[Event "Romania vs. Hungary"]  [Date "Bucharest 1963"]  [White "Florin Gheorghiu"]  [Black "Lajos Portisch"]  [Result "1-0"]  [ECO "B33"]  [Annotator "ATH"]  [PlyCount "55"]  [EventDate "1963.??.??"]  [SourceTitle "StarBase 2.88"]  [Source "Pickard & Son"]  [SourceDate "2003.01.15"]  [SourceVersion "1"]  [SourceVersionDate "2003.01.15"]  [SourceQuality "2"]   1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6 5. Nb3 (5. c3 $5) 5... Nf6 6. Nc3 e6  7. Be3 Qc7 (7... Qd8 8. a3 d5 9. exd5 exd5 10. Qd2 $16 {Rozo-Hjorth, ICCF  email 2018}) 8. a3 a6 9. f4 d6 10. Bd3 (10. g4 $1 d5 11. Bg2 $14) 10... b5 11.  Qf3 Bb7 (11... Be7 $5) 12. O-O Nd7 $2 (12... Be7 $11) 13. Rad1 (13. Qh3 $1 $16)  13... Be7 14. Qg3 O-O 15. Qh3 Nc5 (15... b4 $1 16. Nd5 $1 exd5 17. exd5 Nf6 18.  dxc6 Bc8 $11) 16. Nxc5 dxc5 17. e5 h6 18. f5 (18. Rf3 $1 Nxe5 19. Rg3 Nxd3 20.  Qxh6 Bg5 21. Qxg5 f6 22. Qg4 Nxb2 23. Qxe6+ Rf7 24. Nd5 $16) 18... Qxe5 19. f6  (19. Bf4 $1 Qf6 20. fxe6 $16) 19... Bxf6 20. Bf4 Qd4+ 21. Kh1 (21. Rf2 Be7 $11)  21... c4 $2 (21... Rad8 22. Be2 b4 $1 23. Rxd4 Nxd4 $11) 22. Be4 Qb6 ({  Stockfish suggests dumping the queen with} 22... Qxd1 23. Nxd1 $18 {as Black's  best course. In other words, time to resign}) 23. Bxh6 Rfd8 24. Be3 (24. Bg5 $1  {is the quick method}) 24... Nd4 $2 ({Not that it matters but} 24... Rxd1 25.  Rxd1 {would prolong the game}) 25. Qh7+ Kf8 26. Bxb7 Qxb7 27. Rxf6 (27. Ne4 {  is even stronger, according to Stockfish}) 27... gxf6 28. Bxd4 1-0