Hasn't your bet already been beat in concept by https://en.wikipedia.org/wiki/L%C3%A1szl%C3%B3_Polg%C3%A1r ?

He is a chess teacher who decided to train his daughters in chess from a very young age. What do you know, two of them became the first and second best players, with the best being considered the best woman chess player of all time. Unlikely that they somehow just all got chess genius "genes" from him.

It really does seem that heavy investment from a young age by a good teacher can work wonders.