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 Decoder 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 641st MeWhenI 🇻🇦 241 837 4ms 27 Jul 2023 642nd febiw 240 371 10ms 22 Mar 2020 643rd CaedenHarper 🇨🇦 240 762 306ms 28 Oct 2025 644th zakariamouhid 237 409 11ms 2 Aug 2023 645th ereztaiar 🇮🇱 237 410 13ms 11 Sep 2021 646th SirFireball3521 235 276 138ms 1 Mar 2023 647th TheEric0802 🇩🇪 235 575 2ms 22 Sep 2023 648th LorenzoTa 234 259 4ms 27 Apr 2019 649th MeWhenI 🇻🇦 234 439 3ms 25 Dec 2025 650th 71c 233 381 10ms 29 Apr 2018 651st wrhm 233 382 13ms 15 Dec 2020 652nd dokutan 233 446 4ms 20 Apr 2025 653rd dokutan 233 581 2ms 24 Dec 2024 654th msbranicky 232 384 10ms 3 Jul 2023 655th The-Wolfson 232 667 740ms 1 Nov 2024 656th JRaspass 🇬🇧 231 262 3ms 5 Sep 2021 657th dokutan 231 283 32ms 21 Apr 2025 658th Agazoth 230 370 277ms 12 Jun 2020 659th madex 🇩🇪 230 386 11ms 12 May 2024 660th lowlighter 228 426 10ms 1 Nov 2020 661st dokutan 228 451 3ms 9 Dec 2024 662nd varhammer 225 583 8ms 5 Mar 2022 663rd KatieLG 🇬🇧 225 689 210ms 31 May 2021 664th msbranicky 223 384 714ms 17 Jan 2024 665th GWStuart 223 399 10ms 27 Jan 2023 666th nephila-nacrea 🇬🇧 222 273 3ms 21 Mar 2018 667th codewrite 🇬🇧 221 403 10ms 12 Jul 2025 668th labster 219 277 3ms 25 Feb 2018 669th meenie 219 298 38ms 21 Jan 2023 670th JoeBigToe 219 390 274ms 5 Jun 2020 671st KatieLG 🇬🇧 219 708 696ms 29 May 2021 672nd dokutan 219 834 341ms 4 Feb 2025 673rd ellis-rix 218 408 11ms 12 Jun 2023 674th stordev 217 410 10ms 26 Feb 2021 674th michelebastione 🇮🇹 217 410 11ms 21 Mar 2022 676th sergeyz7 🇬🇧 216 394 283ms 15 Nov 2020 677th brochmann 🇸🇪 215 414 10ms 9 Feb 2022 678th vaughad 215 722 110ms 21 Jan 2020 679th mazzegi 215 850 333ms 16 Apr 2020 680th n1LS 214 306 42ms 2 Oct 2019 681st Florian-Mt 213 417 10ms 28 Nov 2023 682nd Stockoh 🇫🇷 213 418 11ms 17 Oct 2024 683rd dokutan 213 781 51ms 1 Jul 2025 684th geezyx 213 859 274ms 16 Apr 2020 685th TheZwierzLF 🇵🇱 212 308 37ms 25 Dec 2025 686th biinari 212 309 38ms 25 Mar 2018 687th MaxElf999 212 419 10ms 24 May 2022 688th KatieLG 🇬🇧 212 862 292ms 29 May 2021 689th joonaspu 211 422 11ms 14 Jun 2023 690th nlc 210 311 34ms 12 Apr 2018 691st lahell 210 405 319ms 2 Jul 2020 692nd KevinMarquette 🇺🇸 209 408 301ms 7 Jun 2020 693rd markbyrne 209 425 10ms 26 Oct 2020 693rd haydenridd 209 425 10ms 26 Oct 2020 695th alphafalfa 209 647 2ms 24 Oct 2024 696th LSWdigital 208 756 14ms 17 Nov 2021 697th KatieLG 🇬🇧 207 860 293ms 20 May 2021 698th dokutan 206 709 31ms 24 Feb 2026 699th ethandhunt 204 437 10ms 21 Jul 2021 700th martinnorling 🇸🇪 203 438 10ms 20 Jun 2022 701st Ashikpaul 🇮🇳 203 478 10ms 30 Jul 2022 702nd dokutan 203 758 10ms 23 Feb 2026 703rd Waffle3z 202 323 34ms 22 Jan 2021 704th MeWhenI 🇻🇦 202 790 47ms 7 Sep 2024 705th dokutan 201 556 1,023ms 4 Feb 2025 706th CutSandstone 200 444 10ms 5 Jul 2024 707th MeWhenI 🇻🇦 198 1,250 2ms 27 Jul 2021 708th evanrittner 197 452 10ms 26 Feb 2021 709th two-bad 🇬🇧 197 492 10ms 25 Feb 2024 710th cafehaine 🇫🇷 197 621 1ms 30 Jul 2018 711th bsoyka 🇺🇸 196 453 11ms 9 Jan 2022 712th ques0942 195 457 10ms 2 Oct 2019 713th dokutan 195 913 321ms 10 Dec 2024 714th guliyevemil1 🇦🇿 194 458 10ms 16 Apr 2020 715th MeWhenI 🇻🇦 194 919 307ms 28 Mar 2022 716th te-chnical 193 461 9ms 18 Jan 2026 717th dokutan 193 611 74ms 12 Mar 2025 718th grabthefish 193 707 441ms 21 Nov 2021 719th jjstreet 192 649 523ms 30 Apr 2020 720th BBoehm 🇩🇪 189 513 11ms 4 Feb 2021 First Prev 641–720 of 896 Next Last
