The Calendar hole will go live in approximately 13 days. Why not try and solve it ahead of time?
Tic-tac-toe 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 481st iczelia 🇩🇪 450 159 13ms 25 Oct 2025 482nd msbranicky 449 185 4,430ms 2 Feb 2025 483rd HumanoidCPU 447 160 13ms 21 Feb 2025 484th Fracture17 444 156 12ms 12 Feb 2025 484th robin-scragg 444 156 13ms 11 Jul 2025 486th aditsu 442 188 4,650ms 10 Aug 2025 487th bobbysq 441 157 15ms 4 Mar 2025 487th klixel 🇨🇦 441 157 18ms 19 Jul 2025 489th Ripick 441 205 356ms 15 Apr 2025 490th starfihs 439 158 18ms 10 Feb 2025 491st kirjavascript 439 163 12ms 14 Feb 2025 492nd kmathis22 437 236 671ms 11 hours ago 493rd weliveinhell 🇭🇹 431 166 20ms 18 Jun 2025 494th croc54 430 161 14ms 31 Jan 2025 495th maxgodfrey2004 🇨🇦 425 267 93ms 14 Feb 2025 496th snoozingnewt 🇨🇦 424 218 114ms 27 days ago 497th acollett89 418 171 11ms 14 Jul 2025 498th noanabeshima 417 166 13ms 9 Jul 2025 498th yokasuretsu 417 166 14ms 11 Jul 2025 500th CutSandstone 413 168 19ms 30 Jan 2025 500th sciencejiho 413 168 18ms 10 Feb 2025 500th dirckvdende 413 168 14ms 17 Jul 2025 503rd JOrE20 🇺🇸 411 174 13ms 16 days ago 504th jameswmccarty 410 169 15ms 9 Feb 2025 505th CaedenHarper 🇨🇦 410 191 391ms 17 Oct 2025 506th madeforlosers 409 175 12ms 5 Nov 2025 507th hiichbindermax 408 170 14ms 5 Feb 2025 508th CaedenHarper 🇨🇦 406 331 301ms 2 Nov 2025 509th Maltaran 🇵🇱 404 233 3ms 14 Feb 2025 510th dokutan 403 194 341ms 1 Feb 2025 511th YAJUE114514 401 173 14ms 30 Jul 2025 511th aalec 401 173 13ms 8 Nov 2025 513th Waffle3z 397 231 3ms 7 Feb 2025 514th nstearns96 🇬🇧 396 175 17ms 4 Feb 2025 515th blaztoma 🇱🇹 396 215 160ms 20 days ago 516th NerdyMcNerd42 394 176 17ms 20 Feb 2025 517th jerrandolph 393 342 307ms 24 Sep 2025 518th HumanoidCPU 392 177 18ms 26 Jan 2025 519th tomh1012 389 201 330ms 12 Sep 2025 520th CarsonChr 🇺🇸 387 179 15ms 31 Jan 2025 521st madex 🇩🇪 385 128 64ms 31 Jan 2025 522nd yoshykai 385 268 506ms 30 Mar 2025 523rd gastropner 383 181 21ms 10 Feb 2025 524th snoozingnewt 🇨🇦 381 192 129ms 16 Sep 2025 525th JRaspass 🇬🇧 375 119 4ms 3 Feb 2025 526th StefanHabel 🇨🇦 373 186 12ms 14 Feb 2025 527th aliakseikalosha 373 210 373ms 22 Jun 2025 528th adamnielson42 🇺🇸 371 187 13ms 10 Feb 2025 529th HumanoidCPU 367 173 436ms 26 Jan 2025 530th madex 🇩🇪 367 353 318ms 28 Jan 2025 531st Alban-Boissard 365 190 15ms 14 Jun 2025 532nd davidludwik2370 363 191 13ms 31 Jul 2025 532nd To5BG 363 191 15ms 16 Nov 2025 534th KatieLG 🇬🇧 357 138 67ms 19 Oct 2025 535th scpchicken 🇵🇼 357 194 18ms 14 Aug 2025 535th michaelhodel 357 194 14ms 16 Nov 2025 537th msbranicky 355 195 15ms 1 Feb 2025 538th zakariamouhid 347 206 14ms 8 Mar 2025 539th dokutan 346 328 4,188ms 28 Apr 2025 540th AstroOrbis 345 201 21ms 13 Jul 2025 541st viv511 343 274 2ms 7 Feb 2025 542nd ereztaiar 🇮🇱 340 395 299ms 8 Apr 2025 543rd CaedenHarper 🇨🇦 339 334 80ms 12 Sep 2025 544th blaztoma 🇱🇹 338 224 7ms 22 Sep 2025 545th MeWhenI 🇻🇦 338 446 28ms 13 Mar 2025 546th CaedenHarper 🇨🇦 336 213 12ms 23 Aug 2025 547th Schmitt-Very-Cool 336 307 635ms 3 Oct 2025 548th Flekay 🇩🇪 335 207 15ms 10 Jul 2025 549th gigaprofisi 🇺🇸 330 217 13ms 4 Nov 2025 550th KatieLG 🇬🇧 330 428 14ms 27 Jun 2025 551st RedzGoose 🇦🇺 328 211 19ms 10 Feb 2025 552nd aksyristos 324 214 13ms 21 Mar 2025 552nd TheZwierzLF 🇵🇱 324 214 14ms 29 May 2025 554th HumanoidCPU 322 292 3ms 5 Jun 2025 555th yhm138 321 216 15ms 16 Feb 2025 556th mbittner20 319 217 18ms 24 Feb 2025 556th aaardwark 319 217 22ms 31 May 2025 558th EthanJantz 312 222 14ms 10 Aug 2025 559th Chinay-Domitrix 🇺🇸 312 266 4,702ms 6 Apr 2025 560th adaGrad1 311 223 15ms 3 Aug 2025 First Prev 481–560 of 673 Next Last