The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 hours. Why not try and solve them ahead of time?
Zodiac Signs 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 CaedenHarper 🇨🇦 483 187 17ms 15 Aug 2025 482nd dokutan 483 296 43ms 27 Aug 2024 483rd billings7 🇬🇧 480 286 402ms 16 Jul 2022 483rd ericlangedijk 🇸🇮 480 286 437ms 21 May 2023 485th tobeannouncd 479 313 163ms 25 Apr 2025 486th dokutan 478 189 13ms 27 Apr 2025 487th Chinay-Domitrix 🇺🇸 477 242 2,579ms 14 days ago 488th CedricGebistorf 476 190 12ms 25 Jun 2022 489th MeWhenI 🇻🇦 474 229 10ms 6 Aug 2023 490th AlephSquirrel 472 179 159ms 2 Dec 2025 490th dokutan 472 179 138ms 23 Jan 2026 492nd BambooleanLogic 🇸🇪 471 209 13ms 28 Jul 2022 493rd p-vf 🇨🇭 471 291 412ms 9 Jul 2022 494th Natanaelel 🇸🇪 469 111 5ms 11 Jun 2022 495th CaedenHarper 🇨🇦 468 178 538ms 15 Aug 2025 496th LeeCamp 468 193 12ms 16 Jun 2022 497th celiendonze 🇨🇭 466 194 13ms 29 Mar 2023 498th MeWhenI 🇻🇦 462 489 25ms 1 Dec 2023 499th aglahir1 461 196 12ms 20 Jul 2022 500th ahmetdemirag 🇨🇾 459 197 14ms 19 Nov 2024 501st Pyroan 456 198 20ms 22 Jan 2026 502nd BREMAUCY 🇫🇷 456 372 3ms 8 Nov 2025 503rd CaedenHarper 🇨🇦 453 204 1,528ms 30 Sep 2025 504th Shanethegamer 🇺🇸 449 116 4ms 12 Dec 2022 505th KatieLG 🇬🇧 448 306 440ms 24 Oct 2022 506th KatieLG 🇬🇧 447 363 299ms 11 Jan 2023 507th MeWhenI 🇻🇦 446 276 25ms 13 Jun 2022 508th FortuiteMan 🇫🇷 445 270 15ms 19 Oct 2025 509th TheZwierzLF 🇵🇱 443 188 535ms 14 Dec 2025 509th dokutan 443 188 444ms 14 Feb 2026 511th CaedenHarper 🇨🇦 442 223 10ms 29 Aug 2025 512th tomh1012 440 385 5ms 13 Feb 2026 513th bac0id 438 319 433ms 4 Jul 2024 514th madex 🇩🇪 435 341 32ms 14 days ago 515th abt8601 🇹🇼 432 209 20ms 15 Jul 2022 515th mrnomm 432 209 11ms 12 Aug 2022 515th olleicua 🇺🇸 432 209 19ms 7 Nov 2025 518th janbehrens 🇩🇪 428 211 21ms 17 Jun 2023 519th bac0id 427 280 3ms 4 Jul 2024 520th plcc0 423 134 177ms 29 Dec 2025 521st MeWhenI 🇻🇦 423 347 38ms 12 Jun 2022 522nd bac0id 422 325 421ms 4 Jul 2024 523rd commandz0 🇺🇸 420 215 13ms 7 Sep 2022 524th quimey 416 217 14ms 13 Jul 2023 524th TheZwierzLF 🇵🇱 416 217 19ms 14 Dec 2025 526th bidger 415 401 449ms 16 Nov 2022 527th Bonjour27891 🇻🇳 414 218 14ms 15 Jul 2022 528th plcc0 413 126 4ms 29 Dec 2025 529th MeWhenI 🇻🇦 411 268 2ms 31 Dec 2022 530th cros107 🇦🇺 407 222 14ms 12 Nov 2025 531st Yax42 🇫🇷 404 296 3ms 9 Jan 2026 532nd AlexanderFair 403 224 12ms 20 Jul 2023 533rd msbranicky 403 403 287ms 31 Aug 2023 534th Shanethegamer 🇺🇸 402 141 162ms 1 Jul 2022 535th commandz0 🇺🇸 402 207 604ms 1 Sep 2025 536th adamnielson42 🇺🇸 398 227 12ms 25 Apr 2023 537th nephila-nacrea 🇬🇧 391 133 5ms 3 Jul 2023 538th HumanoidCPU 389 232 21ms 16 Nov 2025 539th amollberg 🇸🇪 388 233 24ms 10 Jan 2024 540th msbranicky 385 440 4ms 12 Aug 2023 541st jgbaldwinbrown 380 315 3ms 15 Sep 2022 542nd MeWhenI 🇻🇦 377 138 4ms 16 Apr 2023 543rd MeWhenI 🇻🇦 376 399 167ms 13 Jun 2022 544th MaxElf999 375 241 12ms 23 Sep 2022 544th TaserTheFox 🇺🇸 375 241 106ms 16 Mar 2023 544th codingisgreatbutiamnot 375 241 13ms 11 Jun 2025 547th msbranicky 372 451 118ms 8 Nov 2025 548th robin-scragg 370 244 20ms 11 Jul 2025 549th TheZwierzLF 🇵🇱 369 196 38ms 25 Dec 2025 550th null-tangent 369 267 11ms 1 Aug 2022 551st mbittner20 367 246 12ms 27 May 2023 552nd jhpaques 🇫🇷 366 247 19ms 29 Jul 2022 553rd dokutan 366 269 9ms 14 Jan 2026 554th HumanoidCPU 365 228 413ms 16 Nov 2025 555th ian-h-chamberlain 🇺🇸 362 508 251ms 14 Jun 2022 556th madex 🇩🇪 361 510 244ms 19 Jul 2024 557th JOrE20 359 536 64ms 13 Feb 2026 558th MeWhenI 🇻🇦 355 242 7ms 1 Oct 2022 559th null-tangent 352 472 474ms 2 Aug 2022 560th yzhs 🇩🇪 349 429 168ms 2 Jul 2023 First Prev 481–560 of 668 Next Last