The exact chronological position of Chaba's reign cannot be determined precisely, since the Ramesside king lists partly contradict each other concerning the number and position of certain king names. An evaluation of possible reigning events is also difficult.
Chronology and duration of rule
Nabil Swelim considers Chaba's reign at the beginning of the 3rd Dynasty. Background of this theory is the striking similarity between Chaba's Horus name and that of king Chasechemui, the last ruler of the 2nd dynasty. Both names begin with the hieroglyph N28 (sunrise symbol, reading Cha). Swelim sees himself reminded of the Horus names of kings Netjerichet and Sechemchet, both ending with the same symbol (hieroglyph F32, reading Chet). Sechemchet was according to the majority of Egyptologists the direct successor to the throne of Netjerichet. According to Swelim such coincidences in ruler names are a strong indication for a direct succession to the throne.
Michael Rice, on the other hand, regards Chaba as a ruler in his own right and sees him as the direct predecessor of King Huni.
Both theses are not uncontradicted. Grimal, Helck, Wilkinson and Stadelmann point to a typical design of vessels for the 3rd Dynasty in which only the Horus names of kings are inscribed on stone vessels. This type of design is - beside Chaba - also attested for the kings Netjerichet and Snofru. Under Snofru this fashion was partly still further practiced. Since stone vessels of Chaba only show his Horus name, this is regarded as a safe evidence for a dating of Chaba's reign into the 3rd Dynasty. In addition, there are the theories of equation of Chaba with Huni put forward by Stadelmann and Grimal. Therefore, the majority of Egyptologists considers the reign of Chaba to be at the end of the 3rd Dynasty.
A more exact determination of Chaba's reign is also problematic due to this circumstance. If Chaba should be identical with Hudjefa II from the Turin royal papyrus, his reign lasted six years; if, on the other hand, the equation with king Huni is correct, then he ruled for 24 years.
Events
The current archaeological find situation allows only few conclusions about possible events during the reign of Chaba. The evaluations are complicated by the fact that contemporary stone vessels of the 3rd Dynasty are uninscribed except for the mention of the name of Horus. This is documented for example for Horus names like Netjerichet, Chaba and Nebma'at. The only exception is a stone bowl from Abusir with the throne name of king Huni. Especially during the 3rd Dynasty the royal vessel decoration included only the Horus name of the reigning king, images of deity figures, building representations and names as well as mentions of cult festivals are completely missing. Stone vessels of the predecessor dynasties, on the other hand, are extensively inscribed and mention cultically as well as economically important events that took place under the named ruler.
The numerous clay seal impressions, especially from Elephantine, also hardly allow any conclusions, although they show more inscriptions than the mere representation of the king's name. The seal inscriptions mention the titles of high officials typical for this period as well as the places of origin of the vessel contents to which the clay seals once belonged. According to the inscriptions, most of the vessels came from Thinis. One particular official title that survives from the reign of Chaba is that of "Gaufürsten/Bürgermeister und Schatzmeister von Elephantine". The name of the official is not preserved. Other seals have remnants of figural representations of the goddess Bastet. From the ruins of a local temple of Horus at Hierakonpolis come clay seals with the remains of the representation of the god Asch. Ultimately, however, even the clay seal impressions hardly allow any conclusions to be drawn about the course of Chaba's reign, since until the late middle of the Old Kingdom it was customary for clay seal inscriptions to be limited to the stringing together of king's names, official titles, and figures of the gods in alternation.