Amazing how no one is answering your question. “The Secrets of the Russian Chess Masters: Fundamentals of the Game” https://www.amazon.com/Secrets-Russian-Ches

Amazing how no one is answering your question. “The Secrets of the Russian Chess Masters: Fundamentals of the Game” https://www.amazon.com/Secrets-Russian-Chess-Masters-Fundamentals/dp/0393324524 https://www.amazon.com/Secrets-Russian-Chess-Masters-Fundame... Don’t let the title deter you; hitting a wall is almost always about fundamentals, which at 1000 points is a heady topic. Great series. Graduate to Jeremy Silman’s books.