undouble การใช้

• This forces Black to retreat the bishop to e7 or capture on c3, which transposes to a line of the S鋗isch Variation long considered good for White because he will undouble his pawns at some point by playing cxd5, eliminating the weak pawn on c4, then prepare the e4 pawn break, backed by the bishop pair, which will gain force in the more open type of position which will ensue . 4 . . . Nc6 is the "'Taimanov Variation "', named after Russian GM Mark Taimanov . Black prepares to play . . . e5, which may be preceded by . . . d5 and . . . dxc4, or . . . d6.