-Lande 339 236 16ms 13 Aug 2018 329th DaleNaci 339 236 15ms 13 Aug 2018 331st vonKrafft 336 238 10ms 26 Mar 2020 331st qwjhvbxi 336 238 10ms 9 Feb 2024 333rd hardlyBearable 335 239 9ms 25 May 2019 334th Bosenraum 329 243 10ms 3 Jan 2019 334th Starwort 🇬🇧 329 243 11ms 30 Mar 2019 334th amishtal 329 243 10ms 4 Dec 2019 337th wrhm 328 244 10ms 12 Dec 2020 338th pmooreh 327 245 9ms 18 Aug 2022 339th llPlayll 325 246 9ms 5 Dec 2025 340th wa1ker38552 321 249 10ms 23 May 2023 340th damoose717 321 249 9ms 25 May 2025 342nd ffelixm 320 250 10ms 4 Jul 2025 343rd Sandpaper567 319 251 17ms 13 Aug 2018 343rd UriyaBA 319 251 10ms 20 Mar 2023 345th PYRiTEmonark 317 252 16ms 23 May 2021 346th fepe55 316 253 10ms 12 Oct 2018 346th midnattssol 🇸🇪 316 253 9ms 20 Aug 2023 348th Ralac07 🇦🇺 315 254 10ms 12 Jun 2024 349th eddvrs 314 255 9ms 28 Dec 2022 349th cthierfelder 🇲🇨 314 255 13ms 6 Sep 2025 351st dillon-duncando 313 256 10ms 6 Dec 2021 352nd MiranDaniel 🇨🇿 309 259 9ms 1 Sep 2023 353rd joshmoody24 308 260 11ms 5 Mar 2022 353rd TheCod-r 🇦🇶 308 260 10ms 29 Sep 2022 353rd brimstonetrader 308 260 10ms 4 Feb 2024 353rd codingisgreatbutiamnot 308 260 10ms 14 Aug 2024 357th clayboll99 307 261 10ms 14 Jul 2025 358th adoxography 305 262 9ms 10 Oct 2019 358th AlexanderFair 305 262 9ms 26 Jul 2023 360th hthurdev 304 263 11ms 4 May 2025 361st xbxbxb007 302 265 10ms 19 Jan 2024 361st Voltrifrodec 🇸🇰 302 265 10ms 28 Apr 2025 363rd SniperSmiley 🇺🇸 300 267 10ms 24 Jun 2022 363rd avivex1000 300 267 9ms 17 Aug 2025 365th luuumine 🇫🇷 299 268 9ms 17 Oct 2025 366th badouralix 296 270 10ms 27 Feb 2021 366th mbittner20 296 270 10ms 13 Oct 2024 368th Bananapants22 295 271 10ms 17 Aug 2022 369th qalle2 294 272 9ms 20 Apr 2019 369th glesnick 294 272 10ms 6 Sep 2022 371st achow0 293 273 10ms 23 Oct 2020 371st JorenZ 293 273 9ms 10 Oct 2021 373rd kenny14231 292 274 16ms 17 Aug 2022 373rd yashima 292 274 9ms 11 Nov 2024 375th Andrey2001 291 275 10ms 13 Dec 2025 376th reedwilemon 290 276 10ms 15 Jun 2020 377th bor3ham 287 279 17ms 26 Apr 2019 378th jgermain48 286 280 10ms 29 Dec 2019 379th kpasc 285 281 10ms 23 Apr 2020 380th ljmccarthy 280 286 10ms 23 Jun 2022 381st yuchuehw 275 291 16ms 1 Jan 2024 382nd osNiko 🇧🇷 274 292 31ms 24 Dec 2025 383rd yklim 273 293 10ms 6 Apr 2019 383rd kenballus 273 293 10ms 16 May 2020 385th estomagordo 🇳🇱 271 295 10ms 3 Aug 2019 386th Sticky-Bits 270 296 10ms 26 Apr 2019 386th atazzam 🇺🇸 270 296 10ms 28 Mar 2022 388th mikaelivarsson 269 297 10ms 29 Aug 2019 388th CRHillman 269 297 10ms 15 Sep 2020 390th Mojken 268 298 16ms 2 Sep 2018 391st Razzula 266 301 10ms 3 Oct 2023 392nd sli-Lut 263 304 9ms 12 Oct 2023 393rd ComputerKWasTaken 🇺🇸 262 305 9ms 8 Jun 2024 394th dddthedark 261 306 10ms 3 Nov 2020 395th sciencejiho 260 308 10ms 24 Apr 2024 396th jlevis10 257 311 10ms 12 Oct 2023 397th n0es 254 315 9ms 12 Oct 2022 398th jalbertgordon 249 321 10ms 23 Oct 2023 399th raymur 248 323 10ms 28 Jun 2025 400th CodyMiner 245 327 10ms 26 Nov 2021 First Prev 321–400 of 429 Next Last
