The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Billiards 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript 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 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions 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 Multitap Input 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 161st Shanethegamer 🇺🇸 781 254 30ms 10 Feb 2026 162nd jared-hughes 781 323 9ms 22 Dec 2024 163rd Shanethegamer 🇺🇸 779 191 463ms 3 Dec 2024 164th MeWhenI 🇻🇦 779 343 1,750ms 13 Mar 2025 165th GolfingSuccess 🇬🇷 779 388 1,492ms 30 Jan 2025 166th GolfingSuccess 🇬🇷 776 194 435ms 24 Nov 2024 167th sean-niemann 🇺🇸 776 230 48ms 30 Nov 2024 168th Shanethegamer 🇺🇸 775 124 1,229ms 3 Dec 2024 169th sean-niemann 🇺🇸 771 168 3ms 29 Nov 2024 170th anter69 🇭🇺 766 84 59ms 24 Mar 2025 171st emgordon154 765 246 276ms 25 Feb 2025 172nd GolfingSuccess 🇬🇷 762 170 3ms 24 Nov 2024 173rd ovs-code 🇩🇪 759 131 10ms 1 Dec 2024 173rd nwellnhof 🇩🇪 759 131 10ms 16 Jul 2025 175th kg583 🇺🇸 758 269 77ms 6 days ago 176th emgordon154 756 247 307ms 17 Jan 2025 177th Artemis21 🇬🇧 755 124 22ms 10 Jan 2025 178th albanian-laundromat 755 265 1,377ms 9 days ago 179th GolfingSuccess 🇬🇷 754 117 2ms 24 Nov 2024 180th ovs-code 🇩🇪 753 117 667ms 1 Dec 2024 181st Shanethegamer 🇺🇸 749 205 426ms 4 Jun 2025 182nd sean-niemann 🇺🇸 748 86 38ms 5 Dec 2025 183rd GolfingSuccess 🇬🇷 748 192 11ms 3 Jan 2025 184th weliveinhell 🇭🇹 744 251 287ms 14 Dec 2024 185th stefangimmillaro 744 253 259ms 2 Dec 2024 186th MostParsingVex 743 277 69ms 3 Dec 2024 187th stefangimmillaro 742 213 468ms 2 Dec 2024 187th sean-niemann 🇺🇸 742 213 406ms 8 Dec 2024 189th SirBogman 🇺🇸 740 112 365ms 16 Jul 2025 190th MostParsingVex 739 227 4ms 19 Dec 2024 191st dokutan 736 228 5ms 26 Dec 2025 192nd AlephSquirrel 731 181 30ms 20 Jan 2025 193rd sean-niemann 🇺🇸 729 121 2ms 8 Dec 2024 194th SirBogman 🇺🇸 727 66 32ms 18 Jul 2025 195th edsrzf 🇳🇿 727 182 17ms 30 Sep 2025 196th albanian-laundromat 727 283 59ms 12 Feb 2026 197th Natanaelel 🇸🇪 725 196 145ms 2 Dec 2024 198th edsrzf 🇳🇿 723 228 6ms 20 days ago 199th MeWhenI 🇻🇦 716 228 45ms 9 May 2025 200th edsrzf 🇳🇿 715 208 2,850ms 8 Jul 2025 201st Shanethegamer 🇺🇸 714 199 148ms 2 Dec 2024 202nd albanian-laundromat 714 201 17ms 9 days ago 203rd albanian-laundromat 712 126 4,373ms 4 Aug 2025 204th Flekay 🇩🇪 710 132 12ms 15 Feb 2026 205th sean-niemann 🇺🇸 708 180 18ms 8 Dec 2024 206th targrik 705 141 11ms 27 Mar 2025 206th Lv0Sys 🇵🇱 705 141 12ms 22 Feb 2026 208th lifthrasiir 🇰🇷 705 267 249ms 1 Dec 2024 209th nwellnhof 🇩🇪 702 118 315ms 18 Jul 2025 210th CaedenHarper 🇨🇦 699 135 900ms 23 Oct 2025 211th Yax42 🇫🇷 695 143 11ms 12 Sep 2025 212th Shanethegamer 🇺🇸 692 149 5ms 5 Dec 2024 213th MeWhenI 🇻🇦 691 213 239ms 29 Apr 2025 214th saito-ta 🇯🇵 690 58 99ms 1 Dec 2024 215th KatieLG 🇬🇧 689 136 2,446ms 7 Jan 2026 216th Natanaelel 🇸🇪 686 70 35ms 19 Dec 2024 217th stefangimmillaro 686 145 11ms 2 Dec 2024 218th CaedenHarper 🇨🇦 686 266 389ms 5 days ago 219th tomtheisen 🇺🇸 679 233 383ms 28 Jan 2025 220th KasperKivimaeki 🇫🇮 679 275 277ms 10 Oct 2025 221st SirBogman 🇺🇸 675 118 153ms 15 Jul 2025 222nd CaedenHarper 🇨🇦 675 223 448ms 2 Dec 2025 223rd CaedenHarper 🇨🇦 673 235 432ms 16 Oct 2025 224th Salutations45 667 149 11ms 1 Dec 2024 225th emgordon154 667 230 419ms 3 Dec 2024 226th keelimeguy 🇺🇸 664 141 34ms 14 Jun 2025 227th emgordon154 663 150 12ms 1 Dec 2024 228th KatieLG 🇬🇧 659 136 2,888ms 7 Jan 2026 229th helbling 🇨🇭 658 151 11ms 27 Nov 2024 230th CaedenHarper 🇨🇦 658 197 3ms 2 Dec 2025 231st ovs-code 🇩🇪 656 61 113ms 6 Dec 2024 232nd albanian-laundromat 655 303 30ms 9 days ago 233rd Shanethegamer 🇺🇸 647 136 657ms 3 Dec 2024 234th edsrzf 🇳🇿 644 221 42ms 30 Dec 2024 235th MostParsingVex 644 256 3ms 18 Jan 2025 236th snoozingnewt 🇨🇦 642 270 134ms 22 Dec 2025 237th Natanaelel 🇸🇪 639 69 2ms 2 Dec 2024 238th ovs-code 🇩🇪 637 101 39ms 5 Dec 2024 239th luuumine 🇫🇷 633 148 12ms 21 Oct 2025 240th Shanethegamer 🇺🇸 633 209 10ms 3 Dec 2024 First Prev 161–240 of 505 Next Last