Noteboom was born in Noordwijk and learned to play chess at the age of 12, at 14 won a local tournament in Noordwijk and at the age of 15 he was admitted to the Leiden Chess Society as an exception because at the time chess clubs were generally reserved for adult men with social standing.
In the next few years he won the championship of the club three times. Shortly after playing at Hastings 1931/2, he soon died of pneumonia in London. A variation of the Queen’s Gambit is named after him. 
The 25th Daniel Noteboom Memorial, played in Noordwijk in February saw the return to tournament play of former World Champion Mikhail Botvinnik who, at the “advanced” age of 54 years old, romped through the field.
Larsen’s poor performance plus another poor performance at Zagreb was viewed as an indication that he had poor chances in his upcoming Candidates Match against Borislav Ivkov. It wasn’t. He crushed Ivkov by a score of 5.5-2.5.
In the semi-finals of the Candidates Larsen was edged out by Tahl. The score was tied 4.5-4.5 and Tahl won the final game.
The tournament was held from February 21 to 28, 1965, and the notable participants were former world Mikhail Botvinnik, Danish sensation Bent Larsen and Salo Flohr.
Jan Hein Donner. Jacob Kort and Carl Van den Berg were the Dutch players. The others were Bulgarian GM Milko Bobotsov and Yugoslav GM Dr. Petar Trifunovic.
Today’s game features Flohr’s win over Larsen. The latter is well remembered. The “Great Dane” Bent Larsen (1935 - 2010) was known for his imaginative and unorthodox style of play and for being the second strongest non-Soviet player, behind Bobby Fischer, for much of the 1960s and 1970s.
Few will remember the Czech and later Soviet player and writer Salo Flohr (1908-1983) November 21, 1908 – July 18, 1983) who dominated many tournaments of the pre-World War II years and by the late 1930s was considered a contender for the World Championship. However, his style became more quiet and positional (i.e. boring) and he became content to draw almost all of his games.
Salo Flohr–Bent Larsen1–0B39Noteboom Memorial, Noordwijk23.02.1965ShashChess 32
Sicilian: Maroczy Bind 1.f3 g6 2.c4 g7 3.c3 f6 4.e4 c5 5.d4 cxd4 6.xd4 c6 7.e3 g4 8.xg4 xd4 9.d1 e6 10.d2 0-0 11.e2 d6 12.0-0 d7 Worth considering was 13.b4 13.f4 13.fd1 c6 14.f3 a6 15.d5 is equal.
Cmilyte,V (2524)-Danielian,E (2476) Beijing 2012 13...c6 14.f3 14.f5 c5 15.f3 a5 16.h6 b6 17.xg7 xg7 is equal. Spassky,B (2655)-Savon,V
(2575) Moscow 1973 14...b6 14...a5 is much more promising. 15.d5 xd2 16.xd2 xd5 17.cxd5 d4+ 18.h1 c5 is good for black. 15.b4 White is
better here and he also had a promising continuation in 15.f5 15.f5 c5 16.h6 e5 This offer of the exchange is black's best chance. 17.xf8 xf8 18.b4 d7 White can only claim a small advantage owing to the sctivity of
black's pieces and his better P-structure. 15...c8 16.ac1 f5 This is
risky because it loosens black's position, but Larsen was never afraid of
taking a risk. 16...e8 17.fd1 f8 18.a4 b7 position is the more
promising. Birnboim,N (2200)-Vilela,J (2260) Graz 1972 17.d5 d7 17...xd5 eliminating the well placed N is not at all good. 18.xd5 This move
inflicts a fatal pin on the N. d7 19.c5 c7 19...h8 20.c6 20.cxd6
is decisive. 18.exf5 gxf5 19.fe1 d8 Now comes a huge surprise. White
switches his attack to the Q-side. 20.xb6 Surprise! e6 20...axb6 21.xe7 Decisive. The Q is trapped. 21.xb6 is obvious, but black
stands well after a7 22.c5 c7 23.d5 b7 21...c7 22.ce1 a7 22...c8 23.xc7 xc7 24.xc7 23.xd7 xd7 24.xb6 White is winning. 21.xd8 fxd8 22.b5 Making room for the N to reposition itself. b7 22...xd5 is slightly better. After 23.cxd5 xc1 24.xc1 e5 25.fxe5 xe5 26.a4
with a favorable endgame. 23.b4 xf3 24.gxf3 In a few moves white will
use the open g-file to his advantage. h8 24...d5 counterattacking is a
better practical choise, but white still has a much better position. For
example... 25.ed1 25.cxd5 xb5 26.xc8 xc8 27.dxe6 c5+ 28.h1 c3 29.g2+ h8 30.d3 c4 31.d1 xe6 Black has nearly equalized. 25...d4 26.d3 b7 27.e2 and white is clearly better. 25.c6 g8 26.h1 a6 27.a4
axb5 28.axb5 d5 White has a dominating position and as before,
this move offers black little in the way of compensation. 29.g1 29.cxd5
Unlike in the previous variation this move is bad here because of exd5 30.e5 b7 31.xc8 xc8 32.d3 with a winning ending. 29...f6 30.cxd5
White has a number of playable moves here including 30.Ne5 and 30.Rxg8+ 30.e5 This is probably the best though. b7 31.xg8+ xg8 32.cxd5 h6 33.d4 h7 33...xb5 is tactically faulty. 34.f7+ g7 35.a7 b8 36.g1+ h7 37.g5+ mate next move 34.c5 with a won ending. 30...exd5 31.xg8+ xg8 32.g1 This turns out to be a mistake that allows Larsen to
equalize. A rather surprising error from a player of Flohr's level...
Chessmetrics estimates his rating in 1966 to have been about 2600 placing him
in the world's top 60. Larsen's estimated rating was 2699 placing him at #16. 32.d1 is more precise. e8 33.d4 33.xd5 loses e1+ 33...c7 34.xf5 and white is much better. 32...xg1+ 33.xg1 d4 The d-Pawn makes
itself felt! 34.d3 d5 35.f1 g7 36.e5 c5
Even with the reduced material Larsen makes an instructive tactical blunder
that loses the game because his K is subjected to a winning attack! 36...xe5 completely equalizes after 37.fxe5 37.xf5 is alosing blunder. xf3+ 38.g1 xf4 39.h3 Black has a won ending. 37...xe5 is a likely
draw. 37.c4 A nasty surprise. 37.xf5 xb5+ and it's doubtful white
could make any progress. 37...d6 37...xc4+ 38.xc4 f7 39.b6 d8 40.e5+ e6 41.b7 c7 42.c6 d7 43.b8 xb8 44.xb8+ wins 37...a7
keeps the Qs on and gusrds the 7th rank, but white's position is still vastly
superior after 38.d5 xe5 38...a1+ 39.g2 b2+ 40.g3 xe5 40...xb5 41.f7+ mates in 2 41.xe5+ g8 42.e6+ and wins 39.xe5+ f7 40.xf5+ 38.f7+ h6 39.g8 Black resigned. The threat of 39.Nf7+ forking the
Q and K cannot be met. 39.g8 xe5 39...h5 40.xh7# 40.g5# 1–0
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