The Calendar hole will go live in approximately 11 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 632 111 370ms 20 days ago 642nd HumanoidCPU 632 122 72ms 21 days ago 643rd JOrE20 🇺🇸 631 70 8ms 21 days ago 644th msbranicky 630 131 269ms 16 days ago 645th BREMAUCY 🇫🇷 629 97 4,001ms 16 days ago 646th prestosilver 🇺🇸 628 97 2ms 16 days ago 647th aksyristos 627 123 56ms 16 days ago 648th msbranicky 624 79 11ms 24 days ago 649th msbranicky 624 108 8ms 16 days ago 650th alexsave 622 71 9ms 19 days ago 651st HumanoidCPU 620 85 90ms 20 days ago 652nd HumanoidCPU 620 105 111ms 21 days ago 653rd albanian-laundromat 616 82 5ms 24 days ago 654th dokutan 615 73 228ms 21 days ago 655th MeWhenI 🇻🇦 615 76 7ms 27 days ago 656th IISResetMe 615 78 278ms 20 days ago 657th albanian-laundromat 615 99 2ms 20 days ago 658th HumanoidCPU 614 72 9ms 21 days ago 658th olleicua 🇺🇸 614 72 10ms 12 days ago 660th JOrE20 🇺🇸 613 102 43ms 21 days ago 661st tomh1012 613 104 415ms 18 days ago 662nd HumanoidCPU 608 121 407ms 20 days ago 663rd AlephSquirrel 607 79 271ms 19 days ago 664th HumanoidCPU 607 105 404ms 21 days ago 665th MeWhenI 🇻🇦 605 100 6ms 26 days ago 666th D-MOVE 🇵🇭 604 74 46ms 10 days ago 667th MeWhenI 🇻🇦 604 111 125ms 26 days ago 668th msbranicky 601 79 448ms 16 days ago 669th themoonisacheese 601 82 11ms 10 days ago 670th Schmitt-Very-Cool 600 127 10ms 14 days ago 671st CaedenHarper 🇨🇦 599 88 107ms 20 days ago 672nd Nicronmil 597 74 9ms 9 days ago 672nd two-bad 🇬🇧 597 74 10ms 2 days ago 674th anter69 🇭🇺 597 77 809ms 14 days ago 675th olleicua 🇺🇸 596 75 54ms 12 days ago 676th HumanoidCPU 595 107 9ms 20 days ago 677th RDShah 594 83 11ms 18 days ago 678th CaedenHarper 🇨🇦 592 81 240ms 20 days ago 679th KatieLG 🇬🇧 589 108 8ms 19 days ago 680th HumanoidCPU 588 74 130ms 21 days ago 681st Yewzir 🇧🇪 585 82 285ms 19 days ago 682nd aksyristos 585 83 2ms 16 days ago 683rd BREMAUCY 🇫🇷 585 109 461ms 18 days ago 684th BREMAUCY 🇫🇷 585 141 260ms 17 days ago 685th MeWhenI 🇻🇦 583 74 100ms 26 days ago 686th Protothor 581 76 9ms 16 days ago 687th zgialor-lab 580 85 28ms 3 days ago 688th albanian-laundromat 578 104 1,258ms 30 Oct 2025 689th prestosilver 🇺🇸 575 99 130ms 37 hours ago 690th Maashau 575 106 2ms 18 days ago 691st SwordF-Official 574 92 2ms 16 Nov 2025 691st HumanoidCPU 574 92 2ms 21 days ago 693rd BREMAUCY 🇫🇷 573 78 38ms 18 days ago 694th Schmitt-Very-Cool 573 86 10ms 15 days ago 695th MeWhenI 🇻🇦 573 111 16ms 21 days ago 696th Schmitt-Very-Cool 571 128 69ms 14 days ago 697th dokutan 567 110 68ms 7 days ago 698th HumanoidCPU 562 111 110ms 20 days ago 699th CaedenHarper 🇨🇦 557 121 10ms 20 days ago 700th bitsandbeyond 🇳🇱 551 107 4ms 16 Nov 2025 701st SirBogman 🇺🇸 548 59 5ms 17 days ago 702nd HumanoidCPU 545 88 264ms 19 days ago 703rd dokutan 545 134 692ms 9 days ago 704th Schmitt-Very-Cool 540 130 446ms 19 days ago 705th Schmitt-Very-Cool 540 142 27ms 15 days ago 706th emgordon154 538 79 3ms 26 days ago 707th dokutan 535 357 12ms 21 days ago 708th lacrosse 532 84 54ms 20 days ago 708th TheZwierzLF 🇵🇱 532 84 42ms 3 days ago 710th CLOStrophobic 🇮🇹 530 93 10ms 16 days ago 711th HumanoidCPU 528 95 76ms 21 days ago 712th aksyristos 526 85 52ms 16 days ago 713th aksyristos 526 146 27ms 16 days ago 714th Schmitt-Very-Cool 515 160 265ms 15 days ago 715th logalex8369 🇺🇸 513 96 10ms 37 hours ago 716th bitsandbeyond 🇳🇱 512 131 116ms 21 days ago 717th dokutan 510 116 3ms 9 days ago 718th ravnskjaer 🇩🇰 505 139 337ms 4 days ago 719th OllieBoyne 🇬🇧 503 98 12ms 8 days ago 720th aksyristos 500 165 248ms 16 days ago First Prev 641–720 of 1,081 Next Last