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 559th igmcdowell 766 118 11ms 14 Nov 2021 562nd MichalMarsalek 🇨🇿 765 148 412ms 29 Nov 2021 562nd Ripick 765 148 402ms 24 Feb 2025 564th tobeannouncd 765 159 140ms 2 Jan 2024 565th rucin93 🇵🇱 764 167 3ms 9 Jun 2025 566th MarcMush 🇫🇷 763 137 10ms 9 Jul 2021 566th QuincyNash 🇺🇸 763 137 10ms 20 Jan 2022 566th bob-th 763 137 10ms 19 Jul 2022 566th FrancoisXavierDecroix 763 137 10ms 16 Apr 2024 566th FranklinJiaChen 763 137 11ms 5 Aug 2024 571st Attero 🇸🇪 762 143 5ms 5 Oct 2020 572nd Irratix 🇳🇱 761 177 2ms 27 Dec 2021 572nd m-tkach 🇺🇦 761 177 2ms 23 May 2022 572nd Alex-x90 🇺🇸 761 177 1ms 15 Jul 2023 575th emgordon154 760 118 555ms 12 Jan 2025 576th roland-golf 760 175 297ms 1 Nov 2022 577th neihousaigaai 759 119 12ms 14 Mar 2022 578th kmathis22 759 232 412ms 7 Oct 2025 579th jiaminglimjm 🇲🇾 757 138 10ms 9 Jan 2021 579th ArmaanAS 757 138 10ms 25 Mar 2021 579th urojony 🇵🇱 757 138 10ms 27 May 2021 579th TinyTheBrontosaurus 757 138 11ms 3 Dec 2023 579th markusgraube 757 138 10ms 1 Jul 2024 579th Mathrew2012 757 138 11ms 15 Aug 2024 579th fuzzylojik-golf 🇺🇸 757 138 31ms 12 days ago 586th southpolenator 757 178 2ms 15 Jun 2023 587th southpolenator 757 202 439ms 15 Jun 2023 588th betaveros 755 38 63ms 10 Aug 2022 589th mtirado1 755 158 2ms 23 Dec 2022 590th commandz0 🇺🇸 754 119 519ms 1 Sep 2025 591st fantaize 754 223 233ms 17 days ago 592nd AforAmpere 752 139 11ms 21 Feb 2021 593rd arjanadriaanse 🇳🇱 752 149 20ms 28 Sep 2023 594th DialFrost 🇸🇬 752 323 1,455ms 6 Mar 2025 595th marcin7Cd 751 162 147ms 5 Oct 2020 595th ReidZ3 🇺🇸 751 162 143ms 30 Nov 2020 597th SmartK8 🇨🇿 751 194 437ms 30 Oct 2022 598th albanian-laundromat 751 199 3ms 17 Nov 2025 599th stefangimmillaro 751 211 286ms 25 Sep 2023 600th janAkali 🇷🇺 750 151 392ms 17 Feb 2026 601st sean-niemann 🇺🇸 750 204 448ms 31 Dec 2023 602nd typeswitch-dev 🇵🇹 749 116 5ms 4 Aug 2023 603rd CornerMercury 🇬🇧 749 161 118ms 27 Nov 2025 604th Shanethegamer 🇺🇸 749 181 468ms 14 Jul 2023 605th tsunderu 🇯🇵 748 180 2ms 22 Sep 2021 605th sean-niemann 🇺🇸 748 180 2ms 31 Dec 2023 607th Babafaba 747 120 480ms 15 Oct 2025 608th argusdusty 🇺🇸 747 212 284ms 25 Dec 2020 609th ydevor 🇮🇱 746 140 11ms 20 Nov 2020 609th mathb0y512 746 140 11ms 20 Jan 2023 609th hellwue 746 140 11ms 17 Feb 2023 609th jtaxen 746 140 12ms 28 Apr 2024 609th zach333 746 140 13ms 13 Jul 2024 609th rustykitty 🇺🇸 746 140 11ms 4 Feb 2026 615th jared-hughes 745 160 2ms 6 Apr 2022 616th Shanethegamer 🇺🇸 744 107 1,259ms 24 Mar 2023 617th blaztoma 🇱🇹 744 162 120ms 23 Jan 2026 618th JGDoerrer 744 226 221ms 22 Jan 2022 619th kkoenig 742 206 444ms 20 Dec 2023 620th m42km 741 121 435ms 16 Jan 2024 620th Shanethegamer 🇺🇸 741 121 468ms 18 Jan 2024 620th neel11235813 741 121 465ms 10 Mar 2024 620th snoozingnewt 🇨🇦 741 121 438ms 10 Feb 2026 624th thisishowmymindworks 🇳🇴 741 122 10ms 17 Oct 2020 624th coreynash 741 122 16ms 19 Oct 2023 626th Waffle3z 741 141 11ms 8 Oct 2020 626th thisishowmymindworks 🇳🇴 741 141 17ms 17 Oct 2020 626th lemogne 741 141 10ms 9 Aug 2021 626th HerLovelyTentacles 741 141 10ms 22 Nov 2021 626th osmith93 741 141 10ms 10 Jul 2022 626th DavidHospital 741 141 10ms 22 Sep 2023 626th Peanut-XIV 741 141 10ms 9 Nov 2023 626th ridingqwerty 🇺🇸 741 141 10ms 1 Feb 2024 626th elgan65536 🇺🇸 741 141 11ms 6 Apr 2024 626th inverseLorentz 🇦🇺 741 141 10ms 22 Apr 2024 626th yokasuretsu 741 141 11ms 10 Jan 2025 626th khaninm 741 141 11ms 2 Jun 2025 626th Ignacio6D2 741 141 11ms 26 Feb 2026 639th NewDefectus 🇮🇱 740 97 53ms 13 Sep 2021 640th marcin7Cd 740 169 10ms 8 Feb 2021 First Prev 561–640 of 1,363 Next Last