The Calendar hole will go live in approximately 13 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 HumanoidCPU 620 85 90ms 19 days ago 642nd HumanoidCPU 619 105 111ms 19 days ago 643rd albanian-laundromat 616 82 5ms 22 days ago 644th dokutan 615 73 228ms 20 days ago 645th MeWhenI 🇻🇦 615 76 7ms 25 days ago 646th IISResetMe 615 78 278ms 18 days ago 647th albanian-laundromat 615 99 2ms 18 days ago 648th HumanoidCPU 613 72 9ms 19 days ago 648th olleicua 🇺🇸 613 72 10ms 10 days ago 650th JOrE20 🇺🇸 613 102 43ms 20 days ago 651st tomh1012 613 104 415ms 16 days ago 652nd themoonisacheese 612 82 11ms 9 days ago 653rd HumanoidCPU 608 121 407ms 18 days ago 654th anter69 🇭🇺 607 77 809ms 12 days ago 655th AlephSquirrel 607 79 271ms 17 days ago 656th HumanoidCPU 607 105 404ms 19 days ago 657th MeWhenI 🇻🇦 605 100 6ms 24 days ago 658th anter69 🇭🇺 604 74 33ms 12 days ago 658th D-MOVE 🇵🇭 604 74 46ms 9 days ago 660th RDShah 604 83 11ms 16 days ago 661st MeWhenI 🇻🇦 602 111 125ms 24 days ago 662nd Schmitt-Very-Cool 600 127 10ms 12 days ago 663rd CaedenHarper 🇨🇦 599 88 107ms 18 days ago 664th HumanoidCPU 598 74 130ms 19 days ago 665th CatsAreFluffy 597 67 51ms 30 Oct 2025 666th Nicronmil 597 74 9ms 7 days ago 666th two-bad 🇬🇧 597 74 10ms 23 hours ago 668th olleicua 🇺🇸 596 75 54ms 10 days ago 669th MeWhenI 🇻🇦 595 74 100ms 24 days ago 670th HumanoidCPU 595 107 9ms 19 days ago 671st CaedenHarper 🇨🇦 592 81 240ms 18 days ago 672nd zgialor-lab 590 85 28ms 42 hours ago 673rd BREMAUCY 🇫🇷 590 141 260ms 16 days ago 674th KatieLG 🇬🇧 589 108 8ms 17 days ago 675th Yewzir 🇧🇪 585 82 285ms 18 days ago 676th aksyristos 585 83 2ms 15 days ago 677th BREMAUCY 🇫🇷 585 109 461ms 17 days ago 678th Schmitt-Very-Cool 583 86 10ms 13 days ago 679th Protothor 581 76 9ms 14 days ago 680th albanian-laundromat 578 104 1,258ms 30 Oct 2025 681st Maashau 575 106 2ms 17 days ago 682nd SwordF-Official 574 92 2ms 16 Nov 2025 682nd HumanoidCPU 574 92 2ms 19 days ago 684th BREMAUCY 🇫🇷 573 78 38ms 17 days ago 685th MeWhenI 🇻🇦 573 111 16ms 20 days ago 686th Schmitt-Very-Cool 571 128 69ms 12 days ago 687th bitsandbeyond 🇳🇱 563 71 51ms 7 Nov 2025 688th CaedenHarper 🇨🇦 557 121 10ms 18 days ago 689th bitsandbeyond 🇳🇱 551 107 4ms 16 Nov 2025 690th SirBogman 🇺🇸 548 59 5ms 15 days ago 691st HumanoidCPU 545 88 264ms 18 days ago 692nd Schmitt-Very-Cool 540 130 446ms 17 days ago 693rd Schmitt-Very-Cool 540 142 27ms 13 days ago 694th CLOStrophobic 🇮🇹 539 93 10ms 14 days ago 695th emgordon154 538 79 3ms 24 days ago 696th dokutan 535 357 12ms 20 days ago 697th lacrosse 532 84 54ms 18 days ago 697th TheZwierzLF 🇵🇱 532 84 42ms 45 hours ago 699th HumanoidCPU 528 95 76ms 19 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 13 days ago 703rd OllieBoyne 🇬🇧 512 98 12ms 6 days ago 704th bitsandbeyond 🇳🇱 511 131 116ms 19 days ago 705th ravnskjaer 🇩🇰 505 139 337ms 3 days ago 706th aksyristos 505 165 248ms 15 days ago 707th bitsandbeyond 🇳🇱 503 126 3ms 31 Oct 2025 708th CaedenHarper 🇨🇦 497 94 7ms 19 days ago 709th MeWhenI 🇻🇦 487 80 32ms 24 days ago 710th CaedenHarper 🇨🇦 469 218 447ms 18 days ago 711th BREMAUCY 🇫🇷 465 165 27ms 15 days ago 712th HumanoidCPU 458 149 43ms 18 days ago 713th aksyristos 455 148 9ms 15 days ago 714th dokutan 454 175 96ms 5 days ago 715th dokutan 454 200 14ms 20 days ago 716th robbertvz 440 114 11ms 3 days ago 717th dokutan 439 161 67ms 5 days ago 718th Schmitt-Very-Cool 413 116 277ms 13 days ago 719th UnderKoen 🇳🇱 413 206 4ms 3 Nov 2025 720th dokutan 399 95 6ms 4 days ago First Prev 641–720 of 1,077 Next Last