Why is Bukhari's hadith collection better than those collected by earlier scholars of fiqh where the chains are shorter?

Sahih al-Bukhari is a collection of hadith compiled by Muhammad al-Bukhari, a 9th century Islamic scholar. This collection is considered one of the most reliable and authoritative sources of hadith and is widely accepted by Sunni Muslims.

There are several reasons why Sahih al-Bukhari is considered a particularly reliable collection of hadith. One reason is that al-Bukhari applied rigorous standards in selecting and verifying the hadith that he included in his collection. He is known to have traveled extensively to gather hadith from a wide range of sources, and he is said to have only included hadith in his collection that met his high standards of authenticity.

Another reason why Sahih al-Bukhari is considered a particularly reliable collection is that it includes hadith with relatively short chains of transmission (isnad). In Islamic tradition, the chain of transmission (isnad) of a hadith refers to the sequence of individuals through whom the hadith has been transmitted. A hadith with a short chain of transmission is considered more reliable than a hadith with a long chain, as there is less opportunity for errors or changes to be introduced in the transmission process.

Overall, Sahih al-Bukhari is considered a particularly reliable collection of hadith due to the rigorous standards that al-Bukhari applied in selecting and verifying the hadith, as well as the inclusion of hadith with relatively short chains of transmission. These factors contribute to the widespread acceptance of Sahih al-Bukhari as a reliable source of Islamic tradition and teachings.