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 159th stefangimmillaro 860 154 19ms 27 Sep 2024 159th Mabeloid 🇳🇴 860 154 12ms 6 Oct 2024 159th albanian-laundromat 860 154 12ms 22 May 2025 159th InigoK 🇺🇸 860 154 12ms 10 Oct 2025 165th GrayJoKing 🇦🇺 860 166 39ms 27 Feb 2024 166th SirBogman 🇺🇸 859 116 381ms 18 May 2024 167th Shanethegamer 🇺🇸 859 117 1,357ms 4 Jul 2022 168th Shanethegamer 🇺🇸 859 135 582ms 26 Mar 2024 168th sean-niemann 🇺🇸 859 135 526ms 27 Jul 2024 170th GrayJoKing 🇦🇺 858 183 378ms 11 Jun 2023 171st Shanethegamer 🇺🇸 858 230 3ms 28 Feb 2023 172nd JayXon 🇺🇸 857 146 2ms 3 May 2023 173rd shelerr 855 155 18ms 22 Aug 2025 173rd plcc0 855 155 12ms 7 Nov 2025 175th SirBogman 🇺🇸 855 172 44ms 30 Nov 2023 176th MeWhenI 🇻🇦 855 199 496ms 7 Nov 2025 177th Shanethegamer 🇺🇸 854 144 2ms 28 Jan 2023 178th Shanethegamer 🇺🇸 852 146 161ms 24 May 2025 179th Shanethegamer 🇺🇸 851 113 35ms 26 Feb 2023 180th jared-hughes 851 141 12ms 19 Jan 2023 181st kg583 🇺🇸 851 214 42ms 8 Jul 2025 182nd annaproxy 849 156 18ms 15 Aug 2022 182nd qpwoeirut 849 156 12ms 23 Nov 2025 184th edsrzf 🇳🇿 849 166 9ms 18 days ago 185th lynn 847 137 458ms 17 Feb 2024 186th Shanethegamer 🇺🇸 846 148 2ms 6 Jul 2022 187th Shanethegamer 🇺🇸 846 197 285ms 14 Jul 2023 188th SirBogman 🇺🇸 845 90 35ms 13 Jun 2022 189th prplz 🇦🇺 845 142 13ms 27 Dec 2023 190th Shanethegamer 🇺🇸 845 175 1,423ms 26 Oct 2023 191st stefangimmillaro 845 222 185ms 4 Jun 2025 192nd jared-hughes 844 157 11ms 10 Jun 2022 192nd KatieLG 🇬🇧 844 157 18ms 19 Apr 2025 194th JayXon 🇺🇸 844 252 1,779ms 22 Apr 2024 195th Natanaelel 🇸🇪 843 114 36ms 11 Jun 2022 195th MeWhenI 🇻🇦 843 114 36ms 7 Dec 2022 197th stefangimmillaro 841 198 292ms 26 Sep 2024 197th edsrzf 🇳🇿 841 198 293ms 26 Sep 2025 199th Shanethegamer 🇺🇸 841 202 125ms 15 Jun 2022 200th Lydxn 🇨🇦 840 149 2ms 14 Jul 2022 200th inventshah 840 149 2ms 30 Jan 2024 202nd emgordon154 840 253 1,628ms 23 Dec 2025 203rd uttumuttu 🇫🇮 839 143 12ms 23 Feb 2024 203rd emgordon154 839 143 2,841ms 12 Jul 2025 205th davecame 839 158 12ms 5 Dec 2023 205th Bulmenisaurus 839 158 19ms 29 Jul 2024 207th primo-ppcg 🇹🇭 838 166 6ms 6 Aug 2023 208th dvargas46 🇺🇸 836 144 273ms 4 Mar 2023 209th nwellnhof 🇩🇪 836 170 437ms 12 Jun 2022 209th JayXon 🇺🇸 836 170 445ms 7 Dec 2023 209th inventshah 836 170 432ms 30 Jan 2024 212th Steffan153 🇫🇮 836 181 33ms 15 Feb 2026 213th m-tkach 🇺🇦 835 139 504ms 19 Mar 2024 214th NewDefectus 🇮🇱 833 144 13ms 10 Jun 2022 214th Argeento 🇵🇱 833 144 13ms 27 Aug 2023 216th Shanethegamer 🇺🇸 833 145 1,026ms 12 Dec 2022 217th GolfingSuccess 🇬🇷 833 159 13ms 9 Jun 2022 217th CornerMercury 🇬🇧 833 159 12ms 2 Nov 2025 219th sean-niemann 🇺🇸 833 200 302ms 10 Jul 2025 220th albanian-laundromat 832 235 56ms 16 days ago 221st canissimia 🇦🇶 831 274 5ms 29 Nov 2023 222nd lifthrasiir 🇰🇷 831 276 31ms 19 Dec 2024 223rd dcgjb 830 120 322ms 23 Jan 2024 224th duckyluuk 🇳🇱 830 219 15ms 12 Nov 2025 225th SirBogman 🇺🇸 829 116 35ms 10 Jun 2022 226th bizy-coder 829 140 485ms 16 Jan 2024 226th MeWhenI 🇻🇦 829 140 464ms 24 May 2024 226th albanian-laundromat 829 140 469ms 18 Aug 2025 226th duckyluuk 🇳🇱 829 140 446ms 8 Dec 2025 230th nwellnhof 🇩🇪 829 171 474ms 28 Jun 2023 231st primo-ppcg 🇹🇭 829 381 15ms 6 Aug 2025 232nd Shanethegamer 🇺🇸 828 236 64ms 6 Jul 2022 233rd tayloia 🇬🇧 827 145 12ms 18 May 2023 234th Kacarott 🇦🇺 824 158 70ms 7 May 2024 235th Shanethegamer 🇺🇸 823 184 35ms 27 Feb 2023 236th emgordon154 822 354 1,443ms 9 Jul 2025 237th rucin93 🇵🇱 820 150 155ms 3 Aug 2024 238th emgordon154 819 172 9ms 22 days ago 239th Shanethegamer 🇺🇸 818 108 537ms 2 May 2023 240th Alex-x90 🇺🇸 818 153 2ms 30 May 2024 First Prev 161–240 of 670 Next Last