Major world events of 1976 included the Mars Landing that sent back the first color photographs of the Martian surface. The supersonic Concorde launched its first scheduled commercial passenger flights and Apple Computer was founded.
In the United States 1976 was defined by the Bicentennial celebrations. Sylvester Stallone burst into superstardom in the smash-hit sports drama Rocky. Hit television shows were Charlie’s Angels, Happy Days, Laverne & Shirley, The Bionic Woman and Welcome Back, Kotter. American figure skater Dorothy Hamill won Olympic gold.
Few people were aware of it, but Americans Robert Byrne, Lubomir Kavale, Larry Evans, James Tarjan, William Lombardy and Kim Commons also won gold. They won it at the 22nd Chess Olympiad in Haifa, Israel. This Olympiad was marred by a massive boycott by teams from the Soviet Union, Eastern Bloc and Arab nations because it was held in Israel.
Chess was dominated by World Champion Anatoly Karpov who had one of the most boring styles ever. A U.S. player won the World Junior Championship in 1976. He was Mark Diesen (1957-2008), whose father Carl Diesen was a well known tournament/correspondence player, earned the iM title for his accomplishment. During his broef career he won the Louisiana State Champion in 1986, 1987 and 1988.
He grew up in Potomac, Maryland (a suburb of Washington, D.C.), where he become a student of GM Lubosh Kavalek, who was one of the strongest players in the world at that time.
Even though Kavalek was noted for his tactical style, Diesen developed a positional style that made him a difficult opponent and he scored victories over GMs like Larry Evans, Borislav Ivkov, John Nunn and Eugenio Torre. Diesen played in only one U.S. Championship (in 1980), but had to withdraw after three rounds after injuring himself in a fall.
He graduated from the University of Tennessee with a degree in chemical engineering and except for some local coaching abandoned chess and began a career as a reservoir engineer for Shell Oil, Pennzoil and Noble Energy. He died in Conroe, Texas of unspecified causes on December 9, 2008; he was 51 years old.
Here is a good example of his precise positional play. The tournament was a 12-round Swiss with 54 players. Diesen finished first with 10 points. He was followed by Lubomir Ftacnik (9.5) and Nir Grinberg (9.0).
[Event "World Junior Champ., Groningen"]
[Site ""]
[Date "1976.??.??"]
[Round "?"]
[White "Mark Diesen"]
[Black "Peter Van Egmond"]
[Result "1-0"]
[ECO "C91"]
[Annotator "Stockfish 19"]
[PlyCount "53"]
[EventDate "1976.12.21"]
{C91: Closed Ruy Lopez} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%mdl 32]} a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. d4 {Diesen expected that Van Edmond would play his favorite Marshall Counterattack and although he knew some good lines against it he chooses to avoid it,} (8. c3 {is the most common here an the Marshall is} d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 {This is the main line and is most likely to leaf to a draw with best play.}) 8... d6 9. c3 Bg4 10. Be3 exd4 11. cxd4 Na5 12. Bc2 c5 13. Nbd2 cxd4 14. Bxd4 Nc6 15. Be3 d5 {This is the main line and the chances are equal.} 16. h3 Bh5 17. g4 (17. Rc1 {is the main alternative.} Nb4 18. Bb1 dxe4 19. Nxe4 Qxd1 20. Rcxd1 Bxf3 21. gxf3 Nbd5 22. Nxf6+ Nxf6 23. f4 {and Pridorozhni,A (2533)-Bykov,E (2419) Moscow 2022 is completely equal and was eventually drawn.}) 17... dxe4 {The simplest way of equalizing.} (17... d4 {is also equal, but a bit more complicated.} 18. Bg5 d3 19. Bb3 Bg6 20. Rc1 Nd4 {with an active position.}) 18. gxh5 exf3 19. Qxf3 Nb4 {While this is not bad 19,,,Nd4 was more precise because it would have gained the two Bs.} 20. Bb3 {The B is now on an active diagonal.} Nbd5 {More active would have been 20...a5 and 21...Nd3} 21. Bg5 {Worth considering was 21.Nf1 and if 21...Nxe3 22.Nxe3 the N has a potential outpost on f5.} h6 22. Bh4 Re8 $2 {[%mdl 8192] This innocent looking move is tactically faulty.} (22... Ra7 23. Rad1 {The point of the last move, Black is now equal.} Rd7) 23. Rad1 {White has completed his development and black is completely tied up.} Ra7 {Too late!} 24. Ne4 {[%mdl 32] Headed for f5} Rd7 25. Ng3 Nc7 26. Nf5 {White's pieces are poised for the kill. and apparently Van Egmond doesn't suscpect a thing. Of course even if he pays another move that 26...Bb4 he is still lost.} Bb4 {White to play and win.} 27. Nxh6+ $1 {[%mdl 512] Black resigned.} (27. Nxh6+ {White gets a won position in all variations.} Kf8 (27... gxh6 28. Bxf6) 28. Rxe8+ Kxe8 (28... Qxe8 29. Rxd7 Qxd7 30. Nxf7) 29. Rxd7 Qxd7 (29... gxh6) (29... Kxd7 30. Nxf7 Qf8 31. h6 gxh6 32. Qf5+ Kc6 33. Bxf6) 30. Nf5 Nfd5 31. Nxg7+ Kf8 32. Nf5 {White is winning.}) 1-0
















