The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 15 hours. 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 321st BREMAUCY 🇫🇷 564 153 17ms 4 Oct 2025 321st luuumine 🇫🇷 564 153 18ms 21 Oct 2025 323rd MeWhenI 🇻🇦 563 98 4ms 30 Jul 2025 324th MeWhenI 🇻🇦 562 197 85ms 8 Mar 2023 325th MeWhenI 🇻🇦 561 314 4ms 24 Jul 2023 326th MeWhenI 🇻🇦 558 443 9ms 7 Dec 2023 327th Natanaelel 🇸🇪 557 268 134ms 23 Feb 2026 328th MeWhenI 🇻🇦 556 231 444ms 8 Mar 2023 329th MeWhenI 🇻🇦 556 447 35ms 6 Jun 2023 330th acotis 555 299 289ms 13 Jan 2026 331st albanian-laundromat 554 155 1,554ms 26 Oct 2025 332nd stefangimmillaro 554 182 2,667ms 8 Dec 2024 333rd janbehrens 🇩🇪 553 215 375ms 1 Jan 2022 334th bizy-coder 552 151 488ms 2 Jan 2025 335th MeWhenI 🇻🇦 549 420 25ms 25 Jun 2022 336th antimon2 🇯🇵 547 136 504ms 17 Jul 2025 337th janbehrens 🇩🇪 547 250 63ms 20 Nov 2022 338th ndren 547 454 36ms 23 Feb 2026 339th ryyyn 🇺🇸 546 158 29ms 3 Feb 2026 340th MeWhenI 🇻🇦 545 227 4ms 4 Jul 2023 341st Yax42 🇫🇷 541 220 436ms 19 Nov 2025 342nd bricknellj 539 160 10ms 15 Nov 2022 343rd helbling 🇨🇭 538 182 12ms 12 Sep 2024 344th MeWhenI 🇻🇦 535 155 147ms 15 Apr 2025 345th scpchicken 🇵🇼 535 279 140ms 25 Feb 2023 346th lynn 535 310 180ms 1 Apr 2022 347th Shanethegamer 🇺🇸 530 435 25ms 28 Oct 2021 348th janbehrens 🇩🇪 528 230 1ms 21 Mar 2022 349th h3ra993huskp 🇯🇵 528 243 400ms 30 Nov 2025 350th MeWhenI 🇻🇦 527 315 1,354ms 8 Mar 2023 351st itsh01 524 187 9ms 4 Sep 2022 352nd janbehrens 🇩🇪 524 245 482ms 25 Mar 2022 353rd RaBa21 🇭🇺 523 165 10ms 31 Jul 2025 354th sean-niemann 🇺🇸 523 194 105ms 8 Jan 2025 355th btjones0 521 318 196ms 19 Jun 2022 356th jared-hughes 520 263 440ms 4 Aug 2022 357th YAJUE114514 520 287 128ms 30 Jul 2025 358th SB-945 517 167 12ms 21 Jan 2024 359th GrayJoKing 🇦🇺 515 161 148ms 13 Aug 2024 360th CaedenHarper 🇨🇦 515 167 1,575ms 20 Sep 2025 361st yuchuehw 514 168 17ms 11 Jan 2024 362nd emgordon154 512 197 2,797ms 26 Jul 2025 363rd Lv0Sys 🇵🇱 510 192 10ms 3 Dec 2025 364th emgordon154 509 163 148ms 26 Nov 2024 365th jared-hughes 509 239 2ms 4 Aug 2022 366th DialFrost 🇸🇬 509 252 489ms 24 Sep 2025 367th didion0 🇺🇸 507 193 11ms 9 Dec 2021 368th jkelly467 507 199 2,649ms 25 Feb 2026 369th lynn 504 296 122ms 22 Sep 2021 370th janbehrens 🇩🇪 503 255 424ms 1 Jan 2022 371st MeWhenI 🇻🇦 502 122 3ms 18 Jan 2022 372nd FlorianCassayre 🇫🇷 502 172 16ms 5 Aug 2025 373rd Shanethegamer 🇺🇸 500 196 10ms 3 Feb 2025 374th aksyristos 499 173 10ms 3 days ago 375th elisherer 🇮🇱 497 197 10ms 18 Jun 2019 376th MeWhenI 🇻🇦 497 204 37ms 8 Mar 2023 377th stefangimmillaro 492 132 33ms 4 May 2024 378th MichalMarsalek 🇨🇿 491 286 407ms 5 Nov 2022 379th annaproxy 490 176 11ms 1 Jan 2022 379th davecame 490 176 85ms 8 Nov 2023 379th robin-scragg 490 176 12ms 27 Aug 2025 379th blaztoma 🇱🇹 490 176 40ms 21 days ago 383rd Shanethegamer 🇺🇸 489 262 369ms 24 Sep 2025 384th yzhs 🇩🇪 488 306 140ms 1 Aug 2021 385th scpchicken 🇵🇼 487 201 10ms 8 Apr 2022 386th MeWhenI 🇻🇦 483 297 7ms 8 Mar 2023 387th Natanaelel 🇸🇪 481 135 36ms 5 Sep 2024 388th GrayJoKing 🇦🇺 478 184 80ms 29 Apr 2023 389th MeWhenI 🇻🇦 478 211 2,538ms 27 Oct 2024 390th albanian-laundromat 477 181 10ms 15 Apr 2025 391st bzijlema 🇳🇱 474 182 20ms 10 Jan 2024 392nd Andrey-Plotnikov 473 207 10ms 30 Sep 2025 393rd lynn 469 184 17ms 3 Feb 2023 394th KatieLG 🇬🇧 469 303 212ms 11 Jun 2021 395th janbehrens 🇩🇪 468 241 120ms 5 Aug 2021 396th MeWhenI 🇻🇦 468 328 15ms 18 Nov 2021 397th targrik 467 265 6ms 22 May 2025 398th JOrE20 466 185 11ms 24 Dec 2025 399th JOrE20 466 495 67ms 18 Feb 2026 400th LostSyntax21 🇬🇧 464 186 10ms 22 Feb 2026 First Prev 321–400 of 637 Next Last