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 HumanoidCPU 619 105 111ms 20 days ago 642nd albanian-laundromat 616 82 5ms 23 days ago 643rd dokutan 615 73 228ms 21 days ago 644th MeWhenI 🇻🇦 615 76 7ms 26 days ago 645th IISResetMe 615 78 278ms 19 days ago 646th albanian-laundromat 615 99 2ms 19 days ago 647th HumanoidCPU 614 72 9ms 20 days ago 647th olleicua 🇺🇸 614 72 10ms 11 days ago 649th JOrE20 🇺🇸 613 102 43ms 20 days ago 650th tomh1012 613 104 415ms 17 days ago 651st HumanoidCPU 608 121 407ms 19 days ago 652nd anter69 🇭🇺 607 77 809ms 13 days ago 653rd AlephSquirrel 607 79 271ms 18 days ago 654th HumanoidCPU 607 105 404ms 20 days ago 655th MeWhenI 🇻🇦 605 100 6ms 25 days ago 656th D-MOVE 🇵🇭 604 74 46ms 10 days ago 657th MeWhenI 🇻🇦 604 111 125ms 25 days ago 658th themoonisacheese 601 82 11ms 10 days ago 659th msbranicky 600 79 448ms 15 days ago 660th Schmitt-Very-Cool 600 127 10ms 13 days ago 661st CaedenHarper 🇨🇦 599 88 107ms 19 days ago 662nd HumanoidCPU 598 74 130ms 20 days ago 663rd Nicronmil 597 74 9ms 8 days ago 663rd two-bad 🇬🇧 597 74 10ms 47 hours ago 665th olleicua 🇺🇸 596 75 54ms 11 days ago 666th HumanoidCPU 595 107 9ms 20 days ago 667th RDShah 593 83 11ms 17 days ago 668th CaedenHarper 🇨🇦 592 81 240ms 19 days ago 669th BREMAUCY 🇫🇷 590 141 260ms 17 days ago 670th KatieLG 🇬🇧 589 108 8ms 18 days ago 671st Yewzir 🇧🇪 585 82 285ms 19 days ago 672nd aksyristos 585 83 2ms 16 days ago 673rd BREMAUCY 🇫🇷 585 109 461ms 18 days ago 674th MeWhenI 🇻🇦 583 74 100ms 25 days ago 675th Protothor 581 76 9ms 15 days ago 676th zgialor-lab 579 85 28ms 2 days ago 677th albanian-laundromat 578 104 1,258ms 30 Oct 2025 678th prestosilver 🇺🇸 575 99 130ms 22 hours ago 679th Maashau 575 106 2ms 18 days ago 680th SwordF-Official 574 92 2ms 16 Nov 2025 680th HumanoidCPU 574 92 2ms 20 days ago 682nd BREMAUCY 🇫🇷 573 78 38ms 18 days ago 683rd Schmitt-Very-Cool 573 86 10ms 14 days ago 684th MeWhenI 🇻🇦 573 111 16ms 21 days ago 685th Schmitt-Very-Cool 571 128 69ms 13 days ago 686th dokutan 567 110 68ms 6 days ago 687th HumanoidCPU 562 111 110ms 19 days ago 688th CaedenHarper 🇨🇦 557 121 10ms 19 days ago 689th bitsandbeyond 🇳🇱 551 107 4ms 16 Nov 2025 690th SirBogman 🇺🇸 548 59 5ms 16 days ago 691st HumanoidCPU 545 88 264ms 19 days ago 692nd dokutan 545 134 692ms 8 days ago 693rd Schmitt-Very-Cool 540 130 446ms 18 days ago 694th Schmitt-Very-Cool 540 142 27ms 14 days ago 695th emgordon154 538 79 3ms 25 days ago 696th dokutan 535 357 12ms 21 days ago 697th lacrosse 532 84 54ms 19 days ago 697th TheZwierzLF 🇵🇱 532 84 42ms 2 days ago 699th CLOStrophobic 🇮🇹 530 93 10ms 15 days ago 700th HumanoidCPU 528 95 76ms 20 days ago 701st aksyristos 526 85 52ms 16 days ago 702nd aksyristos 526 146 27ms 16 days ago 703rd Schmitt-Very-Cool 520 160 265ms 14 days ago 704th logalex8369 🇺🇸 513 96 10ms 21 hours ago 705th bitsandbeyond 🇳🇱 512 131 116ms 20 days ago 706th dokutan 510 116 3ms 8 days ago 707th ravnskjaer 🇩🇰 505 139 337ms 4 days ago 708th aksyristos 505 165 248ms 16 days ago 709th OllieBoyne 🇬🇧 503 98 12ms 7 days ago 710th CaedenHarper 🇨🇦 497 94 7ms 20 days ago 711th MeWhenI 🇻🇦 487 80 32ms 25 days ago 712th bitsandbeyond 🇳🇱 470 126 3ms 31 Oct 2025 713th CaedenHarper 🇨🇦 469 218 447ms 19 days ago 714th BREMAUCY 🇫🇷 465 165 27ms 16 days ago 715th HumanoidCPU 458 149 43ms 19 days ago 716th aksyristos 455 148 9ms 16 days ago 717th dokutan 454 200 14ms 21 days ago 718th logalex8369 🇺🇸 451 98 17ms 21 hours ago 719th dokutan 449 175 96ms 6 days ago 720th robbertvz 432 114 11ms 4 days ago First Prev 641–720 of 1,070 Next Last