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?
Fractions 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 637th Shanethegamer 🇺🇸 794 71 435ms 8 Oct 2024 637th edsrzf 🇳🇿 794 71 419ms 15 days ago 643rd NewDefectus 🇮🇱 794 162 57ms 4 Sep 2021 644th 4hg 🇺🇸 793 76 18ms 24 Oct 2022 645th dokutan 793 79 1,290ms 28 Mar 2025 646th edsrzf 🇳🇿 793 133 29ms 13 Feb 2026 647th primo-ppcg 🇹🇭 792 53 38ms 6 Sep 2021 648th ovs-code 🇩🇪 792 121 13ms 20 Jul 2023 649th arjanadriaanse 🇳🇱 792 135 140ms 29 Jan 2022 650th Yewzir 🇧🇪 791 137 2,871ms 24 May 2023 651st Salutations45 790 52 3ms 30 Dec 2024 652nd ManuCoding 790 76 12ms 27 Sep 2021 652nd itsh01 790 76 10ms 20 Oct 2021 652nd Shanethegamer 🇺🇸 790 76 11ms 16 Oct 2022 652nd MeWhenI 🇻🇦 790 76 11ms 9 May 2023 652nd biocommando 🇫🇮 790 76 11ms 16 Aug 2023 652nd coreynash 790 76 11ms 12 Oct 2023 652nd jbt 790 76 10ms 26 Dec 2023 652nd wansacis 🇩🇪 790 76 12ms 1 May 2024 652nd stefangimmillaro 790 76 12ms 19 May 2024 652nd JOrE20 790 76 12ms 28 Jan 2026 662nd GrayJoKing 🇦🇺 789 19 44ms 28 Jul 2022 662nd Natanaelel 🇸🇪 789 19 45ms 22 Jun 2023 662nd Steffan153 🇫🇮 789 19 45ms 16 Aug 2024 665th primo-ppcg 🇹🇭 789 99 407ms 6 Nov 2021 666th stefangimmillaro 787 160 254ms 21 May 2024 667th MeWhenI 🇻🇦 786 93 39ms 13 Feb 2025 668th marshallward 🇺🇸 785 149 43ms 6 May 2025 668th MeWhenI 🇻🇦 785 149 43ms 29 Dec 2025 670th Shanethegamer 🇺🇸 784 81 6ms 27 Sep 2024 671st sean-niemann 🇺🇸 784 133 434ms 20 Jun 2025 672nd Yewzir 🇧🇪 783 72 414ms 15 Jan 2024 672nd MeWhenI 🇻🇦 783 72 489ms 13 Jul 2024 672nd inventshah 783 72 436ms 8 Oct 2024 672nd m-tkach 🇺🇦 783 72 449ms 8 Oct 2024 676th schachmattmatt 783 77 10ms 2 Oct 2021 676th Fishron 783 77 11ms 18 Oct 2021 676th hiichbindermax 783 77 11ms 22 Oct 2021 676th Romain-1 🇫🇷 783 77 10ms 3 May 2022 676th Mortis66666 783 77 10ms 28 May 2022 676th KatieLG 🇬🇧 783 77 10ms 11 Dec 2022 676th m42km 783 77 10ms 7 Nov 2023 676th zwxzwxzwx21 783 77 17ms 30 Jan 2024 676th elgan65536 🇺🇸 783 77 10ms 4 Apr 2024 676th 5quiwyrm 783 77 10ms 12 Nov 2024 676th JunkIce 783 77 10ms 24 Nov 2024 676th albanian-laundromat 783 77 11ms 11 Apr 2025 676th luuumine 🇫🇷 783 77 10ms 9 Nov 2025 676th carotinoid 🇰🇷 783 77 11ms 5 days ago 690th Sora1248 🇩🇪 782 111 1ms 6 Feb 2023 691st emgordon154 782 124 498ms 31 May 2025 692nd HumanoidCPU 781 142 123ms 2 May 2024 693rd orthoplex 🇨🇽 779 35 102ms 27 Oct 2021 693rd galloj 🇨🇿 779 35 760ms 2 Feb 2023 695th thisishowmymindworks 🇳🇴 779 77 10ms 25 Sep 2021 695th madex 🇩🇪 779 77 11ms 12 days ago 697th typeswitch-dev 🇵🇹 779 123 9ms 3 Aug 2023 698th MeWhenI 🇻🇦 779 156 2ms 11 Sep 2022 699th jared-hughes 779 203 12ms 8 Jul 2024 700th ovs-code 🇩🇪 778 82 89ms 5 Jun 2025 701st Lydxn 🇨🇦 778 134 387ms 21 Nov 2021 701st primo-ppcg 🇹🇭 778 134 373ms 10 Apr 2025 703rd JayXon 🇺🇸 777 54 38ms 6 Sep 2021 704th retrohun 775 53 2ms 9 Nov 2022 705th Irratix 🇳🇱 775 112 2ms 20 Dec 2021 705th iakolzin 775 112 2ms 8 Jun 2022 707th Shanethegamer 🇺🇸 774 63 361ms 19 Nov 2025 708th varhammer 774 82 9ms 13 Dec 2023 709th CatsAreFluffy 774 140 65ms 29 Jan 2023 709th yeminghan2021 774 140 63ms 3 Feb 2025 711th wuzekai518 773 78 11ms 18 Sep 2024 711th nstearns96 🇬🇧 773 78 18ms 23 Oct 2024 711th souta-1326 773 78 17ms 24 Mar 2025 711th redweasel 773 78 16ms 13 Jul 2025 715th alemelis 772 73 413ms 9 Oct 2024 716th DialFrost 🇸🇬 772 135 441ms 29 Oct 2024 717th ovs-code 🇩🇪 771 97 15ms 4 Jul 2024 718th SirBogman 🇺🇸 770 55 444ms 11 Apr 2024 719th SirBogman 🇺🇸 770 152 44ms 3 Jun 2025 720th prplz 🇦🇺 769 78 14ms 30 Apr 2022 First Prev 641–720 of 1,996 Next Last