Tactics: Caution: Manoeuvering in Progress

Caution: Manoeuvering in Progress
Demchenko - Zhou

The first Almonte Open is being played this weekend at the Gatehouse on the beautiful conservation grounds at the Mill of Kintail. The second round saw two CYCC U14 girls champions face off: Svitlana Demchenko (2015 CYCC U12g Champ) had White against WIM Qiyu Zhou (2013 CYCC U14g Champ).

In the diagrammed position, White had just pushed e3-e4, and after the exchanges following ...dxe4 both sides are left with isolated pawns.
What should White play now:

a) Rfd1 (developing the R and supporting d4);
b) Nb1 (attacking c4 and defending a3 in anticipation of ...Rfb8);
c) something else?

Solution: see the game below.

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 Round:  Result:

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