Tuesday’s winning 5-second tactics

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im  Liu, Guanchu  (2409)

 gm  Wei, Yi  (2641)

China zt 3.5 Zhongshan 2014.10.27  Position after 15 moves.  An unusual opening, both sides fighting for the initiative.  Black had just played 15…Qe7, planning to castle long.

HOW DOES WHITE GET A BIG EDGE?

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China zt 3.5 Zhongshan 2014.10.27 Wei, Yi–Liu, Guanchu: 16.Rxf6! Qxf6 17.Bg5 Qg7 18.Qf4! Nd7  (No better is 18…f6 19.Bxf6 Rf8 20.Qxe5+ ) 19.Nb5 1-0  A bit premature, but understandable. If 19…f6? 20.Nxc7+ Ke7 21.Rf1 etc.  After  the correct 19…Rc8 White plays 20.Ng4!  followed by 21.Nf6, suffocating Black.