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?
Time Distance 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 481st Bonjour27891 🇻🇳 687 321 12ms 21 Apr 2022 482nd Yewzir 🇧🇪 687 367 1,477ms 3 Aug 2023 483rd MeWhenI 🇻🇦 686 350 2ms 1 Dec 2022 484th Pianoman1 684 322 18ms 3 Jan 2026 485th varhammer 684 347 14ms 13 Dec 2023 486th dbut2 🇦🇺 684 436 317ms 17 Jul 2025 487th gravitypriest 683 283 11ms 18 Sep 2023 488th msbranicky 683 310 624ms 16 Jan 2024 489th TheDrawingCoder-Gamer 683 335 2ms 3 Jul 2025 490th b10011 🇫🇮 682 323 12ms 27 Jan 2023 490th mathieurodic 682 323 17ms 21 Oct 2025 492nd DialFrost 🇸🇬 681 363 480ms 24 Sep 2025 493rd brochmann 🇸🇪 680 324 18ms 13 Aug 2023 494th MeWhenI 🇻🇦 680 797 15ms 15 Nov 2023 495th scpchicken 🇵🇼 679 230 7ms 6 Jan 2023 496th BREMAUCY 🇫🇷 678 344 406ms 23 Jul 2025 497th MeWhenI 🇻🇦 676 337 5ms 6 Aug 2023 498th 5cw 🇺🇸 674 218 3ms 12 Apr 2023 499th dal548 674 327 11ms 12 Jun 2024 500th msbranicky 673 443 268ms 3 Oct 2023 501st KatieLG 🇬🇧 671 257 37ms 25 Dec 2023 502nd janbehrens 🇩🇪 671 286 262ms 29 May 2022 503rd Bodo171 670 329 12ms 8 Dec 2022 504th astdefu 670 376 573ms 11 Dec 2022 505th hellwue 668 330 11ms 15 Nov 2023 506th dokutan 666 357 8ms 3 Jul 2024 507th JRaspass 🇬🇧 665 235 50ms 10 Jun 2022 508th emgordon154 664 291 12ms 8 Aug 2024 509th vhoulbreque 🇫🇷 664 332 18ms 22 Aug 2022 510th Kaffeleif 664 358 9ms 21 Mar 2024 511th bac0id 663 373 423ms 26 Jun 2024 512th msbranicky 662 369 2,818ms 11 Jan 2025 513th MeWhenI 🇻🇦 661 350 150ms 31 hours ago 514th ericlangedijk 🇸🇮 661 353 404ms 11 Apr 2022 515th PhysicDev 🇫🇷 660 334 11ms 26 Jan 2024 516th TheZwierzLF 🇵🇱 658 335 44ms 20 May 2025 517th MeWhenI 🇻🇦 658 448 33ms 6 Jun 2023 518th aalec 656 336 19ms 25 Apr 2024 518th croc54 656 336 17ms 27 Jan 2025 520th djeedjay 🇳🇱 656 366 2ms 4 Nov 2023 521st targrik 653 310 6ms 1 Feb 2025 522nd emgordon154 653 323 10ms 19 Sep 2024 523rd janAkali 🇷🇺 653 356 405ms 11 Oct 2025 524th KatieLG 🇬🇧 653 568 8ms 28 May 2022 525th JOrE20 652 511 59ms 12 Feb 2026 526th Yewzir 🇧🇪 651 358 435ms 22 Dec 2024 527th CarsonChr 🇺🇸 650 339 18ms 18 Sep 2022 528th chartung17 648 340 12ms 10 Dec 2023 529th msbranicky 648 353 2ms 29 Sep 2023 530th MeWhenI 🇻🇦 648 392 42ms 4 Sep 2024 531st billings7 🇬🇧 644 362 427ms 23 May 2024 532nd bwat2 644 384 479ms 21 Apr 2022 533rd JRaspass 🇬🇧 644 463 318ms 20 May 2022 534th Shanethegamer 🇺🇸 641 329 7ms 22 Aug 2024 535th MeWhenI 🇻🇦 636 231 3ms 11 Apr 2022 536th emgordon154 636 316 170ms 24 Oct 2024 537th msbranicky 636 464 245ms 6 Oct 2023 538th ellis-rix 635 347 11ms 2 Mar 2023 538th quimey 635 347 13ms 24 Mar 2023 540th TheZwierzLF 🇵🇱 634 334 737ms 23 Nov 2025 541st Mabeloid 🇳🇴 634 379 3ms 14 Oct 2025 542nd MeWhenI 🇻🇦 633 325 461ms 12 Apr 2022 543rd adoxography 633 348 11ms 13 Jun 2023 544th msbranicky 632 331 485ms 15 Jan 2024 545th FortuiteMan 🇫🇷 632 349 18ms 30 Aug 2023 546th Chinay-Domitrix 🇺🇸 629 388 2,855ms 4 Nov 2025 547th KatieLG 🇬🇧 628 434 7ms 19 May 2024 548th emgordon154 626 308 1,329ms 20 Nov 2024 549th rucin93 🇵🇱 626 352 11ms 15 Jan 2024 550th Maashau 626 384 2ms 29 Nov 2025 551st jerrandolph 625 477 291ms 3 Nov 2023 552nd wh3n3v3r 🇨🇿 624 353 11ms 14 Nov 2024 553rd Mikey-Beep 🇬🇧 623 354 11ms 1 Jun 2024 553rd Babafaba 623 354 18ms 4 Nov 2025 555th MeWhenI 🇻🇦 622 251 7ms 16 Apr 2023 556th msbranicky 622 416 3ms 3 Oct 2023 557th yuchuehw 621 355 19ms 31 Jan 2024 557th alemelis 621 355 17ms 13 Sep 2024 559th rucin93 🇵🇱 619 342 659ms 21 Jan 2024 560th Florian-Mt 619 356 17ms 14 Jul 2024 First Prev 481–560 of 693 Next Last