The Tower of Hanoi hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Card Number Validation 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 376th MeWhenI 🇻🇦 742 162 27ms 2 Oct 2024 377th SirBogman 🇺🇸 741 63 275ms 23 Jul 2025 378th sean-niemann 🇺🇸 740 116 385ms 24 Oct 2024 379th DialFrost 🇸🇬 739 76 765ms 9 Oct 2024 380th KrausRaus 🇺🇸 739 87 9ms 1 Oct 2024 380th GeorgeStechman 🇬🇧 739 87 9ms 24 Oct 2024 380th coreynash 739 87 9ms 13 Feb 2025 383rd Shanethegamer 🇺🇸 739 172 42ms 2 Oct 2024 384th Shanethegamer 🇺🇸 738 90 2,988ms 28 Oct 2024 385th neihousaigaai 737 108 16ms 4 Oct 2024 385th StefanHabel 🇨🇦 737 108 16ms 23 Jan 2025 385th CaedenHarper 🇨🇦 737 108 17ms 22 Jul 2025 385th BrunoVisnadi 🇧🇷 737 108 18ms 1 Oct 2025 389th lifthrasiir 🇰🇷 736 90 568ms 2 Dec 2024 390th MeWhenI 🇻🇦 736 111 122ms 2 Oct 2024 391st MeWhenI 🇻🇦 735 34 61ms 2 Oct 2024 391st emgordon154 735 34 60ms 11 Sep 2025 393rd stefangimmillaro 735 92 7ms 2 Oct 2024 393rd Shanethegamer 🇺🇸 735 92 5ms 3 Oct 2024 395th Shanethegamer 🇺🇸 733 116 21ms 1 Oct 2024 396th Shanethegamer 🇺🇸 732 100 116ms 24 May 2025 397th Shanethegamer 🇺🇸 732 156 30ms 2 Oct 2024 398th kirjavascript 731 88 9ms 15 Mar 2025 399th Shanethegamer 🇺🇸 731 101 4ms 2 Oct 2024 400th stefangimmillaro 731 114 333ms 13 Oct 2024 401st MeWhenI 🇻🇦 730 174 39ms 13 Feb 2025 402nd anter69 🇭🇺 729 78 1,023ms 1 Oct 2024 403rd Shanethegamer 🇺🇸 729 112 102ms 3 Oct 2024 404th MeWhenI 🇻🇦 726 88 130ms 2 Oct 2024 404th Shanethegamer 🇺🇸 726 88 132ms 8 Jan 2025 406th cros107 🇦🇺 724 110 16ms 1 Jan 2025 406th guilhem-roy 🇫🇷 724 110 16ms 29 May 2025 408th Shanethegamer 🇺🇸 724 126 1,343ms 2 Oct 2024 409th dtbao20 🇻🇳 723 89 9ms 1 Oct 2024 409th madeforlosers 723 89 9ms 17 Oct 2024 409th junkondo-jp 723 89 10ms 14 Dec 2024 412th annaproxy 723 132 19ms 1 Oct 2024 413th MeWhenI 🇻🇦 721 179 1,554ms 20 days ago 414th weeble 720 74 8ms 1 Jul 2025 415th MeWhenI 🇻🇦 720 78 287ms 2 Oct 2024 416th Shanethegamer 🇺🇸 720 96 2ms 3 Oct 2024 417th voytxt 🇨🇿 718 89 132ms 17 Apr 2025 418th mousetail 🇳🇱 718 111 16ms 6 Oct 2024 419th alexsave 715 90 9ms 28 Oct 2024 420th anter69 🇭🇺 713 67 46ms 1 Oct 2024 421st SirBogman 🇺🇸 713 93 521ms 23 Jul 2025 422nd rzv-me 711 95 5ms 5 Oct 2024 423rd OllieBoyne 🇬🇧 711 112 16ms 17 Oct 2024 423rd WillConker 711 112 10ms 22 Oct 2024 423rd maxgodfrey2004 🇨🇦 711 112 10ms 4 Jan 2025 423rd Babafaba 711 112 16ms 17 days ago 427th snyderek 🇺🇸 710 121 53ms 1 Oct 2024 428th Natanaelel 🇸🇪 709 55 42ms 1 Mar 2025 429th snoozingnewt 🇺🇸 709 95 75ms 23 Oct 2025 430th DialFrost 🇸🇬 709 106 11ms 13 Dec 2024 431st DialFrost 🇸🇬 707 132 213ms 8 Apr 2025 432nd Shanethegamer 🇺🇸 706 118 332ms 2 Oct 2024 433rd SB-945 705 113 16ms 1 Oct 2024 433rd Artemis21 🇬🇧 705 113 16ms 23 Jan 2025 433rd fkantelberg 705 113 9ms 11 Jul 2025 436th MeWhenI 🇻🇦 704 115 435ms 5 Oct 2024 437th Alex-x90 🇺🇸 703 100 2ms 1 Oct 2024 438th cbrt-x 703 157 197ms 1 Oct 2024 439th janlelis 702 68 37ms 1 Oct 2024 440th emgordon154 702 76 6ms 7 Jun 2025 441st mousetail 🇳🇱 701 133 152ms 3 Oct 2024 442nd LukeBridges 🇬🇧 699 92 10ms 3 Oct 2024 443rd HumanoidCPU 699 114 62ms 7 Mar 2025 443rd blaztoma 🇱🇹 699 114 16ms 25 Sep 2025 445th BlankSpruce 698 123 376ms 1 Oct 2024 446th emgordon154 696 101 2ms 25 Nov 2024 447th emgordon154 696 134 213ms 25 Feb 2025 448th tobeannouncd 695 159 162ms 13 Dec 2024 449th Shanethegamer 🇺🇸 693 41 3ms 4 Oct 2024 450th jipsong 🇩🇪 693 115 16ms 12 May 2025 First Prev 376–450 of 831 Next Last