The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Morse Encoder 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 80th BREMAUCY 🇫🇷 511 186 10ms 21 Aug 2025 82nd CedricGebistorf 508 187 10ms 4 Mar 2022 82nd pyrolitic 🇮🇪 508 187 19ms 6 Apr 2022 82nd ahmetdemirag 🇨🇾 508 187 10ms 19 Nov 2024 85th FortuiteMan 🇫🇷 505 188 11ms 18 Dec 2025 86th SniperSmiley 🇺🇸 500 190 11ms 23 Jun 2021 87th Informagier 497 191 18ms 16 Sep 2020 88th PatrickStephansen 🇿🇦 492 193 17ms 23 Aug 2023 89th RaBa21 🇭🇺 487 195 17ms 14 Jul 2025 90th Mabeloid 🇳🇴 485 196 10ms 21 Sep 2024 91st m-tkach 🇺🇦 480 198 11ms 13 Feb 2023 92nd kevinmchung 477 199 18ms 24 Feb 2018 93rd SB-945 475 200 18ms 4 Sep 2023 93rd Jacob385 475 200 13ms 1 May 2024 95th StefanHabel 🇨🇦 473 201 10ms 19 days ago 96th sambirnbaum1 470 202 10ms 13 Oct 2019 97th davitf 461 206 11ms 31 Oct 2018 98th skps2010 457 208 17ms 29 Dec 2018 98th yzhs 🇩🇪 457 208 10ms 25 Oct 2020 100th msrawson 455 209 10ms 1 Sep 2018 101st andrewjc2000 450 211 10ms 18 Jul 2025 102nd hoodadam 448 212 12ms 12 Jun 2019 102nd mhsaul 448 212 12ms 10 Apr 2023 102nd ceeb9 448 212 13ms 14 Jun 2024 102nd Pulencode 🇨🇨 448 212 10ms 17 Nov 2024 106th pickerj 442 215 11ms 4 Jun 2024 106th frankgraziano 442 215 16ms 5 Apr 2025 108th Indivicivet 440 216 19ms 19 Oct 2021 109th ArmaanAS 436 218 10ms 26 Mar 2021 109th Lwi-Sandwich 436 218 11ms 20 Jul 2023 111th zuparnowa 430 221 10ms 8 Feb 2019 111th froggy2001 430 221 17ms 16 Feb 2023 113th mathisfun271 419 227 10ms 18 Dec 2023 113th yuchuehw 419 227 10ms 4 Jan 2024 115th amollberg 🇸🇪 415 229 18ms 16 Jan 2022 116th ejmejm 413 230 10ms 2 Dec 2021 117th argusdusty 🇺🇸 408 233 17ms 11 Jan 2021 117th moustave 408 233 10ms 28 Mar 2025 119th Phanabani 🇺🇸 396 240 10ms 22 Oct 2020 120th bastienvoirin 🇫🇷 386 246 12ms 30 Nov 2020 121st petar-donchev 378 251 11ms 7 Sep 2019 122nd Yewzir 🇧🇪 373 255 11ms 19 May 2023 122nd Babafaba 373 255 17ms 11 Nov 2025 124th Bonjour27891 🇻🇳 365 260 13ms 10 Apr 2022 125th ImpressedByRocks 364 261 15ms 19 Sep 2022 126th InigoK 🇺🇸 363 262 10ms 15 Jun 2023 127th EnviloN 🇨🇿 361 263 10ms 20 Oct 2024 127th JunkIce 361 263 16ms 12 Feb 2025 129th msbranicky 360 264 18ms 3 Jul 2023 130th fgrosshans 🇫🇷 354 268 11ms 9 Jul 2024 131st yokasuretsu 353 269 10ms 19 Apr 2018 132nd nullie 349 272 11ms 9 Jun 2022 133rd eshilo-draper 341 279 10ms 21 Sep 2022 133rd Ythaenagor 341 279 10ms 5 Aug 2024 135th geofft 339 280 11ms 14 Dec 2020 136th Re-Adventures 🇮🇳 338 281 14ms 10 Oct 2020 137th luuumine 🇫🇷 337 282 11ms 27 Oct 2025 138th neihousaigaai 333 285 12ms 27 Dec 2021 139th guilhem-roy 🇫🇷 326 291 11ms 3 Mar 2022 140th evanrittner 325 292 10ms 26 Feb 2021 140th randolchance 325 292 10ms 20 Jun 2025 142nd jmerle 🇳🇱 323 294 12ms 11 Jul 2023 143rd martinnorling 🇸🇪 321 296 10ms 22 Feb 2022 144th relet 320 297 17ms 9 Aug 2018 145th mizuzimu 319 298 11ms 12 Apr 2020 146th alangodfrey 318 299 16ms 31 Jan 2019 146th ianpoe 318 299 11ms 20 Apr 2020 148th mbittner20 316 301 10ms 21 Jan 2024 149th zdzc 314 303 20ms 30 Mar 2018 150th kypi 313 304 10ms 20 Feb 2020 150th lhulinsky 313 304 10ms 22 Oct 2024 152nd try-except-try-accept 🇹🇭 308 308 10ms 28 Jun 2022 153rd osmith93 307 309 17ms 1 Aug 2021 153rd Pyroan 307 309 11ms 22 Feb 2025 155th logvp 305 311 18ms 31 Jan 2024 155th cykim8811 305 311 16ms 10 Jul 2024 157th gXLg 🇩🇪 304 312 11ms 19 Sep 2023 157th andre-lameirinhas 🇵🇹 304 312 10ms 30 Nov 2023 159th inverseLorentz 🇦🇺 303 314 11ms 21 Jun 2022 160th decorator-factory 302 315 10ms 21 May 2019 First Prev 81–160 of 286 Next Last
