Det ble seier i 4.runde mot Norbert Ahrends.Solberg-Ahrends:1.e4 c6 2.d4 d5 3.e5 Lf5 4.Sf3 e6 5.Le2 c5 6.0-0 Sc6 7.c3 cxd4 8.cxd4 Lb4 9.Sc3 a6 10.Lg5 Sge7 11.a3 h6 12.Le3 La5 13.b4 Lb6 14.Sa4 La7 15.Tc1 0-0 16.Sc5 Lxc5 17.Txc5 b6 18.Tc3 b5 19.Dc1 Tc8 20.Sh4 Sb8 21.g4 Txc3 22.Dxc3 Le4 23.f3 Lh7 24.Dd2 g5 25.Sg2 Sd7 26.f4 f6 27.fxg5 fxg5 28.h4 Txf1+ 29.Lxf1 Sg6 30.hxg5 hxg5 31.Lxg5 Db6 32.Le3 Dc7 33.Sf4 Sdf8 34.Sh5 Sd7 35.Lh6 Dd8 36.Lg5 Db6 37.Df2 Sgf8 38.De3 Dc7 39.Le7 Dc2 40.Dh6 Dg6 41.Df4 De4= 42.Dxf8+ Sxf8 43.Sf6+ Kf7 44.Sxe4 Lxe4 45.Lxf8! Kxf8 46.Kf2 Kf7 47.Kg3 Kg6 48.Kh4 Lc2 49.Lh3 1-0.

[Event “1.Sandhausen Schachsommer”]
[Site “Sandhausen”]
[Date “3.8.2021”]
[Round “5”]
[White “John Heinrich”]
[Black “FM Joachim Solberg”]
[Result “0-1”]
1. e4 c5  2. Nf3 e6  3. d4 cxd4 4. Nxd4 Bc5 5. Nc3 Qb6 6. Na4 Qa5+ 7. c3 Bxd4 8.Qxd4
Nf6 9. Nc5 Nc6 10.Qe3 O-O 11. Nb3 Qc7 12. Bd3 d5 13. O-O dxe4 14. Bxe4 Nxe4
15. Qxe4 b6 16. Qc4 e5 17. Be3 Be6 18. Qe2 f5 19. f4 e4 20. Nd2 Rad8 21. Rfd1 Rd3
22. Nb1 Rfd8 23.Na3 Bxa2 24. Nb5 Qd7 25. Nd4 Bc4 26. Rxd3 exd3 27. Qd2 Nxd4
28. Bxd4 Re8 29.Be5 Re7 30. Ra3 Qd5 31. Ra4 b5 32. Ra6 g5 33. g3 Qf3 0-1.