The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Medal Tally 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 edsrzf 🇳🇿 744 233 10ms 21 Feb 2025 242nd adriweb 🇫🇷 743 160 31ms 19 Sep 2023 243rd Shanethegamer 🇺🇸 743 167 18ms 31 Oct 2024 244th didion0 🇺🇸 740 135 11ms 21 Jul 2023 244th ovs-code 🇩🇪 740 135 16ms 26 Nov 2024 246th inventshah 738 159 2ms 22 Jul 2024 247th anter69 🇭🇺 737 118 32ms 2 Apr 2024 248th retrohun 737 131 128ms 30 Dec 2024 249th MichalMarsalek 🇨🇿 737 186 600ms 1 Jun 2023 250th YAJUE114514 737 190 180ms 30 Jul 2025 251st snoozingnewt 🇨🇦 736 228 107ms 6 Dec 2025 252nd MeWhenI 🇻🇦 735 384 1,730ms 7 Nov 2025 253rd KatieLG 🇬🇧 734 106 319ms 28 Oct 2024 254th GrayJoKing 🇦🇺 734 162 3ms 3 Jun 2023 255th GolfingSuccess 🇬🇷 733 60 205ms 6 Jun 2023 256th GolfingSuccess 🇬🇷 732 109 15ms 19 Aug 2024 257th albanian-laundromat 732 117 1,319ms 3 Nov 2025 258th Briseglace 731 165 2,723ms 8 Apr 2025 259th annaproxy 730 192 145ms 21 Aug 2023 260th scpchicken 🇵🇼 728 98 9ms 15 Nov 2023 261st pardouin 🇫🇷 727 87 65ms 11 Aug 2025 262nd voytxt 🇨🇿 724 138 13ms 3 Jun 2023 263rd MeWhenI 🇻🇦 722 215 3ms 12 Aug 2023 264th Shanethegamer 🇺🇸 720 165 4ms 28 Jan 2024 265th SB-945 718 121 11ms 19 Apr 2024 266th pardouin 🇫🇷 715 108 1,481ms 23 Sep 2025 267th Shanethegamer 🇺🇸 715 160 11ms 7 Mar 2024 268th ovs-code 🇩🇪 714 109 743ms 25 Nov 2025 269th MeWhenI 🇻🇦 714 173 5ms 7 Jul 2023 270th Shanethegamer 🇺🇸 710 136 12ms 16 Dec 2023 271st yoshykai 709 232 416ms 9 Apr 2025 272nd Yax42 🇫🇷 708 141 11ms 20 Jan 2026 273rd annaproxy 703 177 413ms 12 Jun 2023 274th MeWhenI 🇻🇦 702 230 302ms 12 Aug 2023 275th emgordon154 702 247 15ms 18 Dec 2025 276th SirBogman 🇺🇸 700 88 34ms 8 Jun 2025 277th MeWhenI 🇻🇦 699 143 12ms 3 Jul 2023 278th leth4 699 178 404ms 21 Jun 2023 279th janAkali 🇷🇺 699 196 389ms 17 days ago 280th antimon2 🇯🇵 698 112 871ms 1 Jun 2023 281st Yax42 🇫🇷 696 123 1,177ms 16 Sep 2025 282nd Shanethegamer 🇺🇸 696 231 241ms 2 Jun 2023 283rd DialFrost 🇸🇬 691 183 102ms 17 Nov 2024 284th ovs-code 🇩🇪 690 126 31ms 2 Jun 2023 285th targrik 690 179 5ms 12 Nov 2025 286th h3ra993huskp 🇯🇵 688 239 594ms 30 Nov 2025 287th Shanethegamer 🇺🇸 687 196 98ms 14 Dec 2024 288th BambooleanLogic 🇸🇪 684 146 11ms 27 Jun 2023 289th edsrzf 🇳🇿 684 166 13ms 21 days ago 290th edsrzf 🇳🇿 682 181 5ms 10 Oct 2024 291st DialFrost 🇸🇬 681 179 468ms 10 Jul 2024 292nd tatzyr 🇯🇵 680 93 37ms 20 Jan 2025 293rd 4atj 679 128 31ms 25 Jul 2025 294th MeWhenI 🇻🇦 679 190 120ms 8 Jul 2023 295th dokutan 677 169 11ms 3 Jul 2024 296th sean-niemann 🇺🇸 677 180 497ms 23 Jul 2024 297th bizy-coder 676 115 634ms 17 Jan 2024 298th itsh01 675 148 12ms 19 Jun 2023 299th AlexanderFair 675 183 4ms 11 Aug 2023 300th snoozingnewt 🇨🇦 674 213 128ms 20 Nov 2025 301st Shanethegamer 🇺🇸 670 132 152ms 8 Jan 2025 302nd lyphyser 670 149 14ms 3 Jun 2023 302nd alexsave 670 149 11ms 25 Dec 2025 304th bzijlema 🇳🇱 669 130 29ms 25 Oct 2025 305th MeWhenI 🇻🇦 669 205 414ms 12 Aug 2023 306th tayloia 🇬🇧 666 150 10ms 2 Jun 2023 306th targrik 666 150 11ms 22 Mar 2025 308th Natanaelel 🇸🇪 665 95 38ms 28 Jan 2024 309th MeWhenI 🇻🇦 665 235 448ms 3 Sep 2023 310th nwellnhof 🇩🇪 664 131 31ms 30 Jun 2023 310th wh3n3v3r 🇨🇿 664 131 12ms 10 Nov 2024 312th MeWhenI 🇻🇦 663 334 24ms 7 Dec 2023 313th lifthrasiir 🇰🇷 662 75 3ms 30 Nov 2024 314th MeWhenI 🇻🇦 662 203 43ms 4 Sep 2024 315th Shanethegamer 🇺🇸 661 108 4ms 9 Jun 2023 316th DialFrost 🇸🇬 661 151 10ms 4 Aug 2024 317th bricknellj 659 132 11ms 26 Jun 2024 317th blaztoma 🇱🇹 659 132 31ms 8 hours ago 319th sisyphus-ppcg 🇦🇺 658 96 39ms 1 Jun 2023 319th GrayJoKing 🇦🇺 658 96 36ms 5 Jun 2023 First Prev 241–320 of 616 Next Last