diagonal: Ivanchuk played now ten times at Capablanca Memorial (Havana, Varadero), and is a record eight-time winner (he won seven times outright, and once on tie-break; as of and including 2019).
Selection of <Record number of wins at same major international invitation chess tournaments *series* in classical chess>, at least five wins or co-wins (as of 2019):
<Najdorf: 11 wins (!) at closed Mar del Plata series>, plus later three times at the Mar del Plata Open, in total 14 wins at same venue:
<Kramnik: 10x Dortmund> plus 1 Dortmund Open earlier
<Kasparov: 9x Linares>
<Ivanchuk: 8x Capablanca Memorial>
<Carlsen: 7x Wijk aan Zee>
<Karpov: 7x Tilburg>
<Schlechter: 6x Leopold Trebitsch Memorial (all in Vienna)>
<Anand: 5x Wijk aan Zee>
<Gligoric: 5x Hastings (closed Christmas Congress)>
<Tal: 5x Tallinn International> (Keres Tournament named Keres Memorial after Keres had died)
<Beliavsky: 5x Vidmar Memorial> (various venues, incl. one national tournament under this label)
<4 international invitation tournament wins of the same series>:
Euwe, Portisch, Korchnoi, Aronian (all at Beverwiijk / Wijk aan Zee)
Tartakower, Flohr, Szabo (all at closed Hastings Christmas Congress)
Vachier-Lagrave (Biel GMT), plus one match win at Biel
Carlsen (London Chess Classic)
Carlsen (Gashimov Memorial)
Miles (Capablanca Memorial)
Polugaevsky (Chigorin Memorial)
Ivanchuk (Linares), incl. one win as joint 1st, with Grischuk declared winner on tie-break, higher number of wins
Major International Invitation *series* in classical chess means: no Open Festivals, no National Championships, no Club tourneys, no Rapid, Blitz, and / or Combined series, no Team events, no Junior / Senior contests
@ Kramnik: <25 entries at Dortmund GM> (1993, 1995-2018, except in 2002 when the Einstein Candidates were held), in total 26 participations at Dortmund incl. the Open in 1992 (joint first place).
Kramnik won a record ten times at the Dortmund Grandmaster tournament, five of them as the single winner, five of them shared. The singles were in 1995, 1997, 2007, 2009 and 2011. In 1996 he shared with Anand, in 1998 with Adams and Svidler, in 2000 with Anand, in 2001 with Topalov and in 2006 with Svidler.
@ Kasparov: <14 entries at Linares>, he won or co-won in 1990, 1992, 1993, 1997, 1999-2002, and 2005: record nine-time winner; he did also play in 1991, 1994, 1998, 2003, 2004. Gazza did not play at Linares in 1995 and 1996 (no tournament that year), prior to 1990, and after 2005 (retirement).
@ Karpov: <12 entries at Tilburg>, he won or co-won at the beginning of the series in 1977, 1979, 1980, 1982, 1983 (note: Fischer, his predecessor as World Champion was no longer active; then World Champion Challenger Korchnoi always not invited to secure Karpov's participation; Korchnoi went on to win at his first Tilburg invitation in 1985; Karpov generally also avoided to play Kasparov (not only at Tilburg) in a same tournament before their World Championship marathon started), he won later again in 1988 and 1993 (k.-o.), record seven-time winner; he also played in 1986, 1991, 1992 (k.o.) 1994 (k.o.), 1996.
@ Carlsen: <12 entries at Wijk aan Zee - A>, seven wins so far as of 2019 (overall he played 15x in Wijk A, B, C group, starting in 2004).
Wijk aan Zee, Linares, or Tilburg were on average stronger and lasted longer than Dortmund which recently had only eight players in a single round robin (7 rounds, 28 games), including some rather inferior german players. Linares and Tilburg had about twelve players at the beginning, in later years also only six, seven (Linares) or eight players, but in a double round robin and near exclusively top players; at Wijk aan Zee, some dutch players were less strong, but Wijk aan Zee invites currently and regularly 14 players (13 rounds, 91 games), including many from the absolute world elite.