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?
Ten-pin Bowling 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 481st coreynash 340 288 13ms 12 Mar 2024 482nd Babafaba 339 246 424ms 4 Nov 2025 483rd dijs 338 290 11ms 1 Jan 2020 484th tatzyr 🇯🇵 337 193 42ms 26 Mar 2025 485th tomh1012 337 353 419ms 5 Jan 2026 486th knutae 🇳🇴 336 257 17ms 18 Jul 2021 486th jared-hughes 336 257 10ms 25 Mar 2022 488th CaedenHarper 🇨🇦 335 383 508ms 6 Oct 2025 489th za3k 333 259 10ms 19 Nov 2022 490th alemelis 332 224 1,144ms 5 Aug 2025 491st amollberg 🇸🇪 332 260 11ms 20 Jan 2024 492nd abailey2020 🇺🇸 332 993 10ms 27 Dec 2020 493rd andrewjc2000 331 261 10ms 16 Oct 2025 494th c0d3-4-F00d 🇩🇪 331 296 12ms 29 Sep 2021 495th dokutan 330 197 38ms 10 Sep 2025 496th marcin7Cd 329 262 11ms 4 Jan 2021 497th tobyLovick 327 264 11ms 29 Dec 2023 498th jared-hughes 326 199 37ms 19 Sep 2022 499th CaedenHarper 🇨🇦 325 256 637ms 13 Aug 2025 500th MeWhenI 🇻🇦 325 511 326ms 5 Jun 2021 501st Eolu 324 512 228ms 8 Apr 2021 502nd adamnielson42 🇺🇸 322 268 11ms 25 Apr 2023 503rd janbehrens 🇩🇪 322 1,023 11ms 2 Aug 2023 504th CaedenHarper 🇨🇦 320 270 31ms 13 Aug 2025 505th CaedenHarper 🇨🇦 320 372 423ms 17 Oct 2025 506th AlephSquirrel 319 261 615ms 21 Jan 2024 507th JRaspass 🇬🇧 317 174 4ms 1 Sep 2021 508th olleicua 🇺🇸 315 206 36ms 11 May 2024 509th abailey2020 🇺🇸 315 274 17ms 13 Dec 2020 510th AlephSquirrel 314 275 17ms 25 Dec 2022 511th TaserTheFox 🇺🇸 313 276 16ms 22 Aug 2023 512th AstroOrbis 309 279 11ms 25 Feb 2026 513th scpchicken 🇵🇼 307 182 163ms 6 Apr 2022 514th c0d3-4-F00d 🇩🇪 306 389 403ms 21 Dec 2021 515th KatieLG 🇬🇧 305 544 194ms 11 Jun 2021 516th Schmitt-Very-Cool 301 426 365ms 3 Oct 2025 517th KatieLG 🇬🇧 300 326 11ms 30 Oct 2022 518th Shanethegamer 🇺🇸 299 278 1,032ms 9 Dec 2021 519th MeWhenI 🇻🇦 299 349 7ms 17 Sep 2021 520th Natanaelel 🇸🇪 299 831 40ms 23 Feb 2026 521st KatieLG 🇬🇧 297 578 784ms 8 Jun 2021 522nd msbranicky 296 518 3ms 19 Oct 2023 523rd croc54 293 294 17ms 2 Feb 2025 524th janbehrens 🇩🇪 292 189 3ms 1 Jan 2022 525th Natanaelel 🇸🇪 290 297 16ms 25 Oct 2021 526th martinnorling 🇸🇪 288 300 11ms 1 Apr 2022 527th fischfood 288 430 4ms 8 Aug 2024 528th MeWhenI 🇻🇦 287 393 131ms 31 Mar 2024 529th alemelis 285 303 16ms 29 Aug 2024 530th KatieLG 🇬🇧 282 370 8ms 21 May 2021 531st jake-freeman 281 349 10ms 3 Jun 2020 532nd LostSyntax21 🇬🇧 278 234 34ms 22 Feb 2026 533rd MeWhenI 🇻🇦 278 299 1,033ms 8 Mar 2023 534th jtaxen 278 310 11ms 31 May 2024 535th MeWhenI 🇻🇦 275 580 2ms 6 Aug 2021 536th MarcMush 🇫🇷 274 315 10ms 31 Jul 2024 537th KatieLG 🇬🇧 273 326 1,384ms 9 Oct 2022 538th madex 🇩🇪 273 1,207 12ms 13 days ago 539th emgordon154 272 297 89ms 14 Aug 2025 540th alemelis 272 306 646ms 28 Aug 2024 541st c0d3-4-F00d 🇩🇪 272 447 1ms 12 Jun 2023 542nd madex 🇩🇪 270 320 10ms 29 Jul 2025 543rd KatieLG 🇬🇧 269 477 526ms 3 Jun 2021 544th jared-hughes 269 922 43ms 28 Feb 2026 545th adoxography 267 243 37ms 6 Jan 2020 546th jchitel 265 369 9ms 25 Sep 2020 547th rak1507 🇬🇧 262 329 10ms 24 Oct 2021 548th perlebach 🇨🇿 260 212 4ms 17 Aug 2021 549th Waffle3z 257 253 37ms 7 Feb 2021 550th TimCurwick 🇺🇸 257 331 281ms 22 Oct 2020 551st galloj 🇨🇿 248 348 10ms 4 Sep 2022 552nd xkacer 🇨🇿 247 349 17ms 30 Jan 2021 553rd alangodfrey 247 350 11ms 1 Oct 2019 554th KatieLG 🇬🇧 246 503 5ms 7 Feb 2023 555th mathisfun271 245 352 11ms 8 Mar 2024 556th vonKrafft 243 510 5ms 26 Mar 2020 557th KatieLG 🇬🇧 242 491 439ms 7 May 2024 558th cure-honey 🇯🇵 241 807 43ms 7 Jul 2021 559th SB-945 238 1,385 11ms 23 Feb 2024 560th alexsave 235 417 12ms 19 Jan 2026 First Prev 481–560 of 637 Next Last
