How important is opening( Opening can increase up to 150 elo) - Chess Forums

Some tests in chess engine testing showed that good opening book can increase rating +100 to 150 ( depends on depth of opening book). Today I saw testing "Bong cloud"(the worst opening) among top engines. After about 12 games, data show that Bong cloud decrease the engine rating up to 400 elo .( Top

What are the best chess openings to play to go from 1000 Elo rating to 1500 Elo quickly? - Quora

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Are 150 points elo swings normal? - Chess Forums

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How much do chess openings, when paired with other openings, determine the result of the match? For example, if you are playing with black, is there an opening you should avoid if

What chess openings/defenses should I learn as a 1400 elo player to increase my skill? - Quora

My bullet rating increased by 150 points!! WOWOWOWOW !! - Chess Forums