Sibling Rivalry?

What do you do if you are an IM and you have to play a GM? One who is a sibling, and knows all about you?

 
For some ideas, please play over the game below.

 
IM Sofia Polgar-GM Judit Polgar (2696)
Match des Championnes Rapid
France, May 14 2013
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 Nc6 7.Nxc6

[By far, the most common move. Black, however, has the interesting. 7…Qc7!? which warrants further study.

Henryk Gaida (2195)-Kamal Hussain
corres.
ICCF WT/M/GT307, 1992
7…Qc7 8.Bxf7+!? Kxf7 9.Nd4 e6 10.O-O b5 11.a3 Bb7 12.f3 d5 13.exd5 Nxd5 14.Ne4 Be7 15.Kh1 h6 16.Re1 e5 17.Nf5 Rhe8 18.Nxe7 Rxe7 19.Ng3 Nf6 20.Nf5 Rd7 21.Qe2 e4 22.fxe4 Bxe4 23.Ne3 Rad8 24.a4 Qb7 25.axb5 axb5 26.Kg1 Kg8 27.Ng4 Bxg2 28.Bxh6 Nxg4 1/2-1/2.]

 
7…bxc6 8.e5 d5

 

[Now if you are an GM, then you won’t fall for any of the following;

Reinhold Soelter (2164)-E. Heuer
OWL Ch.
Borgholzhausen, Germany, 1968
8…Ng8 9.Qf3 d5 10.Nxd5 Bb7 11.Nc7+ Qxc7 12.Qxf7+ 1-0

Moutousis (2422)-Skoularikis (2224)
Athens, 1988
8…Nd7 9.e6 fxe6 10.Bxe6 Nc5 11.Bxc8 Rxc8 12.O-O g6 13.Be3 Nd7 14.Ne4 Qa5 15.Re1 Kd8 16.Bd2 Qd5 17.c4 Qxc4 18.Ba5+ Ke8 19.Nxd6mate 1-0]

 

8…d5 9.exf6 dxc4 10.Qxd8+ Kxd8 11.fxe7+ Bxe7

 

[And you would also be aware of this game and ideally would have found an improvement over Black’s strategy.

Lewis-Bekerman
South Africa, 1956
11.fxe7+ Bxe7 12.Bf4 Bf5 13.O-O+ Kc8? 14.Na4 Kb7 15.Rhe1 Be6?
2019_12_26_A
16.Rxe6! fxe6 17.Rd7+ Kc8 18.Nb6mate 1-0. But your IM sibling changes the move. So now you are on your own.]

 

12.Be3 Be6 13.O-O-O+ (This move is still a good one as it safeguards the white king, develops a piece, and coordinates White’s active pieces.) 13…Kc8 14.Na4 Rb8 15.Bc5 Bg5+ 16.Kb1 Rb5 17.Bd4 Be7 18.Rhe1 Rd8 19.g3 g5? 20.Nb6+ Kb7 21.Nxc4 +- Rbd5 22.c3 c5 23.Ne3 cxd4 24.Nxd5 Rxd5 25.Rxd4 Rf5 26.Rxe6 fxe6 27.Rd7+ Kc6 28.Rxe7 Kd5 29.Rd7+ Ke4 30.Rd2 Kf3 31.b4 e5 32.c4 e4 33.c5 Rf6 34.Rc2 Rf8 35.c6 h5 (Black’s moves are merely fluff. White is easily winning on the queenside.) 36.c7 Rc8 37.a4 h4 38.gxh4 gxh4 39.b5 h3 40.b6 Kg2 41.b7
2019_12_26_B
41…Rxc7 42.Rxc7 Kxh2 43.b8=Q (Winning in the same number of moves is 43.Rg7 e3 44.b8=Q+ Kh1 45.Qg3.) 43…Kg2 44.Rg7+ Kh1 45.Qg3 h2 46.Qg2mate 1-0