There are people who always write everything correctly, feel the language perfectly, and know the rules by heart. There are others who spit on the Russian language and are guided by the universal principle: “chickpeas understood what I wanted to say ?!))) " . However, most of all - at least I want to believe it - normal people who try to write well, but have difficulties with certain rules.
So that the latter save their time as much as possible, and not waste it on digging into directories and poorly organized websites, Ilya created a project therules.ru, where all the rules of Russian spelling and punctuation are presented very clearly and clearly.
The site also runs a very powerful search. For example, you can type "nn", well, or there "pre pri", or even "(!)", And immediately read the relevant rules. The trailer shows what super sites can do:
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The rules themselves have been available since 1956, but nobody has done such a great job in indexing and codification with such a successful result.