Looking for resources on these four specific variations

Resource

Hello, I am looking for any good resources (preferably Chessable courses) that cover one of the four following variations as I am looking to complete my d4 repertoire now.

QID - Petrosian Variation (a3)

Bogo-Indian - Grünfeld Variation (Nbd2)

QGA - Center Variation (e4)

Blumenfeld Countergambit Accepted

Thanks in advance!

Posted Aug 7, 2025, 4:38 PM UTC

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