The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Billiards 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 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 Bytes Time Submitted 241st jared-hughes 774 179 11ms 22 Dec 2024 241st InigoK 🇺🇸 774 179 15ms 9 Oct 2025 243rd Shanethegamer 🇺🇸 770 166 517ms 2 Dec 2024 244th wobblybits 769 180 10ms 15 Aug 2025 245th emgordon154 769 246 276ms 25 Feb 2025 246th GolfingSuccess 🇬🇷 767 170 3ms 24 Nov 2024 247th sean-niemann 🇺🇸 762 254 4ms 23 Apr 2025 248th kg583 🇺🇸 762 269 77ms 7 days ago 249th GolfingSuccess 🇬🇷 761 117 2ms 24 Nov 2024 250th MeWhenI 🇻🇦 761 168 498ms 17 Apr 2025 251st emgordon154 759 247 307ms 17 Jan 2025 252nd albanian-laundromat 758 265 1,377ms 10 days ago 253rd GolfingSuccess 🇬🇷 757 68 67ms 24 Nov 2024 254th ahmetdemirag 🇨🇾 757 183 11ms 5 Apr 2025 255th AlephSquirrel 756 169 625ms 5 Dec 2024 255th commandz0 🇺🇸 756 169 557ms 1 Sep 2025 257th MostParsingVex 756 256 3ms 18 Jan 2025 258th GolfingSuccess 🇬🇷 753 192 11ms 3 Jan 2025 259th Shanethegamer 🇺🇸 753 205 426ms 4 Jun 2025 260th SirBogman 🇺🇸 752 170 699ms 19 Jul 2025 261st stefangimmillaro 748 253 259ms 2 Dec 2024 262nd duckyluuk 🇳🇱 747 171 637ms 2 Jul 2025 262nd CaedenHarper 🇨🇦 747 171 686ms 16 Oct 2025 264th weliveinhell 🇭🇹 747 251 287ms 14 Dec 2024 265th MostParsingVex 747 277 69ms 3 Dec 2024 266th stefangimmillaro 746 213 468ms 2 Dec 2024 266th sean-niemann 🇺🇸 746 213 406ms 8 Dec 2024 268th CutSandstone 745 186 14ms 21 Dec 2024 269th MostParsingVex 744 227 4ms 19 Dec 2024 270th SirBogman 🇺🇸 742 66 32ms 18 Jul 2025 271st emgordon154 741 175 144ms 1 Dec 2024 272nd amberzit 741 187 14ms 6 Jul 2025 272nd WillConker 741 187 11ms 14 Dec 2025 274th Heathcorp 🇦🇺 737 188 11ms 31 Jan 2026 275th sean-niemann 🇺🇸 736 121 2ms 8 Dec 2024 276th albanian-laundromat 735 174 660ms 30 Nov 2025 277th SirBogman 🇺🇸 733 142 345ms 16 Jul 2025 278th plcc0 733 189 363ms 25 days ago 279th albanian-laundromat 731 283 59ms 12 Feb 2026 280th sean-niemann 🇺🇸 730 175 541ms 18 Aug 2025 281st Natanaelel 🇸🇪 729 196 145ms 2 Dec 2024 282nd cros107 🇦🇺 721 192 38ms 28 Nov 2025 283rd MeWhenI 🇻🇦 720 228 45ms 9 May 2025 284th albanian-laundromat 719 201 17ms 10 days ago 285th edsrzf 🇳🇿 719 208 2,850ms 8 Jul 2025 286th m-tkach 🇺🇦 718 193 21ms 6 Dec 2024 287th Shanethegamer 🇺🇸 718 199 148ms 2 Dec 2024 288th emgordon154 714 174 6ms 27 Dec 2024 289th neihousaigaai 714 194 10ms 2 Dec 2024 289th lelbal 714 194 10ms 7 Mar 2025 291st lifthrasiir 🇰🇷 713 165 10ms 26 Nov 2024 292nd sean-niemann 🇺🇸 713 180 18ms 8 Dec 2024 293rd lifthrasiir 🇰🇷 708 267 249ms 1 Dec 2024 294th Shanethegamer 🇺🇸 704 209 10ms 3 Dec 2024 295th Artemis21 🇬🇧 703 197 21ms 2 Jan 2025 296th Natanaelel 🇸🇪 700 70 35ms 19 Dec 2024 297th Shanethegamer 🇺🇸 700 254 43ms 3 Dec 2024 298th MeWhenI 🇻🇦 696 213 239ms 29 Apr 2025 299th CaedenHarper 🇨🇦 692 170 12ms 23 Aug 2025 300th CaedenHarper 🇨🇦 689 266 389ms 6 days ago 301st Shanethegamer 🇺🇸 686 138 658ms 1 Dec 2024 302nd guilhem-roy 🇫🇷 686 202 13ms 29 May 2025 303rd SirBogman 🇺🇸 683 118 153ms 15 Jul 2025 304th CatsAreFluffy 682 120 57ms 9 Dec 2024 305th tomtheisen 🇺🇸 682 233 383ms 28 Jan 2025 306th KasperKivimaeki 🇫🇮 682 275 277ms 10 Oct 2025 307th CaedenHarper 🇨🇦 679 223 448ms 2 Dec 2025 308th prplz 🇦🇺 676 205 21ms 31 Jan 2025 309th CaedenHarper 🇨🇦 676 235 432ms 16 Oct 2025 310th Shanethegamer 🇺🇸 673 216 17ms 5 Dec 2024 311th emgordon154 671 230 419ms 3 Dec 2024 312th solisolu 669 207 11ms 9 days ago 313th CaedenHarper 🇨🇦 662 197 3ms 2 Dec 2025 314th albanian-laundromat 658 303 30ms 10 days ago 315th Natanaelel 🇸🇪 652 69 2ms 2 Dec 2024 316th snoozingnewt 🇨🇦 645 270 134ms 22 Dec 2025 317th DialFrost 🇸🇬 644 215 28ms 1 Dec 2024 318th DanS1024 638 217 10ms 3 Dec 2024 319th Lv0Sys 🇵🇱 635 218 15ms 22 Feb 2026 320th FortuiteMan 🇫🇷 629 220 12ms 7 Jan 2026 First Prev 241–320 of 510 Next Last