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?
Intersection 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 401st emgordon154 802 169 455ms 30 May 2025 402nd b-illy 🇬🇧 801 112 403ms 30 Dec 2024 403rd inventshah 801 128 2,631ms 26 Oct 2024 404th sean-niemann 🇺🇸 801 191 42ms 8 Jan 2024 405th kg583 🇺🇸 801 210 76ms 5 days ago 406th ovs-code 🇩🇪 798 93 11ms 1 Dec 2025 407th sisyphus-ppcg 🇦🇺 798 105 120ms 13 Oct 2023 408th bbonenfant 798 131 11ms 21 Nov 2020 408th geofft 798 131 10ms 10 Dec 2020 408th schachmattmatt 798 131 10ms 11 Aug 2021 408th MichaelMBradley 🇨🇦 798 131 10ms 19 Jun 2022 408th b10011 🇫🇮 798 131 11ms 16 Jan 2023 408th wuzekai518 798 131 10ms 2 Aug 2024 408th starfihs 798 131 10ms 23 Feb 2025 408th dirckvdende 798 131 10ms 11 Jul 2025 408th InigoK 🇺🇸 798 131 11ms 10 Sep 2025 417th MeWhenI 🇻🇦 797 36 63ms 26 Jul 2022 418th xsot 🇸🇬 797 74 2ms 11 Aug 2024 419th nullie 797 211 245ms 3 Jan 2025 420th emplv 🇱🇻 796 199 316ms 4 Feb 2026 421st SirBogman 🇺🇸 794 34 3ms 26 Mar 2022 422nd primo-ppcg 🇹🇭 794 162 206ms 27 May 2021 423rd GrayJoKing 🇦🇺 793 157 8ms 21 days ago 424th arctouch-cristiannevianna 792 184 412ms 4 Mar 2024 425th henrytranter 791 132 11ms 9 Oct 2020 425th andre-lameirinhas 🇵🇹 791 132 10ms 11 Oct 2020 425th adoxography 791 132 10ms 23 Jan 2021 425th UBKorkut 791 132 10ms 12 Mar 2021 425th buffalocat 791 132 11ms 3 May 2021 425th pascscha 791 132 10ms 13 May 2021 425th knutae 🇳🇴 791 132 10ms 29 Jun 2021 425th RYNO8 791 132 10ms 23 Aug 2021 425th itsjustfreekie 791 132 10ms 18 Sep 2021 425th estomagordo 🇳🇱 791 132 10ms 7 Dec 2021 425th amollberg 🇸🇪 791 132 10ms 29 Jan 2022 425th CedricGebistorf 791 132 11ms 6 Mar 2022 425th cooljoseph1 791 132 11ms 6 May 2022 425th abba23 791 132 10ms 27 May 2022 425th nullie 791 132 10ms 8 Jun 2022 425th georgehulme 791 132 10ms 12 Oct 2022 425th astonm 791 132 11ms 15 Nov 2022 425th RDShah 791 132 10ms 23 Nov 2022 425th myleopard 791 132 10ms 23 Dec 2022 425th dranjohn 791 132 10ms 11 Sep 2023 425th vgamula 🇺🇦 791 132 11ms 17 Nov 2023 425th dragonshadows07 791 132 10ms 19 Jan 2024 425th SB-945 791 132 10ms 24 Jan 2024 425th AtengChen 791 132 10ms 17 Aug 2024 425th maxgodfrey2004 🇨🇦 791 132 11ms 5 Jan 2025 425th croc54 791 132 11ms 8 Jan 2025 425th CLOStrophobic 🇮🇹 791 132 10ms 8 Feb 2025 425th connor-grady 791 132 11ms 7 May 2025 425th qpwoeirut 791 132 10ms 3 Aug 2025 425th jacekwladzinski 791 132 10ms 5 Oct 2025 425th Lv0Sys 🇵🇱 791 132 11ms 4 Dec 2025 425th Natanaelel 🇸🇪 791 132 11ms 16 Feb 2026 425th bitsandbeyond 🇳🇱 791 132 11ms 16 Feb 2026 425th madex 🇩🇪 791 132 10ms 16 Feb 2026 425th JOrE20 791 132 10ms 18 Feb 2026 425th D-MOVE 🇵🇭 791 132 10ms 19 Feb 2026 425th YAJUE114514 791 132 10ms 20 Feb 2026 462nd DanielVenable 790 154 144ms 7 Aug 2025 463rd primo-ppcg 🇹🇭 790 223 444ms 28 Sep 2021 464th lynn 789 163 207ms 18 May 2021 465th luuumine 🇫🇷 789 213 215ms 28 Nov 2025 466th GolfingSuccess 🇬🇷 788 171 2ms 27 Nov 2023 467th Shanethegamer 🇺🇸 788 201 292ms 14 Jul 2023 468th BambooleanLogic 🇸🇪 786 115 12ms 7 Nov 2022 468th MeWhenI 🇻🇦 786 115 13ms 21 Aug 2023 468th weliveinhell 🇭🇹 786 115 10ms 18 Feb 2026 471st AGoyet 786 133 10ms 29 Jun 2022 471st galloj 🇨🇿 786 133 10ms 4 Mar 2023 471st jfallon1997 786 133 10ms 9 Apr 2024 471st bknower 786 133 11ms 30 Jun 2025 471st aalec 786 133 11ms 9 Nov 2025 471st FoxInTheClouds 786 133 29ms 17 Feb 2026 471st Googolplexo 🇷🇺 786 133 11ms 5 hours ago 478th JDiLenarda 🇫🇷 786 160 1,362ms 19 Nov 2023 479th kgodara 784 152 86ms 18 Jan 2024 480th JOrE20 784 193 58ms 19 Feb 2026 First Prev 401–480 of 1,363 Next Last