🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 110 (from laksa045)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa110.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://sudoku.com/sudoku-rules/\')), getAhrefsUnparsedNoserviceFromURL(\'https://sudoku.com/sudoku-rules/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/sudoku.com\/sudoku-rules\/","crawl_time":1775595111,"first_indexed_time":1647022439,"http_code":200,"src_unparsed":"com,sudoku!\/sudoku-rules\/ s443","src_root_hash":"2967727419741620910","history_drop_reason":null,"meta_title":"Sudoku Rules - Strategies, solving techniques and tricks","meta_descriptions":["Sudoku tutorial: watch the videos and explore the basic rules, tips and tricks of Sudoku. Go deeper into advanced Sudoku strategies and techniques to solve Sudoku easier and faster!"],"attrs_boilerpipe_text":"What is Sudoku and what are the rules of this game?\nSudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels.\nWhat are the basic rules of Sudoku?\nSudoku grid consists of 9x9 spaces.\nYou can use only numbers from 1 to 9.\nEach 3×3 block can only contain numbers from 1 to 9.\nEach vertical column can only contain numbers from 1 to 9.\nEach horizontal row can only contain numbers from 1 to 9.\nEach number in the 3×3 block, vertical column or horizontal row can be used only once.\nThe game is over when the whole Sudoku grid is correctly filled with numbers.\nThere are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques.\nOur Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game!","attrs_markdown":"[Classic](https:\/\/sudoku.com\/)[Killer](https:\/\/sudoku.com\/killer)[00h 00mpostcards](https:\/\/sudoku.com\/postcards)[00h 00mSoon Tournament](https:\/\/sudoku.com\/tournaments) [Sep 13Daily Challenges](https:\/\/sudoku.com\/challenges)[Awards](https:\/\/sudoku.com\/awards)[Rules](https:\/\/sudoku.com\/sudoku-rules\/) [Printable Sudoku](https:\/\/sudoku.com\/sudoku-printable)  [Solver](https:\/\/sudoku.com\/sudoku-solver)  [Tips](https:\/\/sudoku.com\/how-to-play\/) [Settings](https:\/\/sudoku.com\/sudoku-rules\/)\n\nEnglish\n\n- [English](https:\/\/sudoku.com\/sudoku-rules\/ \"English\")\n- [日本語](https:\/\/sudoku.com\/jp\/nanpurenoruru\/ \"日本語\")\n- [Italiano](https:\/\/sudoku.com\/it\/regole-del-sudoku\/ \"Italiano\")\n- [中文](https:\/\/sudoku.com\/zh\/shu-du-gui-ze\/ \"中文\")\n- [Deutsch](https:\/\/sudoku.com\/de\/sudoku-regeln\/ \"Deutsch\")\n- [Français](https:\/\/sudoku.com\/fr\/regles-du-sudoku\/ \"Français\")\n- [Español](https:\/\/sudoku.com\/es\/reglas-del-sudoku\/ \"Español\")\n- [Português](https:\/\/sudoku.com\/pt\/regras-do-sudoku\/ \"Português\")\n- [Türk](https:\/\/sudoku.com\/tr\/sudoku-kurallari\/ \"Türk\")\n- [Polski](https:\/\/sudoku.com\/pl\/zasady-sudoku\/ \"Polski\")\n- [한국어](https:\/\/sudoku.com\/ko\/seudoku-gyuchig\/ \"한국어\")\n- [ไทย](https:\/\/sudoku.com\/th\/k-tkas-dok\/ \"ไทย\")\n- [Tiếng Việt](https:\/\/sudoku.com\/vi\/luat-choi-sudoku\/ \"Tiếng Việt\")\n- [عربى](https:\/\/sudoku.com\/ar\/qwad-swdwkw\/ \"عربى\")\n- [Español (México)](https:\/\/sudoku.com\/mx\/reglas-del-sudoku\/ \"Español (México)\")\n- [Português (Brasil)](https:\/\/sudoku.com\/br\/regras-do-sudoku\/ \"Português (Brasil)\")\n- [中文（T）](https:\/\/sudoku.com\/tw\/shu-du-gui-ze\/ \"中文（T）\")\n- [Русский](https:\/\/sudoku.com\/ru\/pravila-sudoku\/ \"Русский\")\n\n[Classic](https:\/\/sudoku.com\/)[Killer](https:\/\/sudoku.com\/killer)\n\n[00h 00mpostcards](https:\/\/sudoku.com\/postcards)[00h 00mSoon Tournament](https:\/\/sudoku.com\/tournaments) [Sep 13Daily Challenges](https:\/\/sudoku.com\/challenges)[Awards](https:\/\/sudoku.com\/awards)[Rules](https:\/\/sudoku.com\/sudoku-rules\/)[Settings](https:\/\/sudoku.com\/sudoku-rules\/)\n\nNew Game\n\nSelect Game Mode\n\nCurrent game progress will be lost\n\nClassic\n\nKiller\n\npostcards\n\n[Easy](https:\/\/sudoku.com\/easy\/)[Medium](https:\/\/sudoku.com\/medium\/)[Hard](https:\/\/sudoku.com\/hard\/)[Expert](https:\/\/sudoku.com\/expert\/)[Master](https:\/\/sudoku.com\/evil\/)[Extreme](https:\/\/sudoku.com\/extreme\/)\n\nRestart\n\n[Easy](https:\/\/sudoku.com\/killer\/easy\/)[Medium](https:\/\/sudoku.com\/killer\/medium\/)[Hard](https:\/\/sudoku.com\/killer\/hard\/)[Expert](https:\/\/sudoku.com\/killer\/expert\/)\n\nRestart\n\nContinue\n\nRestart\n\n[Easy](https:\/\/sudoku.com\/postcards\/event-sudoku)[Medium](https:\/\/sudoku.com\/postcards\/event-sudoku)[Hard](https:\/\/sudoku.com\/postcards\/event-sudoku)[Expert](https:\/\/sudoku.com\/postcards\/event-sudoku)[Master](https:\/\/sudoku.com\/postcards\/event-sudoku)[Extreme](https:\/\/sudoku.com\/postcards\/event-sudoku)\n\nRestart\n\nSudoku rules\n\n[![Last free cell]()Last free cell\"Last free cell\" is the basic Sudoku solving technique. It's pretty simple and based on the fact that each 3×3 block, vertical column or horizontal row on Sudoku grid should contain numbers from 1 to 9 and each number can be used only once within 3×3 block, vertical column or horizontal row. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/last-free-cell\/)\n\n[![Last remaining cell]()Last remaining cell\"Last remaining cell\" is another basic Sudoku strategy. It's based on the fact that numbers should not be repeated within 3×3 block, vertical column and horizontal row. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/last-remaining-cell\/)\n\n[![Last possible number]()Last possible numberLast possible number is a simple strategy that is suitable for beginners. It is based on finding the missing number. To find the missing number you should take a look at the numbers that are already exist in the 3x3 block you are interested in, and in the rows and columns connected with it. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/last-possible-number\/)\n\n[![Notes in Sudoku]()Notes in SudokuIf you get stuck on Sudoku grid and don't see the obvious solutions for the rest of cells, you should use Notes. With the help of Notes you should fill in all the possible options for each blank cell, focusing on the numbers that are already on the Sudoku grid. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/notes-in-sudoku\/)\n\n[![Obvious singles]()Obvious singlesThis strategy is based on the correct placement of Notes. Sometimes it is called Naked Singles. The point is that in a specific cell only one digit (from the Notes) remains possible. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/obvious-singles\/)\n\n[![Obvious pairs]()Obvious pairsLike the \"Obvious Singles\" technique, \"Obvious pairs\" is based on the correct placement of Notes. The point is that you should find 2 cells with the same pairs of Notes within 3x3 block. This means that these pairs of Notes cannot be used in other cells within this 3x3 block. So they can be removed from your Notes. It will be easier to understand this strategy if you look at the example. Continue Reading →](https:\/\/sudoku.com\/sudoku-rules\/obvious-pairs\/)\n\n1[2](https:\/\/sudoku.com\/sudoku-rules\/page\/2\/)[3](https:\/\/sudoku.com\/sudoku-rules\/page\/3\/)\n\n# What is Sudoku and what are the rules of this game?\nSudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels.\n\n## What are the basic rules of Sudoku?\n- Sudoku grid consists of 9x9 spaces.\n- You can use only numbers from 1 to 9.\n- Each 3×3 block can only contain numbers from 1 to 9.\n- Each vertical column can only contain numbers from 1 to 9.\n- Each horizontal row can only contain numbers from 1 to 9.\n- Each number in the 3×3 block, vertical column or horizontal row can be used only once.\n- The game is over when the whole Sudoku grid is correctly filled with numbers.\n\nThere are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques.\n\nOur Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game\\!\n\n![sudoku app icon](https:\/\/sudoku.com\/img\/icon-app.png)\n\nSudoku.com - Number Games\n\nEasybrain\n\n[©2018-2026 Easybrain. All Rights Reserved.](https:\/\/www.easybrain.com\/)\n\n[Home](https:\/\/sudoku.com\/)\n\n[Classic](https:\/\/sudoku.com\/)\n\n[Killer](https:\/\/sudoku.com\/killer)\n\n[Daily Challenges](https:\/\/sudoku.com\/challenges)\n\n[Tournament](https:\/\/sudoku.com\/tournaments)\n\n[Awards](https:\/\/sudoku.com\/awards)\n\n[Rules](https:\/\/sudoku.com\/sudoku-rules\/)\n\n[Tips](https:\/\/sudoku.com\/how-to-play\/)\n\n[Get in Touch](https:\/\/sudoku.com\/get-in-touch \"Get in Touch\")\n\n[Printable Sudoku](https:\/\/sudoku.com\/sudoku-printable)\n\n[Solver](https:\/\/sudoku.com\/sudoku-solver)\n\nEnglish\n\n- [English](https:\/\/sudoku.com\/sudoku-rules\/ \"English\")\n- [日本語](https:\/\/sudoku.com\/jp\/nanpurenoruru\/ \"日本語\")\n- [Italiano](https:\/\/sudoku.com\/it\/regole-del-sudoku\/ \"Italiano\")\n- [中文](https:\/\/sudoku.com\/zh\/shu-du-gui-ze\/ \"中文\")\n- [Deutsch](https:\/\/sudoku.com\/de\/sudoku-regeln\/ \"Deutsch\")\n- [Français](https:\/\/sudoku.com\/fr\/regles-du-sudoku\/ \"Français\")\n- [Español](https:\/\/sudoku.com\/es\/reglas-del-sudoku\/ \"Español\")\n- [Português](https:\/\/sudoku.com\/pt\/regras-do-sudoku\/ \"Português\")\n- [Türk](https:\/\/sudoku.com\/tr\/sudoku-kurallari\/ \"Türk\")\n- [Polski](https:\/\/sudoku.com\/pl\/zasady-sudoku\/ \"Polski\")\n- [한국어](https:\/\/sudoku.com\/ko\/seudoku-gyuchig\/ \"한국어\")\n- [ไทย](https:\/\/sudoku.com\/th\/k-tkas-dok\/ \"ไทย\")\n- [Tiếng Việt](https:\/\/sudoku.com\/vi\/luat-choi-sudoku\/ \"Tiếng Việt\")\n- [عربى](https:\/\/sudoku.com\/ar\/qwad-swdwkw\/ \"عربى\")\n- [Español (México)](https:\/\/sudoku.com\/mx\/reglas-del-sudoku\/ \"Español (México)\")\n- [Português (Brasil)](https:\/\/sudoku.com\/br\/regras-do-sudoku\/ \"Português (Brasil)\")\n- [中文（T）](https:\/\/sudoku.com\/tw\/shu-du-gui-ze\/ \"中文（T）\")\n- [Русский](https:\/\/sudoku.com\/ru\/pravila-sudoku\/ \"Русский\")\n\n[Terms](https:\/\/easybrain.com\/terms \"Terms\")[Cookie Policy](https:\/\/sudoku.com\/page\/cookies\/ \"Cookie Policy\")[Privacy](https:\/\/easybrain.com\/privacy \"Privacy\")\n\nWe and our partners store and\/or access information (including personal data such as device identifiers in cookies) on your device to provide, measure, analyze, improve our services and personalize ads and content. To manage your cookie preferences, click here. For more information or to change your preferences at any time go to the [Cookie Policy](https:\/\/sudoku.com\/page\/cookies\/ \"Cookie Policy\").\n\nCookie preferences\n\n- About Cookies\n- Strictly Necessary Cookies\n- Analytics Cookies\n- Advertising and Measurement Cookies\n- More Information\n\nAbout Cookies\n\nCookies are small pieces of text sent to your web browser that assist us in providing our Services according to the purposes described. A cookie file is stored in your web browser and allows our Services or a third-party to recognize you and make your next visit easier and the Service more useful to you. Some of the purposes for which Cookies are installed may also require the User's consent.\n\nCookies can be \"persistent\" or \"session\" cookies. Persistent cookies remain on your personal computer or mobile device when you go offline, while session cookies are deleted as soon as you close your web browser.\n\nStrictly Necessary Cookies\n\nStrictly necessary cookies are set to recognise you when you return to our Website, set up your consent settings, and embed functionality from third party services. Also, these cookies enable us to personalise our content for you and remember your last game progress. These cookies are necessary for the functionality of the Website. You may set your browser to block these cookies, but the Website will not function properly without them.\n\nCookies Used\n\n- Session Cookies\n- Consent Cookies\n- YouTube Cookies\n- Google reCaptcha\n- Cloudflare Load Balancer\n\nAnalytics Cookies\n\nWe may use analytics cookies to track information on how the Website is used so that we can make improvements. We may also use analytics cookies to test new advertisements, pages, features or new functionality of the Website to see how our users react to them.\n\nCookies Used\n\n- Google Analytics\n- <https:\/\/policies.google.com\/privacy?hl=en>\n\nAdvertising and Measurement Cookies\n\nThese types of cookies and other storage technologies such as Pixel Tags are used to deliver advertisements on and through the Service and track the performance of these advertisements. To this end, we may share information about your use of our site with our trusted social media and advertising partners. These cookies may also be used to enable third-parties, including social media and advertising networks to provide measurement services and deliver ads that may be relevant to you based upon your activities or interests.\n\nCookies Used\n\n- AdSense by Google and their partners\n- <http:\/\/www.google.com\/policies\/privacy\/>\n- <https:\/\/support.google.com\/adsense\/answer\/9012903?hl=en-GB&ref_topic=7670012>\n- Ad Manager by Google Ireland Limited\n- <https:\/\/policies.google.com\/privacy>\n- Meta Pixel by Meta Ireland Platform Limited an Meta Platforms Inc.\n- <https:\/\/www.facebook.com\/policies\/cookies>\n- Index Exchange by Index Exchange Inc.\n- [https:\/\/www.indexexchange.com\/privacy](https:\/\/www.indexexchange.com\/privacy\/)\n- OpenX by OpenX Software Ltd (US)\n- <https:\/\/www.openx.com\/legal\/privacy-policy\/>\n- PubMatic by PubMatic, Inc. (US)\n- <https:\/\/pubmatic.com\/legal\/privacy-policy\/>\n- Rise Engage byTypeA Holdings Ltd.\n- <https:\/\/risecodes.com\/video-advertisement-player-privacy-policy\/>\n- Rubicon Project by Magnite Inc. (US)\n- <https:\/\/www.magnite.com\/legal\/advertising-technology-privacy-policy\/>\n- Yieldmo by Yieldmo, Inc.\n- <https:\/\/www.yieldmo.com\/privacy-policy\/>\n- Amazon by Amazon.com, Inc.\n- <https:\/\/aws.amazon.com\/privacy\/>\n- TripleLift by Triple Lift, Inc.\n- <https:\/\/triplelift.com\/privacy\/>\n- Smaato by Smaato, Inc. (US)\n- <https:\/\/www.smaato.com\/privacy\/>\n- LoopMe LoopMe Limited (UK).\n- <https:\/\/legal.loopme.com\/privacy-center#contract-hyartvn1o>\n- Xandr by Xandr,Inc. (USA)\n- <https:\/\/about.ads.microsoft.com\/en-us\/solutions\/xandr\/platform-privacy-policy>\n- TAPPX by TAPPCELERATOR MEDIA, S.L (Spain)\n- <https:\/\/www.tappx.com\/legal\/privacy-policy>\n- Minute Media by Pro Sportority Ltd (Israel)\n- <https:\/\/www.minutemedia.com\/policies\/privacy-policy>\n- Sharethrough by Sharethrough Inc (Canada)\n- <https:\/\/www.sharethrough.com\/privacy-center\/consumer-privacy-notice>\n- Vidazoo by Vidazoo Ltd. (Israel)\n- <https:\/\/vidazoo.gitbook.io\/vidazoo-legal\/privacy-policy>\n- Media.net by Media.net Advertising FZ-LLC (UAE)\n- <https:\/\/www.media.net\/privacy-policy\/>\n- InMobi by InMobi PTE Ltd (Singapore)\n- <https:\/\/www.inmobi.com\/privacy-policy\/>\n- Ogury by Ogury Ltd (UK)\n- <https:\/\/ogury.com\/ogury-website-and-customer-privacy-and-cookie-notice\/>\n- Nexxen by Nexxen Group LLC (US)\n- <https:\/\/nexxen.com\/privacy-policy\/>\n- Blis by Blis Corp Limited (UK)\n- <https:\/\/blis.com\/blis-privacy-policy-for-online-advertising-and-related-uses\/>\n- Start.io by Start.io Inc (US)\n- <https:\/\/www.start.io\/policy\/privacy-policy\/>\n- OMS by Online Media Solutions Ltd (Israel)\n- <https:\/\/onlinemediasolutions.com\/privacy-policy\/>\n- Nativo by Nativo, Inc (US)\n- <https:\/\/www.nativo.com\/legal\/interest-based-ads>\n- AnyClip by AnyClip Inc (US)\n- <https:\/\/anyclip.com\/privacy-policy\/>\n- Open Web Technologies by Open Web Technologies Ltd (Israel)\n- <https:\/\/www.openweb.com\/legal-and-privacy\/privacy\/>\n- Venatus by Venatus Media Limited (England)\n- <https:\/\/www.venatus.com\/privacy-policy>\n\nMore Information\n\nPlease visit our [Cookie Policy](https:\/\/sudoku.com\/page\/cookies\/ \"Cookie Policy\") to learn more about the cookies we use on our Website.\n\nSave\n\nAccept all and Continue","attrs_readable_markdown":"## What is Sudoku and what are the rules of this game?\nSudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels.\n\n## What are the basic rules of Sudoku?\n- Sudoku grid consists of 9x9 spaces.\n- You can use only numbers from 1 to 9.\n- Each 3×3 block can only contain numbers from 1 to 9.\n- Each vertical column can only contain numbers from 1 to 9.\n- Each horizontal row can only contain numbers from 1 to 9.\n- Each number in the 3×3 block, vertical column or horizontal row can be used only once.\n- The game is over when the whole Sudoku grid is correctly filled with numbers.\n\nThere are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques.\n\nOur Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game\\!","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

2 hours ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://sudoku.com/sudoku-rules/
Last Crawled	2026-04-07 20:51:51 (2 hours ago)
First Indexed	2022-03-11 18:13:59 (4 years ago)
HTTP Status Code	200
Meta Title	Sudoku Rules - Strategies, solving techniques and tricks
Meta Description	Sudoku tutorial: watch the videos and explore the basic rules, tips and tricks of Sudoku. Go deeper into advanced Sudoku strategies and techniques to solve Sudoku easier and faster!
Meta Canonical	null
Boilerpipe Text	What is Sudoku and what are the rules of this game? Sudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels. What are the basic rules of Sudoku? Sudoku grid consists of 9x9 spaces. You can use only numbers from 1 to 9. Each 3×3 block can only contain numbers from 1 to 9. Each vertical column can only contain numbers from 1 to 9. Each horizontal row can only contain numbers from 1 to 9. Each number in the 3×3 block, vertical column or horizontal row can be used only once. The game is over when the whole Sudoku grid is correctly filled with numbers. There are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques. Our Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game!
Markdown	[Classic](https://sudoku.com/)[Killer](https://sudoku.com/killer)[00h 00mpostcards](https://sudoku.com/postcards)[00h 00mSoon Tournament](https://sudoku.com/tournaments) [Sep 13Daily Challenges](https://sudoku.com/challenges)[Awards](https://sudoku.com/awards)[Rules](https://sudoku.com/sudoku-rules/) [Printable Sudoku](https://sudoku.com/sudoku-printable) [Solver](https://sudoku.com/sudoku-solver) [Tips](https://sudoku.com/how-to-play/) [Settings](https://sudoku.com/sudoku-rules/) English - [English](https://sudoku.com/sudoku-rules/ "English") - [日本語](https://sudoku.com/jp/nanpurenoruru/ "日本語") - [Italiano](https://sudoku.com/it/regole-del-sudoku/ "Italiano") - [中文](https://sudoku.com/zh/shu-du-gui-ze/ "中文") - [Deutsch](https://sudoku.com/de/sudoku-regeln/ "Deutsch") - [Français](https://sudoku.com/fr/regles-du-sudoku/ "Français") - [Español](https://sudoku.com/es/reglas-del-sudoku/ "Español") - [Português](https://sudoku.com/pt/regras-do-sudoku/ "Português") - [Türk](https://sudoku.com/tr/sudoku-kurallari/ "Türk") - [Polski](https://sudoku.com/pl/zasady-sudoku/ "Polski") - [한국어](https://sudoku.com/ko/seudoku-gyuchig/ "한국어") - [ไทย](https://sudoku.com/th/k-tkas-dok/ "ไทย") - [Tiếng Việt](https://sudoku.com/vi/luat-choi-sudoku/ "Tiếng Việt") - [عربى](https://sudoku.com/ar/qwad-swdwkw/ "عربى") - [Español (México)](https://sudoku.com/mx/reglas-del-sudoku/ "Español (México)") - [Português (Brasil)](https://sudoku.com/br/regras-do-sudoku/ "Português (Brasil)") - [中文（T）](https://sudoku.com/tw/shu-du-gui-ze/ "中文（T）") - [Русский](https://sudoku.com/ru/pravila-sudoku/ "Русский") [Classic](https://sudoku.com/)[Killer](https://sudoku.com/killer) [00h 00mpostcards](https://sudoku.com/postcards)[00h 00mSoon Tournament](https://sudoku.com/tournaments) [Sep 13Daily Challenges](https://sudoku.com/challenges)[Awards](https://sudoku.com/awards)[Rules](https://sudoku.com/sudoku-rules/)[Settings](https://sudoku.com/sudoku-rules/) New Game Select Game Mode Current game progress will be lost Classic Killer postcards [Easy](https://sudoku.com/easy/)[Medium](https://sudoku.com/medium/)[Hard](https://sudoku.com/hard/)[Expert](https://sudoku.com/expert/)[Master](https://sudoku.com/evil/)[Extreme](https://sudoku.com/extreme/) Restart [Easy](https://sudoku.com/killer/easy/)[Medium](https://sudoku.com/killer/medium/)[Hard](https://sudoku.com/killer/hard/)[Expert](https://sudoku.com/killer/expert/) Restart Continue Restart [Easy](https://sudoku.com/postcards/event-sudoku)[Medium](https://sudoku.com/postcards/event-sudoku)[Hard](https://sudoku.com/postcards/event-sudoku)[Expert](https://sudoku.com/postcards/event-sudoku)[Master](https://sudoku.com/postcards/event-sudoku)[Extreme](https://sudoku.com/postcards/event-sudoku) Restart Sudoku rules [![Last free cell]()Last free cell"Last free cell" is the basic Sudoku solving technique. It's pretty simple and based on the fact that each 3×3 block, vertical column or horizontal row on Sudoku grid should contain numbers from 1 to 9 and each number can be used only once within 3×3 block, vertical column or horizontal row. Continue Reading →](https://sudoku.com/sudoku-rules/last-free-cell/) [![Last remaining cell]()Last remaining cell"Last remaining cell" is another basic Sudoku strategy. It's based on the fact that numbers should not be repeated within 3×3 block, vertical column and horizontal row. Continue Reading →](https://sudoku.com/sudoku-rules/last-remaining-cell/) [![Last possible number]()Last possible numberLast possible number is a simple strategy that is suitable for beginners. It is based on finding the missing number. To find the missing number you should take a look at the numbers that are already exist in the 3x3 block you are interested in, and in the rows and columns connected with it. Continue Reading →](https://sudoku.com/sudoku-rules/last-possible-number/) [![Notes in Sudoku]()Notes in SudokuIf you get stuck on Sudoku grid and don't see the obvious solutions for the rest of cells, you should use Notes. With the help of Notes you should fill in all the possible options for each blank cell, focusing on the numbers that are already on the Sudoku grid. Continue Reading →](https://sudoku.com/sudoku-rules/notes-in-sudoku/) [![Obvious singles]()Obvious singlesThis strategy is based on the correct placement of Notes. Sometimes it is called Naked Singles. The point is that in a specific cell only one digit (from the Notes) remains possible. Continue Reading →](https://sudoku.com/sudoku-rules/obvious-singles/) [![Obvious pairs]()Obvious pairsLike the "Obvious Singles" technique, "Obvious pairs" is based on the correct placement of Notes. The point is that you should find 2 cells with the same pairs of Notes within 3x3 block. This means that these pairs of Notes cannot be used in other cells within this 3x3 block. So they can be removed from your Notes. It will be easier to understand this strategy if you look at the example. Continue Reading →](https://sudoku.com/sudoku-rules/obvious-pairs/) 1[2](https://sudoku.com/sudoku-rules/page/2/)[3](https://sudoku.com/sudoku-rules/page/3/) # What is Sudoku and what are the rules of this game? Sudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels. ## What are the basic rules of Sudoku? - Sudoku grid consists of 9x9 spaces. - You can use only numbers from 1 to 9. - Each 3×3 block can only contain numbers from 1 to 9. - Each vertical column can only contain numbers from 1 to 9. - Each horizontal row can only contain numbers from 1 to 9. - Each number in the 3×3 block, vertical column or horizontal row can be used only once. - The game is over when the whole Sudoku grid is correctly filled with numbers. There are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques. Our Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game\! ![sudoku app icon](https://sudoku.com/img/icon-app.png) Sudoku.com - Number Games Easybrain [©2018-2026 Easybrain. 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Readable Markdown	## What is Sudoku and what are the rules of this game? Sudoku is a popular logic puzzle with numbers. Its rules are quite simple, so even beginners can handle the simple levels. ## What are the basic rules of Sudoku? - Sudoku grid consists of 9x9 spaces. - You can use only numbers from 1 to 9. - Each 3×3 block can only contain numbers from 1 to 9. - Each vertical column can only contain numbers from 1 to 9. - Each horizontal row can only contain numbers from 1 to 9. - Each number in the 3×3 block, vertical column or horizontal row can be used only once. - The game is over when the whole Sudoku grid is correctly filled with numbers. There are already many numbers filled in on the grid in the simple Sudoku puzzles. Therefore it’s not so difficult to cope with the solution if you are familiar with the basic rules. However, in order to solve difficult levels and deal with them quickly, you need to use some tricks and learn advanced Sudoku techniques. Our Sudoku guide has a lot of tutorial videos for players of all skill levels: from Sudoku absolute beginners to experts. Watch the videos to check out all the rules, tips and strategies of Sudoku and enjoy the game\!
Shard	110 (laksa)
Root Hash	2967727419741620910
Unparsed URL	com,sudoku!/sudoku-rules/ s443