The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Emojify 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 801st janbehrens 🇩🇪 364 200 4ms 10 Jul 2023 802nd gurglemurgle5 364 279 12ms 13 Jul 2022 803rd dsntzn 🇸🇰 363 280 12ms 13 Dec 2020 803rd lowlighter 363 280 11ms 12 Mar 2021 805th stordev 362 223 16ms 26 Feb 2021 805th face0xff 362 223 20ms 20 Oct 2021 805th Bodo171 362 223 18ms 8 Dec 2022 808th johnburton0517 361 282 10ms 14 Jul 2023 809th nephila-nacrea 🇬🇧 360 202 3ms 10 Dec 2020 810th eli-siegel 360 392 369ms 23 Jun 2023 811th KatieLG 🇬🇧 359 303 87ms 21 Jan 2023 812th MarcMush 🇫🇷 358 174 336ms 12 Jan 2024 813th djeedjay 🇳🇱 358 242 2ms 23 Dec 2020 814th zbreit 🇺🇸 357 226 10ms 20 Aug 2021 814th CutSandstone 357 226 10ms 4 Jul 2024 816th madex 🇩🇪 357 353 182ms 16 Aug 2025 817th SmartK8 🇨🇿 356 278 445ms 31 Oct 2022 818th arcage 🇯🇵 355 207 1,533ms 30 Apr 2021 819th HenryTy83 355 286 12ms 5 May 2023 819th Maznek 355 286 13ms 2 Jul 2023 819th madeforlosers 355 286 11ms 7 Nov 2023 819th Florian-Mt 355 286 10ms 14 Nov 2023 819th nsprd 355 286 12ms 18 Jan 2024 819th wh3n3v3r 🇨🇿 355 286 12ms 12 Nov 2024 819th gigaprofisi 🇺🇸 355 286 11ms 20 Jun 2025 819th CaedenHarper 🇨🇦 355 286 10ms 21 Aug 2025 819th olleicua 🇺🇸 355 286 10ms 11 Sep 2025 828th JGDoerrer 355 355 171ms 29 Jan 2022 829th rschwa6308 🇺🇸 354 228 9ms 8 Nov 2021 830th antonymontana 354 287 11ms 7 Dec 2020 830th johanrosenson 354 287 12ms 8 Dec 2021 830th mackereldev 354 287 11ms 28 Apr 2022 830th ollyspooner 354 287 12ms 25 Nov 2022 830th FrederikHutfless 🇩🇪 354 287 11ms 22 Dec 2022 835th Betuaredead 354 303 482ms 16 Jan 2023 836th dillon-duncando 354 307 107ms 24 Mar 2024 837th msbranicky 353 234 3,998ms 11 Jan 2025 838th JRaspass 🇬🇧 353 235 98ms 19 May 2022 839th BBoehm 🇩🇪 353 288 12ms 28 Jan 2021 840th 4hg 🇺🇸 352 183 36ms 11 Dec 2022 841st KatieLG 🇬🇧 352 260 4ms 23 Mar 2024 842nd bbb651 🇮🇱 352 289 10ms 25 Nov 2020 842nd tetrogem 352 289 12ms 8 Sep 2021 842nd zaneshaw 352 289 15ms 28 Apr 2022 845th zugch 351 290 11ms 7 Oct 2024 846th dokutan 350 224 2ms 5 Mar 2024 847th TornadoCookie 350 289 2ms 4 May 2023 848th KatieLG 🇬🇧 350 403 326ms 29 Mar 2024 849th SirFireball3521 349 171 136ms 1 Mar 2023 850th trist224 🇫🇷 349 231 31ms 29 Sep 2022 850th jtaxen 349 231 13ms 14 May 2024 852nd DaCuteRaccoon 349 291 12ms 21 Apr 2022 852nd 1231234md5 🇨🇳 349 291 10ms 15 Dec 2023 852nd hacker112 🇸🇪 349 291 10ms 23 Jun 2024 852nd MrMullac 349 291 15ms 23 Mar 2025 852nd andrewl64 349 291 11ms 25 Sep 2025 852nd Cube14yt 349 291 11ms 19 Nov 2025 852nd Roachbones 349 291 11ms 16 Jan 2026 859th msbranicky 349 361 232ms 14 Oct 2023 860th doge1338 348 292 14ms 14 Dec 2020 860th Thonoton 348 292 12ms 9 Mar 2023 860th CristhoferT29 348 292 9ms 6 Jul 2024 860th 4very 348 292 12ms 7 Jun 2025 864th 1337-man 347 269 5ms 25 Jan 2022 865th aliakseikalosha 347 285 417ms 21 Nov 2021 866th ndren 347 287 2ms 9 Oct 2023 866th Yewzir 🇧🇪 347 287 2ms 13 Jan 2024 868th AshyIsMe 🇦🇺 346 194 35ms 27 Jul 2022 869th con-cs 346 294 10ms 15 Oct 2021 869th sech1p 🇵🇱 346 294 11ms 31 Oct 2021 869th GulgDev 346 294 10ms 14 Nov 2023 872nd JRaspass 🇬🇧 345 173 116ms 9 May 2021 873rd ellis-rix 345 234 17ms 21 Dec 2022 874th IchBinMichMarkus 345 295 11ms 4 Jul 2024 875th JC-ProgJava 345 321 592ms 8 Jan 2022 876th ian-h-chamberlain 🇺🇸 344 366 164ms 14 Aug 2022 877th razetime 343 154 4ms 18 Oct 2022 878th firegene 🇮🇪 343 235 20ms 6 Dec 2021 879th ryanlanegit 342 219 280ms 19 Jun 2022 879th KatieLG 🇬🇧 342 219 264ms 15 Sep 2022 First Prev 801–880 of 1,337 Next Last
