The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Zodiac Signs in all languages in bytes. 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 Bytes Time Submitted 240th sean-niemann 🇺🇸 818 153 2ms 25 Jul 2025 242nd Irratix 🇳🇱 818 162 18ms 2 Jul 2022 242nd Artemis21 🇬🇧 818 162 12ms 2 Jan 2025 244th Shanethegamer 🇺🇸 818 170 160ms 29 Nov 2022 245th sean-niemann 🇺🇸 818 172 463ms 25 Jul 2025 246th GrayJoKing 🇦🇺 818 185 33ms 2 Mar 2023 247th SirBogman 🇺🇸 817 142 447ms 16 Jan 2024 248th MeWhenI 🇻🇦 817 159 11ms 28 May 2023 249th MeWhenI 🇻🇦 817 204 308ms 17 Apr 2023 250th MeWhenI 🇻🇦 817 208 132ms 24 Feb 2023 251st SirBogman 🇺🇸 816 147 13ms 16 Jun 2022 251st trinityy-7 816 147 11ms 15 Mar 2024 253rd tomtheisen 🇺🇸 815 174 417ms 3 Feb 2023 253rd AdrienHache 🇫🇷 815 174 415ms 23 Jul 2025 255th MeWhenI 🇻🇦 815 223 22ms 30 Dec 2024 256th MeWhenI 🇻🇦 815 242 3ms 10 Sep 2022 257th nwellnhof 🇩🇪 814 208 77ms 23 Apr 2023 258th FlorianCassayre 🇫🇷 813 163 11ms 24 Nov 2022 259th rucin93 🇵🇱 810 145 4ms 26 Jul 2025 260th Shanethegamer 🇺🇸 809 172 7ms 6 Aug 2023 261st olleicua 🇺🇸 808 119 39ms 7 Nov 2025 261st anter69 🇭🇺 808 119 34ms 15 days ago 263rd Shanethegamer 🇺🇸 807 176 434ms 6 Jul 2022 264th MeWhenI 🇻🇦 807 177 42ms 6 Sep 2022 265th kg583 🇺🇸 807 241 82ms 14 days ago 266th snoozingnewt 🇨🇦 806 144 492ms 17 Feb 2026 267th roavin 806 176 368ms 22 Jun 2022 268th voytxt 🇨🇿 805 149 14ms 3 Jun 2023 268th emgordon154 805 149 15ms 8 Jul 2025 270th Steffan153 🇫🇮 804 168 130ms 9 Feb 2023 271st antimon2 🇯🇵 803 110 512ms 19 Jan 2026 272nd MeWhenI 🇻🇦 803 155 153ms 37 hours ago 273rd jared-hughes 802 156 2ms 4 Jan 2023 274th MeWhenI 🇻🇦 800 150 12ms 3 Aug 2024 275th GrayJoKing 🇦🇺 799 163 65ms 16 Oct 2023 276th stefangimmillaro 799 169 111ms 23 Oct 2022 277th MichalMarsalek 🇨🇿 798 166 11ms 14 Jan 2023 277th madex 🇩🇪 798 166 12ms 11 days ago 279th sean-niemann 🇺🇸 798 178 456ms 25 Jul 2025 280th Shanethegamer 🇺🇸 798 179 39ms 6 Sep 2022 281st AlephSquirrel 797 69 75ms 11 Feb 2023 281st Steffan153 🇫🇮 797 69 89ms 19 Mar 2023 283rd MeWhenI 🇻🇦 797 126 1,290ms 12 May 2023 284th albanian-laundromat 797 136 972ms 17 Oct 2025 285th AlephSquirrel 795 146 573ms 21 Jan 2024 286th CatsAreFluffy 794 100 50ms 24 Feb 2023 287th jared-hughes 794 179 442ms 17 Jul 2022 288th Natanaelel 🇸🇪 793 167 12ms 11 Jun 2022 288th martinnorling 🇸🇪 793 167 11ms 16 Jun 2022 288th croc54 793 167 13ms 7 Jan 2025 291st m-tkach 🇺🇦 792 158 2ms 12 Jun 2022 292nd revlayle 🇺🇸 792 179 446ms 20 Jun 2022 292nd MeWhenI 🇻🇦 792 179 409ms 16 Nov 2022 294th anter69 🇭🇺 791 127 1,415ms 15 days ago 295th albanian-laundromat 790 176 137ms 16 days ago 296th emgordon154 788 156 161ms 8 Jul 2025 297th acotis 788 238 261ms 5 Jun 2025 298th MeWhenI 🇻🇦 785 172 115ms 23 Oct 2022 299th twocatsinatrenchcoat 784 169 12ms 15 Jun 2022 300th stefangimmillaro 783 181 408ms 10 Apr 2025 301st Shanethegamer 🇺🇸 783 197 164ms 24 Feb 2023 302nd inventshah 783 252 3ms 11 Sep 2022 303rd Shanethegamer 🇺🇸 782 180 499ms 23 Mar 2023 304th albanian-laundromat 782 213 260ms 16 days ago 305th edsrzf 🇳🇿 782 233 41ms 14 Feb 2025 306th sean-niemann 🇺🇸 780 183 45ms 21 Apr 2023 307th Shanethegamer 🇺🇸 779 182 429ms 26 Feb 2023 307th sultan 779 182 409ms 9 Apr 2024 307th namelessiw 779 182 431ms 9 Jul 2024 310th SirBogman 🇺🇸 778 406 16ms 12 Jun 2022 311th m-tkach 🇺🇦 776 183 447ms 12 Jun 2022 312th Shanethegamer 🇺🇸 775 71 79ms 26 Jul 2022 313th Steffan153 🇫🇮 775 114 474ms 23 May 2024 314th inventshah 775 171 19ms 17 Nov 2022 314th fgrosshans 🇫🇷 775 171 12ms 12 Jul 2024 314th StefanHabel 🇨🇦 775 171 12ms 20 days ago 317th stefangimmillaro 774 155 11ms 26 Sep 2024 317th Lv0Sys 🇵🇱 774 155 11ms 26 Feb 2026 319th Shanethegamer 🇺🇸 772 83 4ms 7 Jul 2022 320th MichaelMBradley 🇨🇦 770 172 12ms 11 Jun 2022 First Prev 241–320 of 670 Next Last