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 Decoder 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 Babafaba 433 210 12ms 23 Nov 2025 82nd nullie 431 211 10ms 9 Jun 2022 83rd commandz0 🇺🇸 427 213 15ms 6 Apr 2023 84th The3gs 425 214 10ms 13 Oct 2020 84th RaBa21 🇭🇺 425 214 17ms 18 Jul 2025 86th sambirnbaum1 423 215 20ms 13 Oct 2019 86th cros107 🇦🇺 423 215 17ms 10 Sep 2025 86th Lv0Sys 🇵🇱 423 215 10ms 30 Nov 2025 89th Mabeloid 🇳🇴 421 216 10ms 12 Sep 2024 90th hoodadam 419 217 9ms 11 Jun 2019 90th abailey2020 🇺🇸 419 217 10ms 19 Aug 2020 90th CedricGebistorf 419 217 9ms 20 Feb 2022 90th SB-945 419 217 11ms 10 Mar 2024 94th Troon 416 219 16ms 21 Oct 2022 95th andrewjc2000 414 220 10ms 16 Jul 2025 96th Starwort 🇬🇧 410 222 12ms 10 Feb 2020 97th pyrolitic 🇮🇪 404 225 11ms 6 Apr 2022 98th alangodfrey 403 226 10ms 31 Jan 2019 99th knutae 🇳🇴 401 227 11ms 21 Aug 2021 100th vezzick 399 228 10ms 6 Mar 2021 101st kevinmchung 397 229 11ms 24 Feb 2018 102nd msrawson 396 230 10ms 2 Sep 2018 102nd ydevor 🇮🇱 396 230 10ms 16 Feb 2021 104th bastienvoirin 🇫🇷 392 232 10ms 5 Apr 2020 105th jameswmccarty 391 233 10ms 7 Mar 2025 106th ImpressedByRocks 384 237 14ms 20 Sep 2022 107th benwilliamgraham 382 238 11ms 10 Nov 2021 108th ArmaanAS 378 241 11ms 25 Mar 2021 109th yuchuehw 374 243 11ms 4 Jan 2024 109th CLOStrophobic 🇮🇹 374 243 10ms 26 Jan 2025 111th dtbao20 🇻🇳 368 247 11ms 1 Oct 2024 111th InigoK 🇺🇸 368 247 10ms 6 Sep 2025 113th scpchicken 🇵🇼 367 248 16ms 7 Apr 2022 114th skps2010 365 249 16ms 28 Dec 2018 114th Indivicivet 365 249 10ms 18 Oct 2021 116th Phanabani 🇺🇸 361 252 10ms 22 Oct 2020 117th cellobix 358 254 17ms 15 Aug 2019 118th Ted-Barrett 🇦🇺 357 255 10ms 1 Oct 2021 119th daedals 354 257 17ms 21 Jun 2019 119th rollershutter 354 257 11ms 9 Sep 2022 121st schachmattmatt 350 260 10ms 20 Aug 2021 122nd hiichbindermax 346 263 10ms 22 Nov 2025 123rd robin-scragg 345 264 11ms 23 Jul 2025 124th yokasuretsu 343 265 10ms 26 Apr 2018 124th petar-donchev 343 265 10ms 8 Sep 2019 124th JunkIce 343 265 17ms 24 Nov 2024 127th krcs 🇵🇱 342 266 10ms 30 Jun 2023 128th Dazza314 🇬🇧 341 267 10ms 4 Nov 2020 129th myfatemi04 340 268 10ms 20 Sep 2018 129th Evan-Robotics 340 268 10ms 28 Jan 2022 131st Bonjour27891 🇻🇳 338 269 12ms 20 Mar 2022 132nd glesnick 335 272 10ms 15 Jul 2022 133rd bkshrader 332 274 16ms 27 Dec 2018 134th geofft 331 275 10ms 13 Dec 2020 134th mbittner20 331 275 10ms 21 Jan 2024 136th DrakeSeteraO 330 276 10ms 10 Nov 2025 136th GodlyProgrammer1 330 276 19ms 22 Nov 2025 138th naveenarun 326 279 10ms 6 Jun 2019 139th NanduBC 325 280 11ms 22 Mar 2021 140th Emutis 🇱🇹 324 281 10ms 14 Nov 2025 141st amollberg 🇸🇪 319 285 17ms 15 Jan 2022 142nd luuumine 🇫🇷 318 286 10ms 29 Oct 2025 143rd karhuthebear 314 290 10ms 5 May 2022 143rd SniperSmiley 🇺🇸 314 290 10ms 4 Jul 2022 145th davecame 313 291 10ms 15 Mar 2024 146th JVerwolf 312 292 15ms 27 Aug 2021 147th Yewzir 🇧🇪 311 293 10ms 19 May 2023 148th BenBanerjeeRichards 303 300 10ms 12 Nov 2021 149th fgrosshans 🇫🇷 299 304 10ms 9 May 2023 150th eiburns 294 309 10ms 25 Aug 2023 151st jmerle 🇳🇱 291 313 10ms 11 Jul 2023 152nd mizuzimu 289 315 11ms 16 Mar 2021 153rd mathisfun271 286 318 10ms 19 Feb 2024 154th patbassing 285 319 10ms 8 Jul 2019 154th dymowski 285 319 10ms 3 Jan 2020 156th NicoAdams 279 326 10ms 30 Dec 2021 157th relet 277 328 16ms 9 Aug 2018 157th TobyBoyne 🇬🇧 277 328 13ms 15 Apr 2022 159th zdzc 277 329 11ms 1 Apr 2018 160th LeeCamp 276 330 18ms 25 Dec 2021 First Prev 81–160 of 258 Next Last
