Hou Yifan Challenge: Pragg still perfect

by Carlos Alberto Colodro
9/18/2021 – Day 1 of the Hou Yifan Challenge, the last regular event of the Julius Baer Challengers Tour, saw Praggnanandhaa scoring five wins in as many games to take the sole lead. Vincent Keymer won his first four games, but lost against Christopher Yoo in the final round of the day, and now stands in sole second place. Pragg’s sister Vaishali was the strongest among the women, as she collected 2½ points in four games. | Pictured: Vaishali and Pragg with their mother, Nagalakshmi | Photo: Amruta Mokal

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Barely any draws

Due to the odd number of players, five players had a bye round on Saturday. Rating favourites Praggananandhaa and Vincent Keymer — the only two players with a 2600+ rating — were not among them though, and they finished the day as the top scorers with 5/5 and 4/5 points respectively.

Much like Pragg, Keymer collected four wins in the first four rounds, but a loss against Christopher Yoo prevented him from keeping up with his younger colleague’s pace — Keymer was born nine months before Pragg. Yoo’s victory over the German star was no fluke, as the 14-year-old Californian IM was the only player other than the leader to finish the day undefeated (Yoo is in third place at the moment, with 3½/4 points).

Among the girls — six female participants are in the mix — Vaishali Rameshbabu, Pragg’s sister, had the strongest performance on the first day of action. The Indian WGM is on 2½/4, as she only lost against her sibling on Saturday.

Hou Yifan Challenge 2021

Pragg is not only an excellent tactician, but he also knows how to convert a strategic advantage into a win when the opportunity arises. Facing Balaji Daggupati in the first round, the Indian star showed good technique in a good knight vs bad bishop position.

 
Daggupati vs. Praggnanandhaa - Round 1

35.Rd5 was Daggupati’s losing mistake. Pragg quickly swapped the rooks, as his knight will be the stronger minor piece in the technical endgame. Daggupati resigned 20 moves later.

Endgame specialist Karsten Müller sent a more in-depth analysis of Pragg’s instructive win.

 
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1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.0-0 Be7 9.Qf3 Qb6 10.Be3 Qb7 11.Qg3 Nbd7 12.Rfe1 b4 13.Na4 Qxe4 14.Rad1 Qg4 15.Bf4 Qxg3 16.Bxg3 d5 17.Nf5 exf5 18.Bd6 Ne4 19.Bxe7 Kxe7 20.Bxd5 Rb8 21.f3 Ndf6 22.fxe4 f4 23.Nc5 Rd8 24.Nd3 g5 25.Ne5 Bd7 26.Bxf7 Rb5 27.Bd5 Be8 28.Nf3 Bh5 29.Rd3 Bxf3 30.gxf3 h5 31.Bc4 Rc5 32.Rxd8 Kxd8 33.b3 Nd7 Good knight versus bad bishop. The fight bishop against knight can be very deep. Usually the knight wants control to have time for its slow manoeuvres: 34.Rd1? This is too slow. The more radical 34.c3! bxc3 35.Rc1 Ne5 36.Rxc3 is only symbolically better for Black. 34...Ke7 35.Rd5? Another mistake after which White is lost. 35.Rd2 offers more chances to resist. But Black is for choice of course. 35...Rxd5 36.Bxd5 36.exd5 does not defend due to Ne5 37.Kf2 37.Bxa6 Nxf3+ 38.Kg2 g4-+ 37...a5 38.h3 Kd6 39.Ke2 Kc5 40.d6 40.Kf2 a4 41.Ke2 a3 42.Kf2 Kd4 43.Ke2 h4 44.Kf2 Kc3 45.d6 Kb2-+ 40...h4 41.d7 Nxd7 42.Bf7 Kd4 43.Bg6 Ne5 44.Bf5 Kc3 45.Be4 Nf7 46.Ke1 Nd6 47.Bd3 Ne8 48.Bf5 Ng7 49.Bg6 Ne6 50.Be4 Nd4 51.Kd1 g4 52.fxg4 Ne6 53.Ke2 Ng5 54.Bd3 Kd4 55.Kf2 Nxh3+ 56.Kf3 Ke5-+ 36...Ne5 37.Kf2 Kd6 The invasion of Black's king on the dark squares will decide the day sooner rather than later. 38.Bc4 a5 39.Bf1 Kc5 40.h4 This radical approach does not help, but White is lost in any case. 40.Be2 Kd4 41.Bd1 Kc3 42.Ke2 g4 43.fxg4 hxg4 44.Kf2 f3 45.Ke3 Kb2 46.Kf4 Kc1-+ 40...gxh4 41.Kg2 Kd4 42.Kh3 42.Be2 Ke3 43.Bd1 Kd2-+ 42...Nxf3 43.Bg2 Kxe4 44.Bf1 Ke3 45.Ba6 Nd2 46.Kxh4 f3 47.Kxh5 f2 48.Kg5 f1Q 49.Bxf1 Nxf1 50.Kf5 Kd4 51.Ke6 Kc3 52.Kd5 Kxc2 53.Kc5 Kb2 54.Kb5 Kxa2 A real knightmare for White. 0–1
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WhiteEloWBlackEloBResYearECOEventRnd
Daggupati,B2442Praggnanandhaa R26170–12021B87Hou Yifan Challenge 20211.1

While her brother got the better of Daggupati, Vaishali was defending an inferior endgame against Polish IM Pawel Teclaf.

 
Vaishali vs. Teclaf - Round 1

GM Müller reminds us that we should not rush in the endgame, as Teclaf’s 44...f5+ came too early. At this point, the winning move was 44...h4, leaving White in zugzwang.

After Teclaf’s mistake, Vaishali continued to defend until getting the draw six moves later. Do not miss GM Müller’s instructive analysis in the replayer below.

 
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1.d4 Nf6 2.Bf4 e6 3.e3 Bd6 4.Bxd6 cxd6 5.Nf3 0-0 6.Nbd2 Nc6 7.Be2 d5 8.0-0 b6 9.Ne5 Bb7 10.c4 d6 11.Nxc6 Bxc6 12.Bf3 Qd7 13.Rc1 Rac8 14.cxd5 Nxd5 15.e4 Nf4 16.g3 Nh3+ 17.Kg2 Ng5 18.d5 Bb7 19.Rxc8 Rxc8 20.Kg1 Nxf3+ 21.Qxf3 exd5 22.exd5 Qb5 23.Re1 Qxd5 24.Qxd5 Bxd5 25.a3 Kf8 26.Nb1 Rc2 27.Nc3 Bc6 28.Rb1 a5 29.Kf1 d5 30.Ke1 d4 31.Ne2 Rc4 32.Kd2 a4 33.Rc1 Rxc1 34.Nxc1 Ke7 35.Kd3 Ke6 36.Kxd4 Kf5 37.Nd3 f6 38.h3 h5 39.Ke3 g5 40.f3 Bb5 41.Nf2 Bf1 42.g4+ Kg6 43.Kd4 Bg2 44.Ke4 Do not rush. This is an important endgame principle: f5+? Black rushes. Only after 44...h4! (zugzwang) 45.Ke3 is f5 playable and wins as White is in zugzwang, e.g. 46.Ke2 46.gxf5+ Kxf5 47.Nd3 Bxh3 48.Kf2 g4 49.fxg4+ Bxg4 50.Kg2 Ke4 51.Nf2+ Kf4 52.Nd3+ Ke3-+ 46...Kf6 47.Ke3 fxg4 48.Nxg4+ Kf5 49.Nf2 Bf1-+ And the sharp endgame weapon zugzwang decides the day in Black's favor. 45.gxf5+ Kf6 46.Nd1 White is now not in zugzwang as the knight indeed can move. Bxh3 46...g4 does not win either due to 47.hxg4 hxg4 48.Nf2 gxf3 49.Kf4= 47.Ne3 h4 48.Ng4+ Kf7 49.Ke3 Bxg4 50.fxg4 ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
Vaishali R2414Teclaf,P2543½–½2021A45Hou Yifan Challenge 20211.2

Standings after round 5

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Carlos Colodro is a Hispanic Philologist from Bolivia. He works as a freelance translator and writer since 2012. A lot of his work is done in chess-related texts, as the game is one of his biggest interests, along with literature and music.

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