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?
Morse Encoder in all languages 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 721st alphafalfa 274 547 2ms 24 Oct 2024 722nd TheAristos 273 341 11ms 30 Oct 2019 723rd madex 🇩🇪 273 400 11ms 23 Jun 2024 724th vgamula 🇺🇦 272 343 10ms 7 Jul 2025 725th shaunjc 272 401 10ms 10 Jun 2021 726th MeWhenI 🇻🇦 272 971 2ms 8 Feb 2022 727th MeWhenI 🇻🇦 271 662 141ms 22 Mar 2024 728th OllieBoyne 🇬🇧 270 345 11ms 23 Jan 2021 729th codewrite 🇬🇧 269 347 10ms 12 Jul 2025 730th p-vf 🇨🇭 269 397 528ms 29 Sep 2021 731st Kibble 269 406 11ms 13 Jul 2020 732nd SoliGhost 268 348 12ms 8 Jun 2025 733rd Waffle3z 267 302 36ms 22 Jan 2021 734th jfallon1997 266 350 10ms 13 May 2024 735th dzshn 265 352 10ms 25 Nov 2020 735th stordev 265 352 12ms 26 Feb 2021 735th 77Tigers 265 352 10ms 28 May 2021 738th dokutan 265 697 103ms 5 days ago 739th aksyristos 264 353 10ms 14 Mar 2023 740th TheZwierzLF 🇵🇱 263 328 541ms 8 Dec 2025 741st d4rkne55 263 430 5ms 1 Mar 2018 742nd betaveros 261 357 9ms 1 Jan 2023 743rd richard-oelze 🇩🇪 260 358 10ms 20 Mar 2021 744th perlebach 🇨🇿 259 265 3ms 17 Aug 2021 745th CheeseCake628 🇳🇴 259 333 524ms 18 Oct 2025 746th DmytroLynda 259 411 445ms 21 Nov 2024 747th CaedenHarper 🇨🇦 258 362 10ms 10 Oct 2024 748th Chinay-Domitrix 🇺🇸 256 403 3,508ms 25 Feb 2026 749th eiburns 255 365 10ms 8 May 2023 749th PotatoSaladOverlord 255 365 9ms 16 Jan 2024 751st temoto 254 367 10ms 20 Sep 2018 752nd mogensen 254 634 329ms 17 Apr 2020 753rd brochmann 🇸🇪 252 370 10ms 9 Feb 2022 753rd m42km 252 370 12ms 23 Oct 2023 753rd ridingqwerty 🇺🇸 252 370 11ms 3 Dec 2023 753rd klixel 🇨🇦 252 370 9ms 23 Jan 2025 757th nephila-nacrea 🇬🇧 251 273 3ms 24 Jun 2020 758th 4ndyJ 🇬🇧 251 372 10ms 19 Jun 2025 759th CaedenHarper 🇨🇦 250 345 805ms 19 Jan 2025 760th ragerin 250 373 17ms 21 Feb 2018 761st mokymok 🇺🇸 249 374 11ms 1 Dec 2021 762nd sergeyz7 🇬🇧 248 372 246ms 18 Nov 2020 763rd croc54 248 376 10ms 14 Jan 2025 764th dokutan 248 1,066 2ms 13 Nov 2024 765th dokutan 247 457 217ms 3 Feb 2026 766th SiddharthShyniben 243 449 11ms 10 Aug 2021 767th wrhm 242 385 11ms 12 Dec 2020 768th jhpaques 🇫🇷 242 386 10ms 29 Jul 2022 769th denkyuu1 241 334 35ms 27 days ago 770th Agazoth 240 384 318ms 12 Jun 2020 771st michelebastione 🇮🇹 240 388 11ms 21 Mar 2022 772nd Openstreetmapler 239 390 11ms 23 Nov 2019 773rd madex 🇩🇪 237 393 10ms 23 Jun 2024 774th Pena86 236 395 11ms 30 Dec 2021 774th ellis-rix 236 395 10ms 12 Jun 2023 776th shaunjc 236 479 5ms 11 Jun 2021 777th lahell 235 393 283ms 8 Jun 2020 778th johnennewdeeson 235 464 10ms 6 Apr 2020 779th jotslo 🇬🇧 234 399 12ms 5 Jul 2021 780th dokutan 234 1,481 2ms 12 May 2023 781st Mikey-Beep 🇬🇧 231 404 11ms 25 Aug 2023 782nd Cr3aHal0 231 472 12ms 28 Jun 2019 783rd rbicelli 231 490 5ms 4 Apr 2018 784th CaedenHarper 🇨🇦 231 697 308ms 28 Oct 2025 785th madex 🇩🇪 230 350 39ms 23 Jun 2024 786th bsoyka 🇺🇸 230 406 10ms 9 Jan 2022 787th RealAMC 🇳🇿 229 527 2ms 22 Nov 2023 788th CarterStroik 229 644 2ms 12 Nov 2025 789th wes-sleeman 229 657 1,384ms 29 Sep 2021 790th Ashikpaul 🇮🇳 228 479 11ms 30 Jul 2022 791st eddvrs 227 410 11ms 20 Aug 2022 792nd dokutan 227 791 145ms 16 Jan 2026 793rd lrustand 226 412 11ms 19 Feb 2018 794th KatieLG 🇬🇧 226 673 3ms 24 Sep 2022 795th dokutan 225 672 6ms 10 Sep 2025 796th cafehaine 🇫🇷 224 660 2ms 27 Jul 2018 797th brandon-04 223 479 416ms 11 Nov 2025 798th d4rkne55 222 492 10ms 28 Feb 2018 799th Maximizer02 222 559 7ms 30 Jul 2024 800th markbyrne 221 421 11ms 25 Oct 2020 First Prev 721–800 of 1,003 Next Last
