A member of a Mingrelian (Western Georgia) princely family, son of prince David Dadiani and his wife princess Ekaterine Chavchavadze, Andria Dadiani was born in Zugdidi, W. Georgia.

[citation needed] Prince Andrei Dadiani was a chess player, sponsor and organizer.

He helped sponsor or organize the Belle Epoch chess tournaments at Monte Carlo in 1901, 1902 and 1903 and Barmen in 1905.

[citation needed] Many of his games were published by Numa Preti in "La Strategie" and by William Steinitz in his International Chess Magazine.

Dadiani did indemnify Chigorin for the inconvenience to the sum of 1500 francs, which was slightly more than the value of third prize.