1.e4 e6 2.d4 d5 3.c4 dxe4 4.Be3 Nf6 5.f3 Bb4+ 6.Nc3 O-O 7.Qc2 exf3 8.Nxf3
8.gxf3 is a respectable alternative.
8...Nbd7 9.Bd3 b6 10.O-O Bb7 11.Rad1 h6?!
A common mistake, inviting White to attack.
12.Ne5 Bxc3 13.Qxc3
This is reasonable. 13.bxc3 is often played in similar positions, weakening the pawn structure.
13...Qe7
13...Be4?? 14.Nxd7 Qxd7 15.Rxf6 Bxd3 16.Qxd3 gxf6 17.Bxh6 +-.
14.Nxd7 Nxd7 15.b4 a5 16.b5 Rfe8 17.Qe1 Rad8 18.Qg3 Qd6 19.Bf4 e5
19...Qxd4+?? 20.Kh1 and Black is powerless against all threats Bh7+, Bxh6 and Bxc7.
20.dxe5 Qe6 21.Qh4 c6?
The knight cannot move because of 22.Bf5!.
21...g5?? 22.Bxg5 hxg5 23.Qxg5+ Kf8 (23...Kh8 24.Rf4) 24.Bg6 +-.
22.Be4 Qxc4 23.Bxh6 Qc5+ 24.Kh1 Qxe5
W
24...gxh6 25.Qxh6 wins easily:
25.Bh7+ Kh8
25...Kf8 26.Qg4 wins as follows:
26.Bg5 Nf6 27.Bg6+ Kg8 28.Bxf6 Qxf6 29.Qh7+ Kf8 30.Qh8+ Ke7 31.Rfe1+ 1-0
31...Qe6 32.Qxg7! Rxd1 33.Qxf7+ Kd6 34.Rxd1+ +-.
Rating over 2400, Söderberg holds the IM title in ICCF.