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?
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 CaedenHarper 🇨🇦 366 207 1,277ms 2 Oct 2025 802nd Vaekor 365 221 10ms 26 Feb 2024 803rd janbehrens 🇩🇪 364 200 4ms 10 Jul 2023 804th gurglemurgle5 364 279 11ms 13 Jul 2022 805th dsntzn 🇸🇰 363 280 11ms 13 Dec 2020 805th lowlighter 363 280 12ms 12 Mar 2021 807th stordev 362 223 16ms 26 Feb 2021 807th face0xff 362 223 20ms 20 Oct 2021 807th Bodo171 362 223 18ms 8 Dec 2022 810th johnburton0517 361 282 12ms 14 Jul 2023 811th nephila-nacrea 🇬🇧 360 202 3ms 10 Dec 2020 812th eli-siegel 360 392 369ms 23 Jun 2023 813th KatieLG 🇬🇧 359 303 87ms 21 Jan 2023 814th MarcMush 🇫🇷 358 174 336ms 12 Jan 2024 815th djeedjay 🇳🇱 358 242 2ms 23 Dec 2020 816th zbreit 🇺🇸 357 226 10ms 20 Aug 2021 816th CutSandstone 357 226 10ms 4 Jul 2024 818th madex 🇩🇪 357 353 182ms 16 Aug 2025 819th SmartK8 🇨🇿 356 278 445ms 31 Oct 2022 820th arcage 🇯🇵 355 207 1,533ms 30 Apr 2021 821st HenryTy83 355 286 11ms 5 May 2023 821st Maznek 355 286 11ms 2 Jul 2023 821st madeforlosers 355 286 10ms 7 Nov 2023 821st Florian-Mt 355 286 13ms 14 Nov 2023 821st nsprd 355 286 12ms 18 Jan 2024 821st wh3n3v3r 🇨🇿 355 286 11ms 12 Nov 2024 821st gigaprofisi 🇺🇸 355 286 10ms 20 Jun 2025 821st CaedenHarper 🇨🇦 355 286 13ms 21 Aug 2025 821st olleicua 🇺🇸 355 286 11ms 11 Sep 2025 830th JGDoerrer 355 355 171ms 29 Jan 2022 831st rschwa6308 🇺🇸 354 228 9ms 8 Nov 2021 832nd antonymontana 354 287 10ms 7 Dec 2020 832nd johanrosenson 354 287 13ms 8 Dec 2021 832nd mackereldev 354 287 12ms 28 Apr 2022 832nd ollyspooner 354 287 11ms 25 Nov 2022 832nd FrederikHutfless 🇩🇪 354 287 12ms 22 Dec 2022 837th Betuaredead 354 303 532ms 16 Jan 2023 838th dillon-duncando 354 307 107ms 24 Mar 2024 839th msbranicky 353 234 3,998ms 11 Jan 2025 840th JRaspass 🇬🇧 353 235 98ms 19 May 2022 841st BBoehm 🇩🇪 353 288 11ms 28 Jan 2021 842nd 4hg 🇺🇸 352 183 36ms 11 Dec 2022 843rd bbb651 🇮🇱 352 289 10ms 25 Nov 2020 843rd tetrogem 352 289 13ms 8 Sep 2021 843rd zaneshaw 352 289 12ms 28 Apr 2022 846th zugch 351 290 12ms 7 Oct 2024 847th dokutan 350 224 2ms 5 Mar 2024 848th TornadoCookie 350 289 2ms 4 May 2023 849th KatieLG 🇬🇧 350 403 326ms 29 Mar 2024 850th SirFireball3521 349 171 136ms 1 Mar 2023 851st trist224 🇫🇷 349 231 31ms 29 Sep 2022 851st jtaxen 349 231 13ms 14 May 2024 853rd DaCuteRaccoon 349 291 11ms 21 Apr 2022 853rd 1231234md5 🇨🇳 349 291 10ms 15 Dec 2023 853rd hacker112 🇸🇪 349 291 11ms 23 Jun 2024 853rd MrMullac 349 291 13ms 23 Mar 2025 853rd andrewl64 349 291 11ms 25 Sep 2025 853rd Cube14yt 349 291 11ms 19 Nov 2025 853rd Roachbones 349 291 13ms 16 Jan 2026 860th msbranicky 349 361 232ms 14 Oct 2023 861st doge1338 348 292 10ms 14 Dec 2020 861st Thonoton 348 292 12ms 9 Mar 2023 861st CristhoferT29 348 292 12ms 6 Jul 2024 861st 4very 348 292 13ms 7 Jun 2025 865th 1337-man 347 269 5ms 25 Jan 2022 866th aliakseikalosha 347 285 417ms 21 Nov 2021 867th ndren 347 287 2ms 9 Oct 2023 867th Yewzir 🇧🇪 347 287 2ms 13 Jan 2024 869th AshyIsMe 🇦🇺 346 194 35ms 27 Jul 2022 870th con-cs 346 294 13ms 15 Oct 2021 870th sech1p 🇵🇱 346 294 15ms 31 Oct 2021 870th GulgDev 346 294 11ms 14 Nov 2023 873rd JRaspass 🇬🇧 345 173 116ms 9 May 2021 874th ellis-rix 345 234 17ms 21 Dec 2022 875th IchBinMichMarkus 345 295 11ms 4 Jul 2024 876th JC-ProgJava 345 321 592ms 8 Jan 2022 877th ian-h-chamberlain 🇺🇸 344 366 164ms 14 Aug 2022 878th razetime 343 154 4ms 18 Oct 2022 879th firegene 🇮🇪 343 235 20ms 6 Dec 2021 880th ryanlanegit 342 219 280ms 19 Jun 2022 First Prev 801–880 of 1,339 Next Last
