The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Cubes 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 Shanethegamer 🇺🇸 527 276 1ms 25 Apr 2023 482nd inventshah 527 329 3ms 31 Aug 2022 483rd MeWhenI 🇻🇦 526 211 3ms 15 Apr 2023 484th elisherer 🇮🇱 525 226 12ms 8 Apr 2019 485th Natanaelel 🇸🇪 524 158 37ms 5 Oct 2021 486th prplz 🇦🇺 524 331 3ms 11 Oct 2019 486th jared-hughes 524 331 3ms 21 Nov 2023 488th detrumi 🇳🇱 524 370 176ms 21 Oct 2020 489th cahidenes 524 378 383ms 25 Apr 2021 490th splitlane 523 278 2ms 9 Mar 2023 491st MichalMarsalek 🇨🇿 522 181 9ms 15 Jan 2024 492nd two-bad 🇬🇧 522 227 11ms 9 Feb 2024 493rd dokutan 522 380 506ms 7 Dec 2025 494th Shanethegamer 🇺🇸 522 392 279ms 4 Feb 2021 495th jared-hughes 520 228 10ms 19 Jan 2023 496th aditsu 519 182 10ms 31 Dec 2019 497th Yewzir 🇧🇪 519 382 387ms 2 Oct 2025 498th janbehrens 🇩🇪 518 184 626ms 17 Jun 2023 499th madeforlosers 518 229 9ms 3 Nov 2025 500th lynn 517 183 10ms 11 Sep 2021 500th bizy-coder 517 183 21ms 12 Oct 2024 502nd stefangimmillaro 517 214 1,292ms 2 Nov 2022 503rd ILMTitan 516 333 390ms 21 Nov 2021 504th cbrt-x 516 384 456ms 29 Aug 2021 504th yoshykai 516 384 449ms 27 Mar 2025 506th KatieLG 🇬🇧 515 215 1,315ms 2 Nov 2022 507th hklemp 🇩🇪 515 334 381ms 21 Nov 2021 508th AbhayAravinda 515 337 3ms 28 Jul 2020 509th jared-hughes 514 184 10ms 16 Aug 2021 509th blaztoma 🇱🇹 514 184 10ms 8 days ago 511th DialFrost 🇸🇬 514 328 5ms 22 Dec 2023 512th Mabeloid 🇳🇴 513 338 3ms 21 Oct 2025 513th marcin7Cd 512 313 7ms 19 Apr 2021 514th Irratix 🇳🇱 512 371 3,798ms 30 Dec 2022 514th jared-hughes 512 371 1,444ms 30 Oct 2023 516th TobyBoyne 🇬🇧 511 185 10ms 14 Apr 2022 517th dokutan 510 187 776ms 20 Apr 2025 518th ravnskjaer 🇩🇰 510 389 494ms 15 Dec 2025 519th Natanaelel 🇸🇪 509 233 12ms 26 Dec 2021 519th fitzdotlol 🇺🇸 509 233 11ms 21 Mar 2022 521st annaproxy 509 359 16ms 13 Jan 2023 522nd Bulmenisaurus 508 186 9ms 13 Jul 2024 523rd Kloppermand 🇩🇰 507 339 413ms 7 Oct 2022 524th madex 🇩🇪 507 382 196ms 29 Jun 2025 525th uttumuttu 🇫🇮 505 235 10ms 6 Jan 2022 526th Betuaredead 505 376 631ms 11 Jan 2023 527th janbehrens 🇩🇪 504 220 3ms 9 Nov 2021 528th bzijlema 🇳🇱 503 188 10ms 29 Oct 2023 529th Irratix 🇳🇱 503 345 3ms 25 Dec 2021 529th madex 🇩🇪 503 345 3ms 29 Jun 2025 531st stefangimmillaro 502 165 35ms 22 May 2022 532nd SirFireball3521 500 189 11ms 24 Jan 2023 533rd KatieLG 🇬🇧 500 237 9ms 11 Oct 2022 533rd zakariamouhid 500 237 10ms 4 Jun 2023 535th hiddicop 🇸🇪 499 166 36ms 27 Jan 2021 535th Andriamanitra 🇫🇮 499 166 36ms 28 Jul 2023 537th Pimentero 🇷🇺 499 338 4ms 13 Nov 2023 538th M1kep 498 189 279ms 7 Jun 2020 539th targrik 498 238 11ms 8 Jun 2025 540th blaztoma 🇱🇹 496 167 34ms 21 Dec 2025 541st Shanethegamer 🇺🇸 496 223 1,212ms 28 Jul 2021 542nd Yewzir 🇧🇪 496 383 72ms 9 Feb 2024 543rd TheZwierzLF 🇵🇱 495 201 578ms 21 Nov 2025 544th Lv0Sys 🇵🇱 494 240 11ms 2 Dec 2025 545th IISResetMe 493 191 283ms 29 Dec 2025 546th KrausRaus 🇺🇸 493 225 3ms 3 Dec 2021 547th MeWhenI 🇻🇦 493 352 3ms 7 May 2023 548th coreynash 492 241 10ms 26 May 2023 549th jacobly0 🇺🇸 492 608 1,753ms 22 Apr 2024 550th stertooy 🇧🇪 490 193 10ms 14 Jun 2024 550th ahmetdemirag 🇨🇾 490 193 11ms 24 Jul 2024 552nd jackkav 490 242 11ms 4 Feb 2019 553rd MeWhenI 🇻🇦 490 388 88ms 8 May 2022 554th marcin7Cd 487 194 18ms 17 Dec 2020 555th archee303 487 356 3ms 5 Feb 2020 556th dzhang314 485 195 11ms 13 Aug 2019 557th AlephSquirrel 485 205 618ms 21 Jan 2024 557th Mabeloid 🇳🇴 485 205 701ms 20 Oct 2025 559th Yewzir 🇧🇪 485 358 3ms 9 Feb 2024 560th Lv0Sys 🇵🇱 484 197 400ms 2 Dec 2025 First Prev 481–560 of 1,698 Next Last
