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 639th andrewjc2000 441 183 11ms 21 May 2025 642nd mosho-p 438 184 10ms 13 Oct 2022 643rd PaulMWeiser 436 185 10ms 1 Mar 2023 644th HassanAliKadhem 🇧🇭 436 323 375ms 13 Aug 2023 645th vishwathg 434 186 10ms 20 Aug 2022 645th FlorianCassayre 🇫🇷 434 186 20ms 29 Oct 2022 647th fitzdotlol 🇺🇸 434 234 12ms 20 Mar 2022 648th CaedenHarper 🇨🇦 433 256 785ms 3 Oct 2025 649th BREMAUCY 🇫🇷 432 149 40ms 16 Apr 2024 650th JRaspass 🇬🇧 431 194 3ms 25 Sep 2022 650th dokutan 431 194 3ms 27 Dec 2025 652nd yzhs 🇩🇪 430 150 45ms 20 Jul 2022 653rd bidger 430 193 104ms 5 Mar 2023 654th kistlerf 🇨🇭 429 188 18ms 14 May 2025 654th vgamula 🇺🇦 429 188 10ms 5 Aug 2025 654th orsinium 429 188 10ms 14 Aug 2025 657th arcpolaris 428 231 539ms 13 Jan 2026 658th ozzypossie 427 189 11ms 25 May 2023 659th sophuric 427 238 14ms 18 Oct 2021 660th CaedenHarper 🇨🇦 426 232 423ms 16 Oct 2025 661st Isaac-NTT 425 239 12ms 17 Jul 2023 662nd aalec 424 190 17ms 25 Apr 2024 663rd mtirado1 424 239 2ms 24 Dec 2022 664th Chinay-Domitrix 🇺🇸 423 195 4,090ms 11 days ago 665th MeWhenI 🇻🇦 423 478 1,529ms 10 Feb 2025 666th MeWhenI 🇻🇦 423 586 9ms 28 Nov 2023 667th dokutan 422 127 2ms 24 Mar 2025 668th boxjelly 422 191 18ms 12 Feb 2021 668th Deedogg 422 191 10ms 19 Nov 2024 670th veiko 422 241 12ms 28 Jun 2022 671st dokutan 421 199 142ms 15 Jun 2025 672nd tomh1012 421 235 536ms 7 Nov 2025 673rd boxjelly 421 299 212ms 23 Feb 2021 673rd connorslade 421 299 267ms 13 May 2022 675th Mabeloid 🇳🇴 420 192 14ms 17 Sep 2024 676th bakkeby 420 199 3ms 28 Sep 2022 677th Rhinozz 🇨🇦 420 242 12ms 22 Aug 2021 678th tdkkdt 🇷🇺 419 236 482ms 21 Nov 2021 678th KatieLG 🇬🇧 419 236 415ms 21 Oct 2022 680th 77Tigers 418 193 19ms 25 Feb 2021 680th Miles-1000 🇬🇧 418 193 17ms 25 Feb 2021 680th Bonjour27891 🇻🇳 418 193 17ms 7 Aug 2022 680th wa1ker38552 418 193 16ms 22 May 2023 680th gabe-gallegos 418 193 18ms 2 May 2024 680th BREMAUCY 🇫🇷 418 193 17ms 4 May 2024 686th dokutan 417 198 3,923ms 7 Jun 2025 687th eldritchconundrum 417 237 479ms 21 Nov 2021 688th urojony 🇵🇱 416 194 10ms 25 May 2021 688th CommandLeo 🇮🇹 416 194 10ms 28 Nov 2025 688th robbertvz 416 194 11ms 29 Dec 2025 688th denkyuu1 416 194 10ms 8 Feb 2026 692nd Adix-null 🇱🇹 416 238 544ms 7 Jul 2023 693rd msbranicky 416 287 3ms 10 Aug 2023 694th dokutan 416 486 1,626ms 12 Jan 2025 695th juliansiebert 🇩🇪 414 181 360ms 30 Jul 2022 696th Y0UR-U5ERNAME 414 195 9ms 3 Sep 2021 697th Andriamanitra 🇫🇮 411 179 1,491ms 9 Apr 2022 698th targrik 411 194 6ms 27 Jan 2025 699th wrhm 411 196 17ms 15 Dec 2020 699th SniperSmiley 🇺🇸 411 196 17ms 30 Jun 2022 699th cardosoo 411 196 17ms 6 Oct 2024 702nd dokutan 411 568 10ms 24 Dec 2024 703rd JRaspass 🇬🇧 409 178 3ms 25 Nov 2020 703rd scpchicken 🇵🇼 409 178 3ms 17 Dec 2022 705th ADV1K 🇮🇳 409 197 17ms 25 Oct 2021 705th jfallon1997 409 197 11ms 5 Jan 2023 705th rollershutter 409 197 10ms 25 Nov 2023 708th jaredcrystal 🇺🇸 408 158 35ms 14 Dec 2020 709th Vaekor 408 249 13ms 26 Feb 2024 710th solmyr2000 407 264 557ms 27 Jul 2022 711th TheEric0802 🇩🇪 406 206 3ms 15 Jul 2024 712th JRaspass 🇬🇧 406 347 335ms 1 Jun 2022 713th MeWhenI 🇻🇦 405 194 2ms 13 May 2022 714th msbranicky 405 199 10ms 16 Jul 2023 714th jacekwladzinski 405 199 10ms 5 Oct 2025 716th erwoba 🇩🇪 404 180 3ms 7 Dec 2020 717th msbranicky 404 246 2ms 12 Oct 2023 718th shu-bc 404 349 371ms 26 Oct 2022 719th Andriamanitra 🇫🇮 402 155 400ms 21 Jul 2022 720th markusgraube 401 201 23ms 8 Apr 2024 First Prev 641–720 of 1,339 Next Last
