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?
Medal Tally 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 161st GrayJoKing 🇦🇺 846 179 39ms 8 Jun 2023 162nd sean-niemann 🇺🇸 845 100 12ms 13 Jan 2025 163rd sean-niemann 🇺🇸 845 141 10ms 29 Jul 2024 164th DialFrost 🇸🇬 845 147 10ms 6 Mar 2024 165th Shanethegamer 🇺🇸 845 200 492ms 24 Sep 2025 166th primo-ppcg 🇹🇭 844 150 7ms 2 Jun 2023 167th Shanethegamer 🇺🇸 842 144 152ms 8 Jan 2025 168th Steffan153 🇫🇮 842 175 14ms 16 Feb 2026 169th edsrzf 🇳🇿 842 189 9ms 21 days ago 170th tailorspy 842 196 470ms 16 Jul 2024 171st m-tkach 🇺🇦 841 278 56ms 29 Jan 2024 172nd neel11235813 839 123 633ms 29 Feb 2024 173rd Artemis21 🇬🇧 839 148 12ms 2 Jan 2025 174th SirBogman 🇺🇸 836 74 3ms 4 Jun 2023 175th nwellnhof 🇩🇪 835 96 4ms 15 Jun 2023 176th MeWhenI 🇻🇦 834 145 14ms 10 Jan 2025 177th Shanethegamer 🇺🇸 834 149 168ms 24 May 2025 178th GolfingSuccess 🇬🇷 833 149 12ms 1 Jun 2023 178th KasperKivimaeki 🇫🇮 833 149 12ms 10 Jul 2025 178th Lv0Sys 🇵🇱 833 149 11ms 25 Feb 2026 181st JayXon 🇺🇸 833 164 448ms 17 Apr 2025 182nd stefangimmillaro 833 202 42ms 12 Jul 2025 183rd Steffan153 🇫🇮 832 219 48ms 40 mins ago 184th GrayJoKing 🇦🇺 831 161 109ms 6 Jun 2023 185th canissimia 🇦🇶 829 296 3ms 24 Sep 2023 185th Shanethegamer 🇺🇸 829 296 1,441ms 21 Jan 2025 187th adyache 🇺🇸 828 138 11ms 25 Jul 2023 188th KasperKivimaeki 🇫🇮 828 150 2ms 15 Nov 2025 189th Lydxn 🇨🇦 826 125 684ms 2 Feb 2024 190th Shanethegamer 🇺🇸 826 156 7ms 28 Jan 2024 191st edsrzf 🇳🇿 826 165 23ms 3 mins ago 192nd lynn 826 223 35ms 16 Jul 2023 193rd edsrzf 🇳🇿 825 173 133ms 26 Jun 2025 194th albanian-laundromat 825 203 3ms 7 Oct 2025 195th AdrienHache 🇫🇷 823 166 498ms 16 Dec 2025 196th emplv 🇱🇻 823 205 319ms 20 Jun 2023 196th stefangimmillaro 823 205 298ms 5 May 2025 198th sean-niemann 🇺🇸 822 92 2ms 12 Aug 2023 199th antimon2 🇯🇵 822 120 871ms 1 Jun 2023 200th duckyluuk 🇳🇱 822 145 11ms 6 Jan 2026 200th Lv0Sys 🇵🇱 822 145 10ms 25 Feb 2026 202nd InigoK 🇺🇸 822 151 11ms 15 Aug 2025 203rd ovs-code 🇩🇪 822 152 14ms 3 Jul 2024 204th MeWhenI 🇻🇦 820 103 1,293ms 7 Jun 2023 205th frankgraziano 819 124 47ms 21 Feb 2026 206th DialFrost 🇸🇬 819 193 3ms 26 Jan 2024 207th ovs-code 🇩🇪 817 152 2ms 10 Jul 2024 208th Shanethegamer 🇺🇸 817 155 6ms 7 Mar 2024 209th rucin93 🇵🇱 816 146 14ms 3 Jun 2023 210th sean-niemann 🇺🇸 815 194 3ms 19 Nov 2025 211th GrayJoKing 🇦🇺 815 226 32ms 4 Jun 2023 212th Shanethegamer 🇺🇸 814 76 3ms 5 Jun 2023 213th edsrzf 🇳🇿 814 224 58ms 26 mins ago 214th albanian-laundromat 812 153 11ms 11 Nov 2025 215th GrayJoKing 🇦🇺 812 154 15ms 13 Jun 2023 216th didion0 🇺🇸 811 147 11ms 21 Jul 2023 216th ovs-code 🇩🇪 811 147 16ms 26 Nov 2024 218th GrayJoKing 🇦🇺 811 155 14ms 2 Jun 2023 218th ovs-code 🇩🇪 811 155 9ms 2 Jun 2023 220th FlyingPenguin223 810 178 4ms 5 Dec 2024 221st Yewzir 🇧🇪 809 364 1,981ms 20 May 2024 222nd stefangimmillaro 807 193 129ms 12 Nov 2023 223rd kg583 🇺🇸 806 157 5ms 31 Jan 2026 224th SirBogman 🇺🇸 806 391 181ms 30 Dec 2023 225th stefangimmillaro 804 170 422ms 10 Apr 2025 226th sean-niemann 🇺🇸 804 210 655ms 24 Sep 2025 227th stefangimmillaro 804 215 279ms 12 Nov 2023 228th CLOStrophobic 🇮🇹 802 170 28ms 7 Mar 2025 229th JohandeRuiter 🇳🇱 801 155 2ms 5 Nov 2023 229th stefangimmillaro 801 155 11ms 1 Apr 2024 229th lifthrasiir 🇰🇷 801 155 31ms 12 Nov 2024 229th aksyristos 801 155 33ms 36 hours ago 233rd annaproxy 801 156 15ms 15 Jun 2023 234th saito-ta 🇯🇵 800 109 18ms 19 Jun 2023 235th m-tkach 🇺🇦 800 129 616ms 20 Jan 2024 236th Shanethegamer 🇺🇸 797 191 149ms 1 Jun 2023 237th jared-hughes 797 301 14ms 6 Jul 2024 238th duckyluuk 🇳🇱 796 152 13ms 10 Jan 2025 239th prplz 🇦🇺 796 156 12ms 4 Jun 2023 239th saito-ta 🇯🇵 796 156 2ms 8 Jun 2023 First Prev 161–240 of 619 Next Last