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 161st MeWhenI 🇻🇦 881 129 4ms 16 Jul 2023 162nd Lydxn 🇨🇦 880 97 147ms 27 May 2023 163rd inventshah 880 122 56ms 30 Jul 2024 164th stefangimmillaro 880 143 187ms 20 Apr 2024 165th edsrzf 🇳🇿 879 101 4ms 22 Jun 2025 166th stefangimmillaro 878 94 4,085ms 13 Nov 2024 167th MeWhenI 🇻🇦 878 118 779ms 8 Mar 2023 168th SirBogman 🇺🇸 877 68 164ms 23 Jan 2024 169th hallvabo 🇳🇴 877 92 11ms 4 Sep 2022 169th plcc0 877 92 13ms 14 Jan 2026 171st emplv 🇱🇻 876 116 12ms 1 Aug 2022 171st DialFrost 🇸🇬 876 116 10ms 30 Jan 2023 173rd btnlq 872 90 11ms 20 May 2023 174th MeWhenI 🇻🇦 872 132 1,021ms 21 Jul 2022 175th lynn 868 145 177ms 8 Nov 2025 176th JayXon 🇺🇸 868 186 2,056ms 22 Apr 2024 177th sean-niemann 🇺🇸 867 100 2ms 6 Aug 2025 178th antimon2 🇯🇵 866 72 311ms 11 May 2024 179th TeodorDyakov 🇧🇬 866 128 604ms 8 Jan 2026 180th inventshah 863 91 11ms 18 May 2022 181st ovs-code 🇩🇪 863 107 96ms 15 Sep 2023 182nd jared-hughes 863 108 25ms 3 Aug 2022 183rd MeWhenI 🇻🇦 860 139 3ms 10 Sep 2022 184th m-tkach 🇺🇦 859 129 662ms 25 Sep 2025 185th edsrzf 🇳🇿 859 164 343ms 22 Jun 2025 186th emgordon154 858 94 11ms 14 Apr 2025 187th inventshah 858 101 2ms 23 Jul 2023 188th error256 857 236 1,600ms 28 Mar 2025 189th stefangimmillaro 855 86 1,540ms 24 Jul 2022 190th m-tkach 🇺🇦 854 108 25ms 13 Feb 2026 191st Argeento 🇵🇱 854 119 11ms 2 Aug 2022 192nd stefangimmillaro 853 116 470ms 1 Jul 2023 192nd namelessiw 853 116 449ms 1 Aug 2025 194th edsrzf 🇳🇿 853 130 520ms 24 Sep 2025 194th sean-niemann 🇺🇸 853 130 649ms 24 Sep 2025 194th Steffan153 🇫🇮 853 130 476ms 11 Feb 2026 197th MeWhenI 🇻🇦 852 63 2ms 3 Oct 2021 198th m-tkach 🇺🇦 852 126 57ms 2 Aug 2022 198th sean-niemann 🇺🇸 852 126 417ms 6 Aug 2025 200th Alex-x90 🇺🇸 850 102 2ms 4 May 2024 201st jacobly0 🇺🇸 850 190 2,242ms 22 Apr 2024 202nd greentruff 849 95 10ms 17 May 2025 202nd kg583 🇺🇸 849 95 10ms 3 Dec 2025 204th janlelis 848 76 33ms 22 Jul 2022 205th jared-hughes 847 120 12ms 22 Jul 2022 206th Steffan153 🇫🇮 846 82 4ms 11 Feb 2026 207th edsrzf 🇳🇿 845 101 134ms 22 Jun 2025 208th primo-ppcg 🇹🇭 845 276 10ms 2 Aug 2023 209th MeWhenI 🇻🇦 844 167 357ms 17 Apr 2023 209th Steffan153 🇫🇮 844 167 46ms 18 hours ago 211th AlephSquirrel 841 135 4ms 3 Aug 2024 212th MeWhenI 🇻🇦 840 121 13ms 30 Jan 2023 213th stefangimmillaro 837 77 35ms 25 Jul 2022 214th sean-niemann 🇺🇸 836 83 4ms 6 Aug 2025 215th sean-niemann 🇺🇸 834 91 989ms 15 Sep 2025 216th inventshah 834 125 2ms 15 Nov 2022 217th emgordon154 833 89 458ms 14 Apr 2025 217th KatieLG 🇬🇧 833 89 411ms 6 Oct 2025 219th Irratix 🇳🇱 833 122 10ms 8 Sep 2022 220th ovs-code 🇩🇪 828 101 3ms 27 Sep 2024 221st MeWhenI 🇻🇦 828 141 1,399ms 19 Jun 2023 222nd canissimia 🇦🇶 828 376 3ms 9 Apr 2024 223rd inventshah 827 123 11ms 13 Nov 2022 224th jared-hughes 826 105 2ms 31 Jan 2023 225th lifthrasiir 🇰🇷 825 300 8ms 12 Dec 2024 226th error256 824 112 74ms 10 Jul 2024 227th duckyluuk 🇳🇱 823 90 491ms 28 Aug 2024 227th kg583 🇺🇸 823 90 477ms 3 Dec 2025 229th prplz 🇦🇺 823 91 291ms 25 Oct 2022 230th SirBogman 🇺🇸 823 98 10ms 20 Nov 2022 231st primo-ppcg 🇹🇭 820 157 41ms 25 May 2025 232nd GrayJoKing 🇦🇺 817 73 119ms 22 Jan 2023 233rd MeWhenI 🇻🇦 817 121 508ms 26 Jul 2023 234th argusdusty 🇺🇸 817 154 187ms 2 Jan 2021 235th commandz0 🇺🇸 815 99 12ms 22 Aug 2023 235th anter69 🇭🇺 815 99 17ms 19 Mar 2024 237th CLOStrophobic 🇮🇹 815 107 5ms 20 Feb 2025 238th MeWhenI 🇻🇦 812 134 93ms 13 Dec 2022 239th MeWhenI 🇻🇦 811 123 215ms 21 Jul 2022 240th MeWhenI 🇻🇦 808 91 1,549ms 21 Jul 2022 First Prev 161–240 of 1,338 Next Last