The Calendar hole will go live in approximately 12 days. Why not try and solve it ahead of time?
Tower of Hanoi in all languages 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 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 Chars Time Submitted 641st albanian-laundromat 616 82 5ms 23 days ago 642nd dokutan 615 73 228ms 20 days ago 643rd MeWhenI 🇻🇦 615 76 7ms 26 days ago 644th IISResetMe 615 78 278ms 19 days ago 645th albanian-laundromat 615 99 2ms 19 days ago 646th HumanoidCPU 614 72 9ms 20 days ago 646th olleicua 🇺🇸 614 72 10ms 11 days ago 648th JOrE20 🇺🇸 613 102 43ms 20 days ago 649th tomh1012 613 104 415ms 17 days ago 650th HumanoidCPU 608 121 407ms 19 days ago 651st anter69 🇭🇺 607 77 809ms 13 days ago 652nd AlephSquirrel 607 79 271ms 18 days ago 653rd HumanoidCPU 607 105 404ms 20 days ago 654th MeWhenI 🇻🇦 605 100 6ms 25 days ago 655th D-MOVE 🇵🇭 604 74 46ms 9 days ago 656th MeWhenI 🇻🇦 604 111 125ms 25 days ago 657th themoonisacheese 601 82 11ms 9 days ago 658th msbranicky 600 79 448ms 15 days ago 659th Schmitt-Very-Cool 600 127 10ms 13 days ago 660th CaedenHarper 🇨🇦 599 88 107ms 19 days ago 661st HumanoidCPU 598 74 130ms 20 days ago 662nd Nicronmil 597 74 9ms 8 days ago 662nd two-bad 🇬🇧 597 74 10ms 39 hours ago 664th olleicua 🇺🇸 596 75 54ms 11 days ago 665th HumanoidCPU 595 107 9ms 19 days ago 666th RDShah 593 83 11ms 17 days ago 667th CaedenHarper 🇨🇦 592 81 240ms 19 days ago 668th BREMAUCY 🇫🇷 590 141 260ms 16 days ago 669th KatieLG 🇬🇧 589 108 8ms 18 days ago 670th Yewzir 🇧🇪 585 82 285ms 18 days ago 671st aksyristos 585 83 2ms 15 days ago 672nd BREMAUCY 🇫🇷 585 109 461ms 17 days ago 673rd MeWhenI 🇻🇦 583 74 100ms 25 days ago 674th Protothor 581 76 9ms 15 days ago 675th zgialor-lab 579 85 28ms 2 days ago 676th albanian-laundromat 578 104 1,258ms 30 Oct 2025 677th prestosilver 🇺🇸 575 99 130ms 14 hours ago 678th Maashau 575 106 2ms 17 days ago 679th SwordF-Official 574 92 2ms 16 Nov 2025 679th HumanoidCPU 574 92 2ms 20 days ago 681st BREMAUCY 🇫🇷 573 78 38ms 17 days ago 682nd Schmitt-Very-Cool 573 86 10ms 14 days ago 683rd MeWhenI 🇻🇦 573 111 16ms 20 days ago 684th Schmitt-Very-Cool 571 128 69ms 13 days ago 685th dokutan 567 110 68ms 6 days ago 686th HumanoidCPU 562 111 110ms 19 days ago 687th CaedenHarper 🇨🇦 557 121 10ms 19 days ago 688th bitsandbeyond 🇳🇱 551 107 4ms 16 Nov 2025 689th SirBogman 🇺🇸 548 59 5ms 16 days ago 690th HumanoidCPU 545 88 264ms 18 days ago 691st dokutan 545 134 692ms 8 days ago 692nd Schmitt-Very-Cool 540 130 446ms 18 days ago 693rd Schmitt-Very-Cool 540 142 27ms 14 days ago 694th emgordon154 538 79 3ms 25 days ago 695th dokutan 535 357 12ms 20 days ago 696th lacrosse 532 84 54ms 19 days ago 696th TheZwierzLF 🇵🇱 532 84 42ms 2 days ago 698th CLOStrophobic 🇮🇹 530 93 10ms 15 days ago 699th HumanoidCPU 528 95 76ms 20 days ago 700th aksyristos 526 85 52ms 15 days ago 701st aksyristos 526 146 27ms 15 days ago 702nd Schmitt-Very-Cool 520 160 265ms 14 days ago 703rd logalex8369 🇺🇸 513 96 10ms 14 hours ago 704th bitsandbeyond 🇳🇱 512 131 116ms 20 days ago 705th dokutan 510 116 3ms 8 days ago 706th ravnskjaer 🇩🇰 505 139 337ms 3 days ago 707th aksyristos 505 165 248ms 15 days ago 708th OllieBoyne 🇬🇧 503 98 12ms 7 days ago 709th CaedenHarper 🇨🇦 497 94 7ms 20 days ago 710th MeWhenI 🇻🇦 487 80 32ms 25 days ago 711th bitsandbeyond 🇳🇱 470 126 3ms 31 Oct 2025 712th CaedenHarper 🇨🇦 469 218 447ms 19 days ago 713th BREMAUCY 🇫🇷 465 165 27ms 16 days ago 714th HumanoidCPU 458 149 43ms 19 days ago 715th aksyristos 455 148 9ms 15 days ago 716th dokutan 454 200 14ms 20 days ago 717th logalex8369 🇺🇸 451 98 17ms 14 hours ago 718th dokutan 449 175 96ms 6 days ago 719th robbertvz 432 114 11ms 3 days ago 720th Schmitt-Very-Cool 413 116 277ms 14 days ago First Prev 641–720 of 1,069 Next Last