The Gambit of Giulio Cesare Polerio
In the so called „Abtauschvariante“ (7.d3) black is not forced to ‚abtauschen‘ (= exchange Queens for entering an end-game/end-game like position) by 7.d3 Bh6 8.Nc3 Ne7 9.Bxf4 Bxf4 10.Qxf4 Qxf4 11.Rxf4 ((con-)sequence more or less forced by 7.- Bh6, move order may vary). Rather, a very interesting alternative is available which is 7.- Nc6! (Rosenthal/Taubenhaus/Gossip).
In 1998 the following match happened:
We called John’s move 10.- Qd8! the ‚Yoos trap‘, or ‚Yoos Falle‘. The consequence of running into the Yoos trap, is just shown in Oortwijn-Yoos (10.- Qd8 11.Bg5 Qxg5 … and White resigned at once).
But what happens if White circumvents the trap and is playing another 11th move? From my point of view 11.Qh5 is the best continuation, but it seems to be insufficient, see
I just have seen some discussions in the web that the position after 10.- Qd8! (Yoos, 1998) is unclear. May be … but I have seen nothing else than the result of 0:1 after 10. – Qd8!. Here are what I have as matches for 11.c3:
So, is the position reached after 7.d3 Nc6! 8.Bxf4 d6 9.Nc3 Be6 10.Nd5 Qd8! still unclear?
Has someone a match that did not end 0-1 after 10.- Qd8?
And provided that White has nothing better to do else than to resign after 10.-Qd8: Can White improve earlier?