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 241st Lydxn 🇨🇦 806 74 110ms 7 Feb 2023 242nd inventshah 806 100 10ms 17 Nov 2022 242nd neel11235813 806 100 14ms 5 Feb 2024 244th Kacarott 🇦🇺 803 115 96ms 6 May 2024 245th andersk 🇺🇸 802 157 171ms 31 Oct 2022 246th Natanaelel 🇸🇪 801 160 148ms 22 Aug 2024 247th argusdusty 🇺🇸 801 176 338ms 2 Jan 2021 248th m-tkach 🇺🇦 798 101 11ms 25 Jul 2022 248th FortuiteMan 🇫🇷 798 101 10ms 21 Jul 2025 250th MeWhenI 🇻🇦 798 139 789ms 7 Nov 2025 251st jared-hughes 797 127 2ms 28 Jul 2022 252nd MeWhenI 🇻🇦 796 116 99ms 6 Nov 2023 253rd scpchicken 🇵🇼 796 161 144ms 22 Feb 2023 254th retrohun 793 99 14ms 2 Jan 2023 255th stefangimmillaro 791 102 10ms 18 Nov 2022 255th ndren 791 102 17ms 14 Jul 2025 257th Steffan153 🇫🇮 789 79 551ms 27 Jul 2024 258th acotis 787 160 182ms 8 Nov 2025 259th emgordon154 787 257 1,515ms 5 Feb 2025 260th edsrzf 🇳🇿 786 105 4,252ms 15 Sep 2025 261st dokutan 785 127 202ms 12 Feb 2025 262nd lifthrasiir 🇰🇷 783 103 10ms 16 Nov 2024 263rd snoozingnewt 🇨🇦 783 139 104ms 2 Dec 2025 264th Natanaelel 🇸🇪 782 130 14ms 22 Jul 2022 265th MeWhenI 🇻🇦 780 89 4ms 16 Aug 2024 266th DialFrost 🇸🇬 777 140 106ms 2 Aug 2024 267th fourth-bit 775 104 10ms 7 Jul 2024 268th dokutan 775 511 10ms 22 days ago 269th dokutan 774 95 1,623ms 12 Feb 2025 270th emplv 🇱🇻 774 182 335ms 15 Aug 2022 271st jacobly0 🇺🇸 773 131 2ms 13 Sep 2023 272nd lifthrasiir 🇰🇷 772 96 496ms 2 Dec 2024 273rd snobee 🇨🇦 772 163 186ms 12 Dec 2022 274th sean-niemann 🇺🇸 771 107 4,057ms 24 Oct 2024 275th dokutan 768 105 17ms 21 Feb 2026 276th error256 768 108 103ms 10 Jul 2024 277th Alex-x90 🇺🇸 767 140 3,211ms 4 May 2024 278th anter69 🇭🇺 766 96 1,508ms 12 days ago 279th inventshah 766 156 2ms 15 Nov 2022 280th rucin93 🇵🇱 762 110 187ms 31 Oct 2024 281st stefangimmillaro 762 112 141ms 28 Oct 2022 282nd lynn 761 106 11ms 23 Jul 2022 282nd b10011 🇫🇮 761 106 11ms 7 Jan 2023 282nd Artemis21 🇬🇧 761 106 17ms 10 Jan 2025 282nd snoozingnewt 🇨🇦 761 106 13ms 2 Dec 2025 286th Lydxn 🇨🇦 759 146 740ms 12 Dec 2022 287th sisyphus-ppcg 🇦🇺 755 104 13ms 18 May 2022 288th ryyyn 🇺🇸 754 107 10ms 25 Jun 2025 289th FlyingPenguin223 750 135 2ms 21 Nov 2024 290th neel11235813 749 99 511ms 1 Apr 2024 291st ovs-code 🇩🇪 749 112 172ms 17 Apr 2025 292nd SirBogman 🇺🇸 749 172 41ms 23 Jul 2022 293rd MeWhenI 🇻🇦 747 216 1,921ms 7 Nov 2025 294th btjones0 740 109 12ms 4 Dec 2021 295th Steffan153 🇫🇮 736 81 128ms 28 Jul 2024 296th ovs-code 🇩🇪 734 101 519ms 31 Jul 2024 297th bricknellj 733 110 10ms 17 Nov 2022 298th c0d3-4-F00d 🇩🇪 729 119 2ms 18 Mar 2022 299th snoozingnewt 🇨🇦 727 102 455ms 2 Dec 2025 300th TFeld00 🇩🇰 727 111 11ms 3 Oct 2022 300th sisyphus-ppcg 🇦🇺 727 111 9ms 17 Nov 2022 300th 4atj 727 111 13ms 30 Jun 2025 303rd dokutan 723 140 2ms 14 Dec 2025 304th AdrienHache 🇫🇷 722 137 468ms 9 Aug 2025 305th adyache 🇺🇸 721 169 6ms 30 Jul 2023 306th MeWhenI 🇻🇦 720 104 259ms 28 Jan 2023 307th kg583 🇺🇸 717 156 45ms 1 Dec 2025 308th anter69 🇭🇺 716 90 37ms 12 days ago 309th emgordon154 716 142 10ms 24 Jun 2024 310th dokutan 713 104 395ms 21 Feb 2026 311th lynn 709 130 30ms 17 Jul 2023 312th dokutan 708 91 36ms 12 Feb 2025 313th SirBogman 🇺🇸 707 106 262ms 5 Jan 2024 314th jared-hughes 707 114 12ms 22 Jul 2022 314th GrayJoKing 🇦🇺 707 114 17ms 11 Jul 2024 316th coltraloz 🇪🇸 706 157 592ms 3 Apr 2025 317th MeWhenI 🇻🇦 704 183 40ms 17 May 2023 318th kg583 🇺🇸 703 124 5ms 1 Dec 2025 319th MeWhenI 🇻🇦 703 136 497ms 21 Jul 2022 320th dokutan 702 108 1,041ms 21 Feb 2026 First Prev 241–320 of 1,338 Next Last