The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 days. Why not try and solve them ahead of time?
Arabic to Roman 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 401st OppositeShark 315 279 18ms 7 Apr 2022 402nd mothcolada 🇺🇸 313 281 19ms 26 Feb 2021 403rd sleepyStick 310 284 21ms 4 Dec 2021 403rd atazzam 🇺🇸 310 284 27ms 3 Apr 2022 405th CoolBvll 309 285 20ms 12 Jun 2025 406th Akilles1 308 286 50ms 25 Apr 2025 407th veitkrapf 306 288 18ms 7 Oct 2021 407th GeneralFabian 306 288 30ms 14 Dec 2024 409th ArturLange 304 289 23ms 14 Sep 2018 409th jan-Simiman 304 289 19ms 16 Oct 2024 411th LlamaLad7 🇬🇧 303 290 24ms 17 Jan 2021 411th tayshaver10 303 290 20ms 29 Apr 2025 413th jeaosh 301 292 42ms 22 Oct 2022 413th OSYCh314 🇦🇺 301 292 19ms 16 Nov 2024 415th IoLimmer 295 298 18ms 17 Jan 2025 416th yuchuehw 292 301 25ms 28 Jan 2024 416th alfonsoalves 292 301 22ms 29 Feb 2024 416th sreyfe 292 301 22ms 23 Mar 2025 419th 2011-Chan-Ethan 289 304 17ms 17 Jul 2023 420th tpolster 288 306 19ms 9 Oct 2024 421st azierariel 286 308 21ms 20 Dec 2020 422nd themtamejaws 285 309 21ms 28 May 2020 422nd mrmena 🇦🇺 285 309 24ms 1 Jun 2021 424th michelebastione 🇮🇹 284 310 21ms 21 Oct 2019 425th jgermain48 283 311 18ms 9 Dec 2019 426th feherd 280 314 32ms 20 May 2022 427th C3P-Oops 279 315 22ms 24 Jan 2023 428th pecholsjones 270 326 20ms 9 Dec 2021 429th newc0m 268 328 22ms 15 Dec 2018 430th hymanimy 266 331 35ms 8 Jan 2022 431st PFischbeck 265 332 18ms 28 Nov 2017 432nd DrPrettyman 263 334 21ms 4 Jul 2023 433rd alexjurkiewicz 🇦🇺 261 337 19ms 14 Jul 2022 434th ImQWERTY39 259 340 19ms 2 Sep 2023 435th fl3ur1nestimable 255 345 19ms 28 Mar 2022 436th DerivingDrunk 254 346 19ms 14 Sep 2025 437th Trunksistor 🇫🇷 251 350 24ms 23 May 2022 438th titrok0982 242 363 19ms 24 Jul 2022 439th AforAmpere 238 370 22ms 7 Jun 2020 439th Bit125 238 370 20ms 11 Feb 2025 441st usnheckler 234 376 21ms 6 Jun 2019 441st TheAtrossian 234 376 18ms 5 Jan 2025 443rd Saaxxx 230 382 22ms 29 Nov 2023 444th Primedavid06 229 385 17ms 5 May 2025 445th DiyaKumariGupta 226 389 20ms 6 May 2025 446th adesanjo 222 397 19ms 12 Jun 2018 447th Mikey-Beep 🇬🇧 219 402 20ms 5 Oct 2022 448th JakeSummers1 218 403 20ms 4 May 2025 449th TJK-S 217 405 19ms 30 Nov 2025 450th yvngbvshwookie 215 409 20ms 3 May 2025 451st LizzardTheWizzard 215 410 19ms 4 May 2025 452nd jsvizcaino 214 412 21ms 17 Oct 2022 453rd estomagordo 🇳🇱 213 413 19ms 5 Aug 2019 453rd mhenion8293 🇺🇸 213 413 21ms 13 Jan 2022 453rd smilesformiles3 213 413 18ms 15 Jun 2025 456th ethandhunt 213 414 28ms 20 Jul 2021 457th ValdeQwerty 205 430 26ms 27 Nov 2019 458th rcs0252 203 433 19ms 6 May 2025 459th iwe0003 202 435 18ms 6 May 2025 460th amritm55 200 439 18ms 1 May 2025 461st Martin-Regan 200 440 22ms 4 Feb 2025 462nd ShawnPan9376 199 443 21ms 30 Apr 2025 463rd sakshiPatel2602 194 453 18ms 5 May 2025 464th MostValue 193 455 20ms 29 Aug 2023 465th kalehika1234 193 457 19ms 30 Apr 2025 466th zaironwhite 191 460 23ms 6 May 2025 467th Rowen-Salazar 190 463 18ms 3 May 2025 468th dylanjones92 174 506 33ms 29 Jan 2024 469th jac1107 173 508 18ms 6 May 2025 470th besasam 170 517 19ms 31 Mar 2021 471st goodrichster 165 532 17ms 20 Dec 2024 471st AshayP123 165 532 19ms 30 Apr 2025 473rd chaamsak 163 539 20ms 5 May 2025 474th GolfGPT 155 567 19ms 19 Nov 2023 475th jtb0362 150 586 18ms 6 May 2025 476th cnc0256 149 592 19ms 5 May 2025 477th Kunsangrg 146 602 19ms 6 May 2025 478th aidnrox 141 626 19ms 2 May 2025 478th LyndaS317 141 626 20ms 7 May 2025 480th ch-1016 133 663 20ms 6 May 2025 First Prev 401–480 of 507 Next Last
