The Calendar hole will go live in approximately 9 days. Why not try and solve it ahead of time?
N Queens 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 161st lifthrasiir 🇰🇷 772 96 27ms 21 Nov 2024 161st emgordon154 772 96 13ms 10 Nov 2025 163rd Natanaelel 🇸🇪 770 73 1,818ms 3 May 2024 164th xsot 🇸🇬 770 132 2ms 9 May 2025 164th KasperKivimaeki 🇫🇮 770 132 2ms 14 days ago 166th SirBogman 🇺🇸 769 138 224ms 20 May 2024 167th FlorianCassayre 🇫🇷 764 97 48ms 14 May 2024 168th emgordon154 761 129 576ms 26 Oct 2025 169th dokutan 759 124 501ms 1 Jul 2024 170th Shanethegamer 🇺🇸 758 165 495ms 25 Aug 2025 171st stefangimmillaro 756 172 121ms 3 Jan 2025 172nd SirBogman 🇺🇸 755 53 1,097ms 2 May 2024 173rd sean-niemann 🇺🇸 752 164 4ms 8 Oct 2024 174th DialFrost 🇸🇬 749 99 58ms 5 May 2024 174th plcc0 749 99 37ms 4 Oct 2025 176th sean-niemann 🇺🇸 749 167 417ms 2 May 2024 177th lifthrasiir 🇰🇷 747 95 369ms 2 Dec 2024 178th blaztoma 🇱🇹 746 83 118ms 2 days ago 179th tomtheisen 🇺🇸 746 166 387ms 11 Feb 2025 180th anter69 🇭🇺 741 100 76ms 16 Oct 2024 181st MostParsingVex 741 168 1,537ms 21 May 2024 182nd sean-niemann 🇺🇸 739 194 270ms 6 May 2024 183rd ovs-code 🇩🇪 737 84 125ms 3 May 2024 183rd nwellnhof 🇩🇪 737 84 214ms 8 May 2024 185th GolfingSuccess 🇬🇷 736 169 546ms 1 May 2024 186th stefangimmillaro 736 212 43ms 29 May 2025 187th ovs-code 🇩🇪 735 79 1,574ms 1 May 2024 188th MostParsingVex 734 101 373ms 22 Jul 2024 188th albanian-laundromat 734 101 19ms 16 Sep 2025 188th BREMAUCY 🇫🇷 734 101 48ms 4 Oct 2025 188th snoozingnewt 🇨🇦 734 101 57ms 21 Nov 2025 192nd Alex-x90 🇺🇸 731 139 2ms 6 May 2024 193rd Yewzir 🇧🇪 729 304 1,745ms 17 May 2024 194th dokutan 727 102 30ms 22 Jun 2024 194th KatieLG 🇬🇧 727 102 35ms 25 May 2025 194th ndren 727 102 37ms 15 Jul 2025 197th edsrzf 🇳🇿 727 119 75ms 25 Aug 2025 198th a6166231 🇨🇳 726 120 11ms 18 Jun 2025 199th KasperKivimaeki 🇫🇮 723 172 468ms 14 days ago 200th sean-niemann 🇺🇸 722 193 454ms 24 Sep 2025 201st rucin93 🇵🇱 721 97 138ms 28 Dec 2024 202nd Natanaelel 🇸🇪 720 86 190ms 2 May 2024 203rd vgamula 🇺🇦 720 103 21ms 13 May 2024 203rd 4atj 720 103 474ms 30 Jun 2025 205th sean-niemann 🇺🇸 716 142 2ms 2 May 2024 206th saito-ta 🇯🇵 715 211 898ms 15 May 2024 207th sean-niemann 🇺🇸 715 229 26ms 7 May 2024 208th tayloia 🇬🇧 714 122 11ms 16 May 2024 209th 5cw 🇺🇸 713 104 306ms 3 May 2024 209th Babafaba 713 104 55ms 25 Oct 2025 211th olleicua 🇺🇸 712 87 39ms 5 May 2024 212th rucin93 🇵🇱 711 196 414ms 24 Sep 2025 213th m-tkach 🇺🇦 710 100 713ms 6 May 2024 213th MostParsingVex 710 100 634ms 22 Jul 2024 215th sean-niemann 🇺🇸 709 161 10ms 17 May 2024 216th ovs-code 🇩🇪 706 99 139ms 3 Aug 2024 217th jatloe 706 105 36ms 11 May 2024 218th stefangimmillaro 704 88 74ms 5 May 2024 219th emgordon154 703 101 438ms 14 Apr 2025 219th albanian-laundromat 703 101 404ms 24 Sep 2025 219th snoozingnewt 🇨🇦 703 101 477ms 21 Nov 2025 222nd jared-hughes 703 124 16ms 3 May 2024 223rd ovs-code 🇩🇪 703 142 758ms 12 Sep 2024 224th SirBogman 🇺🇸 701 63 70ms 8 Jun 2025 225th JohandeRuiter 🇳🇱 701 145 2ms 10 Jul 2024 226th ovs-code 🇩🇪 700 50 1,882ms 26 Jul 2025 227th MarcMush 🇫🇷 700 83 1,195ms 23 Nov 2024 228th madeforlosers 697 125 10ms 11 Apr 2025 229th plcc0 696 89 81ms 4 Oct 2025 230th dokutan 696 102 385ms 22 Jun 2024 231st sean-niemann 🇺🇸 696 178 359ms 20 Jun 2025 232nd rucin93 🇵🇱 694 187 122ms 2 May 2024 233rd sean-niemann 🇺🇸 694 194 55ms 20 Oct 2025 234th Lv0Sys 🇵🇱 691 126 10ms 12 days ago 235th albanian-laundromat 691 195 43ms 8 Sep 2025 236th KatieLG 🇬🇧 689 103 385ms 6 Oct 2025 237th heanyang1 689 154 158ms 28 May 2025 238th rucin93 🇵🇱 689 208 300ms 1 May 2024 239th KatieLG 🇬🇧 688 90 102ms 2 Oct 2025 240th AlephSquirrel 688 182 45ms 23 Jan 2025 First Prev 161–240 of 1,011 Next Last