The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
ASCII Table 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 881st ArmaanAS 627 156 10ms 25 Dec 2022 881st tetrogem 627 156 9ms 26 Jun 2025 883rd AnAwesomGuy 626 155 2,567ms 21 Dec 2025 884th Yewzir 🇧🇪 625 156 1ms 11 Feb 2023 885th rollershutter 624 178 1ms 4 Jul 2024 886th fitzdotlol 🇺🇸 623 157 9ms 28 Mar 2022 886th Salutations45 623 157 9ms 25 Nov 2024 888th blaztoma 🇱🇹 623 183 6ms 26 days ago 889th Domicnt 623 190 62ms 4 Jan 2023 890th primo-ppcg 🇹🇭 622 82 3ms 22 May 2022 891st HassanAliKadhem 🇧🇭 622 228 361ms 3 Aug 2023 892nd scpchicken 🇵🇼 621 99 35ms 1 Apr 2022 892nd jared-hughes 621 99 34ms 12 Sep 2022 894th vishwathg 621 109 10ms 17 Aug 2022 894th LogicalJoe 621 109 10ms 5 Oct 2022 896th gastropner 621 157 1ms 5 Jul 2025 897th rgthree 619 158 10ms 6 Sep 2023 898th michelebastione 🇮🇹 619 194 439ms 26 Dec 2025 899th primo-ppcg 🇹🇭 618 88 146ms 5 Dec 2022 900th snoozingnewt 🇨🇦 618 130 1,791ms 2 Nov 2025 901st asterized 618 215 145ms 28 Nov 2023 902nd KerelOlivier 617 158 2ms 5 May 2022 902nd aksyristos 617 158 1ms 28 Feb 2023 902nd kyleclaassen 617 158 1ms 28 May 2023 902nd xnacly 🇩🇪 617 158 1ms 3 Jul 2023 902nd tlucanti 🇷🇺 617 158 1ms 8 Jan 2024 902nd matricronia 617 158 2ms 1 Feb 2026 908th frankgraziano 616 110 10ms 14 Mar 2025 908th YAJUE114514 616 110 10ms 10 Dec 2025 910th ChrisTheisen 616 195 407ms 13 Dec 2022 911th mikiymk 615 100 33ms 21 Sep 2023 911th KatieLG 🇬🇧 615 100 39ms 2 Oct 2025 911th D-MOVE 🇵🇭 615 100 36ms 5 Dec 2025 914th GolfingSuccess 🇬🇷 615 140 4ms 17 Aug 2024 915th Mabeloid 🇳🇴 615 159 10ms 26 Oct 2024 916th MeWhenI 🇻🇦 615 160 66ms 5 Apr 2025 917th Z-snails 614 182 120ms 1 Mar 2023 918th Natanaelel 🇸🇪 613 148 2ms 12 Apr 2022 919th CaedenHarper 🇨🇦 612 106 478ms 19 Sep 2024 920th Pimentero 🇷🇺 611 144 5ms 26 Nov 2022 921st medzes 611 160 11ms 24 Jul 2023 921st Davr1 🇨🇿 611 160 11ms 15 Oct 2023 921st tomh1012 611 160 10ms 17 days ago 924th branchmispredictor 610 111 11ms 14 Mar 2025 925th aubergine-sauce 610 160 1ms 21 May 2023 925th elttil 610 160 1ms 18 Nov 2025 927th lifthrasiir 🇰🇷 609 187 6ms 12 Dec 2024 928th DialFrost 🇸🇬 607 61 2ms 27 Feb 2024 929th Shanethegamer 🇺🇸 607 142 3ms 16 Aug 2024 930th Maznek 607 161 12ms 11 Jun 2023 930th trinityy-7 607 161 10ms 5 Oct 2023 930th daniel-michel 607 161 10ms 7 Dec 2024 933rd astdefu 606 161 1ms 10 Dec 2022 933rd Jonatan6 🇩🇰 606 161 1ms 9 Jun 2023 933rd violeta-desantis 606 161 1ms 14 Feb 2024 936th Emutis 🇱🇹 605 112 10ms 5 Nov 2025 937th denkyuu1 605 118 501ms 4 days ago 938th scpchicken 🇵🇼 604 90 129ms 26 Mar 2022 939th DialFrost 🇸🇬 604 162 9ms 24 Oct 2023 940th leon27979 604 177 5ms 3 Jan 2025 941st emgordon154 603 102 41ms 18 Nov 2024 942nd xbxbxb007 602 162 1ms 10 Jan 2024 943rd frnco 601 137 80ms 6 Jun 2022 944th Innf107 601 186 120ms 12 Nov 2022 945th bwat2 601 212 518ms 4 Apr 2022 946th SirFireball3521 600 163 11ms 1 Nov 2022 946th TRexOnGit 600 163 10ms 30 Jan 2024 946th madex 🇩🇪 600 163 10ms 9 Jul 2024 946th strattonwhisler 600 163 10ms 27 Mar 2025 950th Radwatch 600 197 60ms 14 Jun 2022 951st SirFireball3521 599 113 9ms 27 Jan 2023 951st mathisfun271 599 113 10ms 15 Dec 2023 951st fourth-bit 599 113 10ms 4 Jul 2024 951st Bulmenisaurus 599 113 9ms 28 Oct 2024 951st ahmetdemirag 🇨🇾 599 113 10ms 12 Mar 2025 951st GodlyProgrammer1 599 113 10ms 27 Nov 2025 951st FoxInTheClouds 599 113 10ms 8 Feb 2026 958th stefangimmillaro 596 152 2ms 25 Apr 2023 959th AnnoyedArt1256 596 164 9ms 10 Aug 2022 959th FrederikHutfless 🇩🇪 596 164 10ms 12 Jan 2023 First Prev 881–960 of 2,313 Next Last