The 50%'ers

Over the last year or so my son and myself have played in a number of tournament together. Interestingly our combined score in these events is usually 50%. In a couple of blitz events I've either scored 5 or 6 out of 9, while he has scored 4 or 3 from 9. In long time control events the night often ends with one of us winning and the other losing, or both of us splitting the point.
While this is statistically interesting, my real worry is that he is getting a lot better. This means that if the trend continues, his scores will go up, while my scores will come down. At least for the moment I have a slight edge, but if the following game is any evidence I'll be soon heading into negative territory.

Yin,Wenlin - Press,Shaun [C56]
Belconnen August, 26.08.2010

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Nf6 5.e5 Ne4 6.Qe2 Nc5 7.c3 dxc3 8.Nxc3 Be7 9.Be3 Ne6 10.0-0-0 0-0 11.h4 d6 12.Ne4 Na5 13.Bd3 d5 14.Neg5 g6 15.Nxe6 Bxe6 16.Bh6 Re8 17.h5 Bg4 18.hxg6 fxg6 19.Qc2 Bxf3 Sacs on g6 are just winning at this point. 20.gxf3 Bg5+ 21.f4 Bxh6 22.Rxh6 Re6 And even here is is still way on top. 23.Rdh1 Rc6 (D)
After the game he confessed he missed this move, but it turns out that my queen has no safe squares to run to after his reply! 24.Rxh7 Rxc2+ 25.Bxc2 Qf8 26.Rh8+ Kf7 27.Rxf8+ Rxf8 28.Rh6 Ke7 ½-½