The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 35 hours. Why not try and solve them ahead of time?
Number Spiral 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 801st blaztoma 🇱🇹 418 128 36ms 15 Oct 2025 802nd KingSkyrock 🇺🇸 418 194 10ms 6 Nov 2022 803rd bac0id 418 214 1ms 22 Sep 2023 804th MeWhenI 🇻🇦 416 206 1ms 11 Oct 2023 805th jgbaldwinbrown 416 215 1ms 29 Jun 2022 806th HumanoidCPU 416 319 37ms 9 Mar 2025 807th dokutan 415 165 780ms 10 Dec 2025 808th ravnskjaer 🇩🇰 415 280 444ms 15 Dec 2025 809th error256 409 190 77ms 5 Feb 2025 810th CedricGebistorf 408 154 9ms 3 Mar 2022 810th sleepyStick 408 154 16ms 14 Mar 2022 812th codewrite 🇬🇧 407 250 416ms 18 Jan 2026 813th iczelia 🇩🇪 405 244 123ms 19 Oct 2025 814th yoshykai 405 287 473ms 8 Apr 2025 814th Schmitt-Very-Cool 405 287 514ms 3 Oct 2025 816th mrmena 🇦🇺 405 328 37ms 28 Mar 2024 817th matejmatik123 🇸🇰 404 275 1,404ms 1 Oct 2025 818th bwat2 404 288 424ms 8 Mar 2022 819th b10011 🇫🇮 403 156 9ms 11 Jan 2023 819th TaserTheFox 🇺🇸 403 156 15ms 1 May 2023 821st dokutan 403 280 441ms 27 Dec 2025 822nd Waffle3z 403 310 1ms 12 May 2022 822nd DaCuteRaccoon 403 310 1ms 15 May 2022 822nd KatieLG 🇬🇧 403 310 1ms 22 May 2022 822nd KatieLG-Transpiler 🇬🇧 403 310 1ms 24 Jun 2022 822nd HumanoidCPU 403 310 1ms 21 May 2024 822nd CaedenHarper 🇨🇦 403 310 1ms 16 Aug 2025 822nd snoozingnewt 🇨🇦 403 310 1ms 9 Oct 2025 829th retrohun 403 329 36ms 28 Dec 2022 829th msbranicky 403 329 36ms 21 Sep 2023 831st denkyuu1 402 133 37ms 25 Feb 2026 832nd edsrzf 🇳🇿 402 220 5ms 30 Oct 2024 833rd neihousaigaai 401 157 10ms 17 Apr 2022 834th Mabeloid 🇳🇴 401 311 1ms 4 Oct 2024 835th blaztoma 🇱🇹 399 195 76ms 6 hours ago 836th msbranicky 399 313 1ms 20 Sep 2023 837th MeWhenI 🇻🇦 397 154 254ms 15 Feb 2023 838th HumanoidCPU 397 191 846ms 27 Dec 2025 839th Shanethegamer 🇺🇸 396 173 69ms 16 Dec 2024 840th crizin 🇰🇷 394 295 451ms 9 Sep 2023 841st olleicua 🇺🇸 393 136 35ms 15 Feb 2024 842nd HumanoidCPU 393 305 3ms 12 Dec 2024 842nd dokutan 393 305 3ms 12 Dec 2024 842nd KatieLG 🇬🇧 393 305 3ms 3 Jan 2025 842nd Shanethegamer 🇺🇸 393 305 3ms 13 Jan 2025 842nd BREMAUCY 🇫🇷 393 305 4ms 14 Jan 2025 842nd CaedenHarper 🇨🇦 393 305 3ms 16 Aug 2025 848th KatieLG 🇬🇧 392 464 1,722ms 13 Sep 2025 849th celiendonze 🇨🇭 391 161 9ms 16 Jun 2023 850th LukeBridges 🇬🇧 391 207 11ms 27 Oct 2022 851st KatieLG 🇬🇧 391 306 2ms 24 Sep 2022 851st JRaspass 🇬🇧 391 306 2ms 24 Sep 2022 851st KatieLG-Transpiler 🇬🇧 391 306 3ms 26 Sep 2022 851st retrohun 391 306 3ms 28 Dec 2022 851st Shanethegamer 🇺🇸 391 306 2ms 1 Mar 2023 851st Mabeloid 🇳🇴 391 306 2ms 4 Oct 2024 851st ehulinsky 🇺🇸 391 306 3ms 29 Mar 2025 851st CaedenHarper 🇨🇦 391 306 2ms 16 Aug 2025 859th MeWhenI 🇻🇦 391 345 25ms 25 Jan 2022 859th KatieLG 🇬🇧 391 345 25ms 23 Mar 2024 859th CaedenHarper 🇨🇦 391 345 24ms 16 Aug 2025 859th JOrE20 391 345 28ms 14 Feb 2026 863rd alphafalfa 390 187 2ms 26 Nov 2024 864th emgordon154 390 261 422ms 13 days ago 865th olleicua 🇺🇸 390 307 4ms 9 Nov 2025 866th KatieLG-Transpiler 🇬🇧 390 346 24ms 24 Jun 2022 867th msbranicky 389 278 1ms 28 Sep 2023 868th nemoyatpeace 388 162 10ms 16 Jan 2026 869th juliansiebert 🇩🇪 387 186 298ms 4 Aug 2022 870th MattShaile 386 210 9ms 26 Apr 2022 871st CatsAreFluffy 384 233 2ms 12 Feb 2023 872nd DaCuteRaccoon 384 335 289ms 15 May 2022 873rd georgehulme 383 164 16ms 28 Jan 2022 873rd adamnielson42 🇺🇸 383 164 16ms 22 Nov 2023 873rd TheSecondComing123 383 164 10ms 4 Feb 2026 876th Jacob385 383 304 460ms 24 Jul 2024 877th jacklynnepenick 381 165 16ms 15 Feb 2022 878th adamnielson42 🇺🇸 381 640 10ms 1 May 2023 879th lukashert 380 306 430ms 28 Feb 2023 880th retrohun 380 355 24ms 28 Dec 2022 First Prev 801–880 of 1,786 Next Last
