The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Tower of Hanoi 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 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 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers 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 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 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 641st bitsandbeyond 🇳🇱 655 75 94ms 5 Nov 2025 642nd mousetail 🇳🇱 652 77 11ms 27 days ago 643rd GolfingSuccess 🇬🇷 651 157 450ms 14 days ago 644th bitsandbeyond 🇳🇱 650 98 9ms 16 Nov 2025 645th AutumnWind75 648 119 385ms 10 days ago 646th Bmrl7 644 78 11ms 21 hours ago 647th AlephSquirrel 641 105 8ms 20 days ago 648th MeWhenI 🇻🇦 639 104 17ms 27 days ago 649th HumanoidCPU 637 111 110ms 20 days ago 650th GolfingSuccess 🇬🇷 635 72 1ms 30 Oct 2025 651st msbranicky 635 79 11ms 25 days ago 652nd dokutan 635 163 1,613ms 15 days ago 653rd HumanoidCPU 633 111 370ms 21 days ago 654th HumanoidCPU 632 122 72ms 22 days ago 655th JOrE20 🇺🇸 631 70 8ms 22 days ago 656th BREMAUCY 🇫🇷 630 97 4,001ms 17 days ago 657th msbranicky 630 131 269ms 17 days ago 658th prestosilver 🇺🇸 628 97 2ms 17 days ago 659th aksyristos 627 123 56ms 17 days ago 660th rucin93 🇵🇱 625 64 51ms 30 Oct 2025 661st msbranicky 624 108 8ms 17 days ago 662nd msbranicky 623 79 448ms 17 days ago 663rd alexsave 622 71 9ms 20 days ago 664th HumanoidCPU 620 85 90ms 21 days ago 665th HumanoidCPU 620 105 111ms 22 days ago 666th albanian-laundromat 616 82 5ms 25 days ago 667th albanian-laundromat 616 99 2ms 21 days ago 668th MeWhenI 🇻🇦 615 76 7ms 23 Nov 2025 669th IISResetMe 615 78 278ms 21 days ago 670th HumanoidCPU 614 72 9ms 22 days ago 670th olleicua 🇺🇸 614 72 10ms 13 days ago 672nd JOrE20 🇺🇸 613 102 43ms 22 days ago 673rd tomh1012 613 104 415ms 19 days ago 674th themoonisacheese 612 82 11ms 11 days ago 675th HumanoidCPU 608 105 404ms 22 days ago 676th HumanoidCPU 608 121 407ms 21 days ago 677th AlephSquirrel 607 79 271ms 20 days ago 678th RDShah 605 83 11ms 19 days ago 679th MeWhenI 🇻🇦 605 100 6ms 27 days ago 680th anter69 🇭🇺 604 74 33ms 15 days ago 680th D-MOVE 🇵🇭 604 74 46ms 11 days ago 682nd MeWhenI 🇻🇦 604 111 125ms 27 days ago 683rd Schmitt-Very-Cool 600 127 10ms 15 days ago 684th HumanoidCPU 599 74 130ms 22 days ago 685th CaedenHarper 🇨🇦 599 88 107ms 21 days ago 686th CatsAreFluffy 597 67 51ms 30 Oct 2025 687th Nicronmil 597 74 9ms 10 days ago 687th two-bad 🇬🇧 597 74 10ms 3 days ago 689th anter69 🇭🇺 597 77 809ms 15 days ago 690th olleicua 🇺🇸 596 75 54ms 13 days ago 691st MeWhenI 🇻🇦 595 74 100ms 27 days ago 692nd HumanoidCPU 595 107 9ms 21 days ago 693rd CaedenHarper 🇨🇦 592 81 240ms 21 days ago 694th zgialor-lab 591 85 28ms 4 days ago 695th KatieLG 🇬🇧 589 108 8ms 20 days ago 696th Yewzir 🇧🇪 585 82 285ms 20 days ago 697th aksyristos 585 83 2ms 17 days ago 698th BREMAUCY 🇫🇷 585 109 461ms 19 days ago 699th BREMAUCY 🇫🇷 585 141 260ms 18 days ago 700th Schmitt-Very-Cool 584 86 10ms 16 days ago 701st dokutan 582 73 228ms 22 days ago 702nd Protothor 581 76 9ms 17 days ago 703rd albanian-laundromat 578 104 1,258ms 30 Oct 2025 704th prestosilver 🇺🇸 575 99 130ms 2 days ago 705th Maashau 575 106 2ms 19 days ago 706th SwordF-Official 574 92 2ms 16 Nov 2025 706th HumanoidCPU 574 92 2ms 21 days ago 708th BREMAUCY 🇫🇷 573 78 38ms 19 days ago 709th MeWhenI 🇻🇦 573 111 16ms 22 days ago 710th HumanoidCPU 572 181 2,256ms 21 days ago 711th Schmitt-Very-Cool 571 128 69ms 15 days ago 712th bitsandbeyond 🇳🇱 563 71 51ms 7 Nov 2025 713th CaedenHarper 🇨🇦 557 121 10ms 21 days ago 714th bitsandbeyond 🇳🇱 551 107 4ms 16 Nov 2025 715th SirBogman 🇺🇸 548 59 5ms 18 days ago 716th HumanoidCPU 545 88 264ms 20 days ago 717th Schmitt-Very-Cool 541 130 446ms 20 days ago 718th CLOStrophobic 🇮🇹 540 93 10ms 17 days ago 719th Schmitt-Very-Cool 540 142 27ms 16 days ago 720th emgordon154 538 79 3ms 27 days ago First Prev 641–720 of 1,105 Next Last