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MatPlus.Net Forum General Secondary Schiffmann

### Secondary Schiffmann

 (A) G.Christoffanini 1st Prize Tijdschrift v.d.NSB 1931 (= 10+8 ) Mate in 2 1.Qf7 (>2.Qxe6) 1...Qxd5 2.Se4 (Sb5?) 1...Qxe2 2.Sb5 (Se4?) 1...Rxd5 2.Qxc7 1...Sxd5 2.Qxf4 1...exd5 2.Qe7

 (B) M.McDowell HM British Chess Magazine 1987-88 (= 11+9 ) Mate in 2 1.Qc4 (>2.d5) 1...Rxc6 2.Sd6 1...Sxc6 2.Qxe6 1...Qxf4 2.Sg3 1...Rxf4 2.Sf2 1...Bxf4 2.Re3 1...Sa3 2.Sc3
I have seen both the mainplays of (A) and the captures on f4 in (B) described as "secondary Schiffmann" (in the latter case not by me!).

Could someone give a proper definition of the term with an example or two?

I would not call what happens in both examples as "secondary Schiffmann".
On the other hand, what happens in the following Cacciari problem can be seen as such.
From a Correction point of view 1...Bxe5 can be seen as random arrival, 1...Qxe5 and 1...Sxe5 - as arrival corrections. These corrections can easily be defined as "secondary Schiffmann defences" against the secondary threat 2.Se7.

 E. Cacciari Parallele 50, 1948 (= 12+9 ) #2 1.d6! (2.Be6#)   1...Bxe5 2.Se7#   1...Qxe5! 2.Sg3#   1...Sxe5! 2.Qxh7#