The Calendar hole will go live in approximately 4 days. Why not try and solve it ahead of time?
Sudoku 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 241st InigoK 🇺🇸 576 505 167ms 9 Oct 2025 242nd MeWhenI 🇻🇦 576 573 426ms 27 Oct 2022 243rd yzhs 🇩🇪 576 647 288ms 27 Jul 2021 244th orthoplex 🇨🇽 574 532 3ms 31 Aug 2019 245th MeWhenI 🇻🇦 573 543 402ms 21 Dec 2022 246th MeWhenI 🇻🇦 573 719 17ms 1 Oct 2021 247th cakular 572 508 21ms 19 May 2024 248th SniperSmiley 🇺🇸 571 509 69ms 18 Jul 2022 249th argusdusty 🇺🇸 569 511 43ms 25 Mar 2021 249th jacklynnepenick 569 511 49ms 17 Aug 2021 251st jakobkordez 🇸🇮 568 512 32ms 2 Nov 2022 252nd MeWhenI 🇻🇦 568 644 4,335ms 12 Apr 2024 253rd commandblockguy 🇺🇸 564 515 14ms 3 Nov 2022 254th AlephSquirrel 564 812 849ms 27 Nov 2025 255th MeWhenI 🇻🇦 563 463 1,450ms 29 Jan 2023 256th Psirving 563 516 37ms 2 Aug 2020 257th amollberg 🇸🇪 562 517 27ms 20 Feb 2022 258th commandblockguy 🇺🇸 561 499 1,712ms 1 Sep 2025 259th Salutations45 560 536 21ms 27 Nov 2024 260th prplz 🇦🇺 556 523 432ms 13 Oct 2020 261st snoozingnewt 🇨🇦 555 524 37ms 20 Nov 2025 262nd MeWhenI 🇻🇦 554 804 481ms 1 Jan 2022 263rd annaproxy 551 528 3,258ms 30 Jan 2022 264th dokutan 549 857 27ms 7 hours ago 265th KatieLG 🇬🇧 547 531 61ms 19 Apr 2025 266th janAkali 🇷🇺 546 912 360ms 17 May 2025 267th MeWhenI 🇻🇦 545 839 32ms 17 Nov 2021 268th snoozingnewt 🇨🇦 543 516 1,150ms 20 Nov 2025 269th Natanaelel 🇸🇪 542 491 1,454ms 1 Oct 2021 270th fynnkroeger 542 536 20ms 23 Jul 2021 271st andersk 🇺🇸 540 763 243ms 28 Nov 2022 272nd scpchicken 🇵🇼 539 484 883ms 28 Apr 2022 273rd wh3n3v3r 🇨🇿 536 542 76ms 14 Nov 2024 274th dgerblick 534 562 99ms 20 Sep 2022 275th OllieBoyne 🇬🇧 533 545 61ms 3 Feb 2021 276th blaztoma 🇱🇹 531 547 17ms 25 Nov 2025 277th tomh1012 531 566 12ms 25 Sep 2020 278th stefangimmillaro 531 978 57ms 24 May 2025 279th janbehrens 🇩🇪 530 567 347ms 17 Jun 2023 280th MeepMoop 529 778 5ms 9 Apr 2025 281st KatieLG 🇬🇧 528 531 1,034ms 19 Apr 2025 282nd ShiraJoseph 🇺🇸 523 574 35ms 5 May 2023 283rd elgan65536 520 793 291ms 6 Apr 2024 284th mokymok 🇺🇸 519 560 27ms 15 Dec 2021 284th ndren 519 560 55ms 26 Nov 2025 286th LeeCamp 518 561 1,483ms 22 Dec 2021 287th The-Wolfson 516 866 276ms 9 Feb 2025 288th SB-945 515 565 183ms 17 Jan 2024 289th two-bad 🇬🇧 515 583 12ms 25 Feb 2024 290th janbehrens 🇩🇪 513 567 248ms 17 Jun 2023 291st kistlerf 🇨🇭 512 568 73ms 19 May 2025 292nd frobinsonj 512 587 12ms 21 Aug 2019 293rd MeWhenI 🇻🇦 510 589 15ms 24 Sep 2021 294th RockOfStone 508 810 36ms 7 Mar 2024 295th QuincyNash 🇺🇸 506 575 3,502ms 4 Dec 2022 296th DarkTemplar5 505 576 18ms 6 Mar 2020 297th snoozingnewt 🇨🇦 503 618 233ms 21 Nov 2025 298th itsh01 502 598 14ms 10 Jul 2022 298th Larento 502 598 13ms 12 Oct 2023 300th janbehrens 🇩🇪 500 531 966ms 11 Jul 2023 301st Kacarott 🇦🇺 500 814 209ms 8 Aug 2025 302nd mbittner20 495 587 635ms 14 Apr 2025 303rd MaxElf999 494 588 11ms 29 Sep 2022 304th Lv0Sys 🇵🇱 493 590 25ms 25 days ago 305th BambooleanLogic 🇸🇪 492 611 12ms 19 Aug 2022 306th guilhem-roy 🇫🇷 491 592 18ms 7 Mar 2022 307th BREMAUCY 🇫🇷 487 597 18ms 4 Oct 2025 308th ly0va 486 598 43ms 8 Sep 2021 309th CaedenHarper 🇨🇦 484 852 295ms 4 Nov 2025 310th lukasmoellerch 482 623 55ms 18 Jul 2019 311th detrumi 🇳🇱 482 855 266ms 22 Oct 2020 312th madeforlosers 481 624 17ms 3 Nov 2025 313th kebal2 481 686 477ms 21 Nov 2021 314th KatieLG 🇬🇧 480 626 24ms 21 Sep 2022 315th adamnielson42 🇺🇸 479 607 138ms 27 Nov 2023 315th croc54 479 607 25ms 14 Dec 2024 317th retrohun 476 611 36ms 4 Jun 2022 317th yousefalizadeh 476 611 15ms 8 Oct 2024 319th MeWhenI 🇻🇦 473 601 967ms 26 May 2022 320th thisishowmymindworks 🇳🇴 469 641 15ms 16 May 2023 First Prev 241–320 of 556 Next Last
