The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
π 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 881st MeWhenI 🇻🇦 570 61 12ms 15 Feb 2025 882nd Soyo-Wind 569 177 436ms 6 Nov 2025 883rd dokutan 569 239 243ms 1 Jul 2025 884th snoozingnewt 🇨🇦 568 79 937ms 21 Nov 2025 885th leon-w 568 100 57ms 4 Jan 2019 885th LlamaLad7 🇬🇧 568 100 21ms 17 Jan 2021 887th Lv0Sys 🇵🇱 566 257 270ms 11 days ago 888th dan-simon 565 67 263ms 29 Dec 2017 889th Yewzir 🇧🇪 563 259 5ms 19 Dec 2024 890th con-cs 560 104 12ms 15 Oct 2021 890th MattShaile 560 104 11ms 20 Mar 2022 890th goodwyna21 560 104 12ms 27 Jan 2025 893rd FnControlOption 559 53 168ms 23 Aug 2022 893rd katrina1232 559 53 172ms 7 Dec 2022 895th adriweb 🇫🇷 558 201 257ms 21 Aug 2023 896th potato-jackson 557 102 10ms 6 Sep 2021 896th wh3n3v3r 🇨🇿 557 102 21ms 20 Nov 2024 896th piano-miles 557 102 211ms 3 Aug 2025 899th MeWhenI 🇻🇦 556 144 788ms 21 Dec 2022 900th Yewzir 🇧🇪 556 217 775ms 3 Jan 2024 901st alex-oser 🇲🇰 555 105 12ms 18 Aug 2021 901st ShiraJoseph 🇺🇸 555 105 13ms 7 Jan 2023 903rd orthoplex 🇨🇽 555 370 2ms 9 Jun 2024 904th kmathis22 554 204 444ms 7 Dec 2025 905th MeWhenI 🇻🇦 554 231 134ms 6 Aug 2023 906th cure-honey 🇯🇵 552 257 138ms 7 Jul 2021 907th BREMAUCY 🇫🇷 551 114 1,247ms 17 Jun 2025 908th Vinterion 551 186 4ms 1 Nov 2023 909th nicholasdejong 550 106 11ms 3 Jun 2020 910th albanian-laundromat 550 206 2ms 25 Jun 2025 911th tfkls 549 54 208ms 16 Oct 2020 912th croc54 548 187 3ms 27 Nov 2024 913th cmdrsabre 548 250 677ms 31 Jan 2020 914th matsagad 547 104 252ms 12 Dec 2024 915th DialFrost 🇸🇬 547 126 2,732ms 28 Oct 2024 916th dokutan 547 207 2ms 27 Mar 2024 917th dcgjb 545 93 405ms 14 May 2024 918th Hacksore 🇺🇸 545 107 11ms 18 Aug 2021 918th akshatj27 🇦🇶 545 107 12ms 11 Jan 2022 918th SiddharthShyniben 545 107 15ms 1 Jul 2022 918th CatsAreFluffy 545 107 16ms 19 Dec 2022 918th FortuiteMan 🇫🇷 545 107 12ms 31 Aug 2025 923rd m-tkach 🇺🇦 544 208 2ms 26 Oct 2022 924th edsrzf 🇳🇿 542 179 250ms 10 Feb 2026 925th Shanethegamer 🇺🇸 541 70 177ms 2 Jun 2022 926th cros107 🇦🇺 541 105 61ms 11 Aug 2023 927th EricBalingit 540 108 12ms 25 May 2021 927th arrudagates 540 108 12ms 23 Jun 2021 929th heanyang1 539 55 196ms 29 May 2025 930th RealAMC 🇳🇿 539 190 4ms 7 Nov 2023 931st MeWhenI 🇻🇦 539 263 164ms 12 Dec 2022 932nd tri1212 🇻🇳 536 106 37ms 8 May 2023 933rd ktiy 536 191 5ms 14 Apr 2022 934th Ephellon 535 109 12ms 14 Mar 2023 935th 2bular 534 109 1,716ms 9 Feb 2026 936th msbranicky 533 192 3ms 13 Oct 2023 937th jtaxen 531 107 14ms 31 Mar 2024 938th jackkav 530 110 11ms 6 Oct 2019 938th tristan-f-r 530 110 11ms 4 Jan 2022 940th jkelly467 530 183 69ms 12 Feb 2026 941st davbass 🇮🇹 529 56 222ms 25 Aug 2023 942nd Yewzir 🇧🇪 527 215 2ms 18 Jan 2024 943rd jiaminglimjm 🇲🇾 526 108 13ms 27 Nov 2019 944th marcin7Cd 524 128 26ms 21 Mar 2021 945th neihousaigaai 522 109 2,647ms 7 May 2021 945th NDR0216 🇹🇼 522 109 398ms 13 Feb 2023 945th NickTheEASDude 🇺🇸 522 109 841ms 20 Aug 2024 948th izabera 522 185 2,117ms 6 Aug 2020 949th 386asm 🇺🇸 522 230 85ms 12 Apr 2023 950th Babafaba 521 48 286ms 30 Oct 2025 951st itiievskyi 🇺🇦 520 57 155ms 21 Aug 2020 952nd GalladeGuy 🇺🇸 520 197 5ms 25 May 2020 953rd wackbyte 517 110 1,447ms 6 Aug 2024 954th SmartK8 🇨🇿 517 195 1,333ms 27 Oct 2022 955th n1LS 516 113 12ms 11 Oct 2019 956th nwellnhof 🇩🇪 516 667 19ms 19 Nov 2022 957th lilyyy411 512 111 34ms 9 Sep 2021 958th dokutan 512 219 1ms 3 Apr 2024 959th MeWhenI 🇻🇦 512 221 51ms 26 Aug 2023 960th inventshah 512 672 17ms 28 Jan 2023 First Prev 881–960 of 4,230 Next Last
