The Tower of Hanoi hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Leap Years in C# 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 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 Chars Time Submitted 75th thisishowmymindworks 🇳🇴 851 67 319ms 21 Nov 2021 75th ToriTheChicken 851 67 317ms 21 Nov 2021 75th postie77 851 67 305ms 17 Nov 2022 75th astdefu 851 67 320ms 10 Dec 2022 75th dorschmeister 851 67 318ms 18 May 2023 75th rifatx 851 67 310ms 9 Jul 2024 75th Bubblesphere 851 67 331ms 24 Dec 2024 75th CaedenHarper 🇨🇦 851 67 354ms 1 Feb 2025 75th Mikey-Beep 🇬🇧 851 67 318ms 23 Jul 2025 85th Re-Adventures 🇮🇳 838 68 326ms 15 Feb 2022 85th malworthy 838 68 324ms 17 Oct 2023 85th michelebastione 🇮🇹 838 68 354ms 6 Aug 2025 85th snoozingnewt 🇺🇸 838 68 318ms 4 Oct 2025 89th muztanger 826 69 304ms 21 Nov 2021 89th tdkkdt 🇷🇺 826 69 325ms 21 Nov 2021 89th ericlangedijk 🇸🇮 826 69 316ms 19 Mar 2022 89th hacktick 826 69 318ms 22 Mar 2022 89th RandGuy 826 69 316ms 1 Apr 2022 89th arctouch-cristiannevianna 826 69 314ms 21 Jun 2023 95th jahakari 814 70 312ms 21 Nov 2021 95th Trickermand 814 70 310ms 21 Nov 2021 95th shellbertt 🇨🇦 814 70 313ms 3 Dec 2021 95th ChrisTheisen 814 70 318ms 12 Dec 2022 95th StronkCheese 🇺🇸 814 70 318ms 4 Feb 2023 95th TimJackMaster 814 70 310ms 16 Feb 2023 95th Sora1248 🇩🇪 814 70 315ms 19 Feb 2023 95th 1231234md5 🇨🇳 814 70 311ms 11 Dec 2023 103rd Cbrt74088 803 71 316ms 21 Nov 2021 103rd mandm-pt 803 71 314ms 21 Nov 2021 103rd bschorno 803 71 312ms 3 Aug 2022 103rd bac0id 803 71 325ms 26 Sep 2023 103rd kkoenig 803 71 314ms 22 Dec 2023 108th c0d3-4-F00d 🇩🇪 792 72 322ms 21 Nov 2021 108th grabthefish 792 72 319ms 21 Nov 2021 108th tomh1012 792 72 335ms 21 Nov 2021 108th hippopotam00sehead 🇨🇦 792 72 344ms 11 Sep 2024 108th edsrzf 🇳🇿 792 72 313ms 12 Nov 2024 113th afgarciam 781 73 316ms 21 Nov 2021 113th meesterturner 781 73 334ms 21 Nov 2021 113th mickeyMouse1108 781 73 337ms 21 Nov 2021 113th qpooqp 781 73 312ms 21 Nov 2021 113th gpikmddk 781 73 318ms 12 Aug 2022 118th Adelzu 770 74 310ms 21 Nov 2021 118th bdawgert 770 74 309ms 21 Nov 2021 118th MarkStockwellZA 770 74 310ms 4 Jan 2022 118th rolandbogdan 770 74 303ms 28 Jul 2022 118th Alex-Huggett 🇬🇧 770 74 320ms 13 Apr 2024 123rd jsermini2 760 75 315ms 21 Nov 2021 123rd pikti 760 75 308ms 21 Nov 2021 123rd ertz1ertz 760 75 316ms 12 Jul 2024 126th mort607e 750 76 313ms 21 Nov 2021 126th pandapawskat 750 76 311ms 21 Nov 2021 126th Skleni 750 76 318ms 29 Mar 2023 129th Smetalo 740 77 317ms 25 Aug 2022 130th Hankinabag 731 78 315ms 21 Nov 2021 130th HassanAliKadhem 🇧🇭 731 78 318ms 16 Jan 2022 132nd arndta 722 79 352ms 21 Nov 2021 132nd Maximizer02 722 79 315ms 18 Oct 2023 134th jwalaszek 713 80 312ms 21 Nov 2021 135th ms-tingliang 704 81 313ms 5 Aug 2022 136th sm1lko 671 85 322ms 12 Oct 2022 137th danmunozmunoz 🇪🇸 588 97 329ms 24 Nov 2022 138th JacobStanleyJones 576 99 324ms 21 Nov 2021 138th Xwilarg 🇫🇷 576 99 337ms 21 Nov 2021 138th artisiole 🇺🇸 576 99 309ms 4 Mar 2022 141st Jennifervl 🇸🇪 553 103 323ms 11 Dec 2021 142nd HumanEquivalentUnit 548 104 326ms 28 Dec 2021 143rd nickdevore 538 106 314ms 21 Nov 2021 143rd bilal2709 538 106 328ms 3 Sep 2025 145th horvaro 514 111 325ms 15 Jun 2023 146th liorksh 504 113 328ms 21 Nov 2021 147th RobertEves92 🇬🇧 487 117 314ms 15 May 2024 148th Cool-Ari 479 119 324ms 7 Aug 2022 149th Pyro569 471 121 318ms 20 Jul 2023 150th hdformat 438 130 316ms 21 Nov 2021 First Prev 76–150 of 157 Next Last