New leading trio at the Kader-Challenge

by Klaus Besenthal
4/10/2021 – In Round 7 of the Kader-Challenge in Magdeburg, Alexander Donchenko leapfrogged previous leader Rasmus Svane by beating him in their direct encounter. Two players previously equal on points with Donchenko also won their games, so the standings table is now headed by a trio: Matthias Bluebaum, Dmitrij Kollars and Donchenko. In the women’s competition, Jana Schneider is still the sole leader with two rounds to go. | Photo: Kevin Högy
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Kader-Challenge 2021

Round 6 was played on Friday morning. Rasmus Svane, who was leading the standings at that point, played an 18-move theoretical variation against Dennis Wagner before surprising his opponent with a novelty that involved an exchange sacrifice. The strong idea did not quite work as Svane quickly played an imprecise move and subsequently got into trouble. In the end, Svane managed to save the half point. It was, undoubtedly, an exciting game:

 
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1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0 Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 Be6 9.c3 Be7 10.Nbd2 Nc5 11.Bc2 d4 12.Nb3 d3 13.Bb1 Nxb3 14.axb3 Bf5 15.Be3 0-0 16.Bd4 Qd5 17.Re1 Rfd8 18.h4 d2 19.Bxf5 dxe1Q+ 20.Qxe1 Qxb3! 21.Qe4?! 21.h5! 21...Nxd4 22.Nxd4 Qxb2 23.Rf1?! 23.Bxh7+ Kh8 23...Kf8 24.Ne6+ fxe6 25.Qf3+ Bf6 26.Rb1 Qd2 27.exf6 Qh6 28.fxg7+ Kxg7 29.Be4 24.Rf1 23...Qxc3 24.Nc6 Kf8 25.Bxh7 a5?! 25...Re8! 26.h5! a4 26...Re8! 27.h6 gxh6 28.Nxe7 Kxe7 29.Qh4+ Ke8 30.Qf6! Rab8 31.Qh8+ Ke7 32.Qf6+ Ke8 33.Bg6 33.Qh8+ Kd7?? 34.e6+ 33...fxg6 34.Qxg6+ Kf8 35.Qxh6+ Kg8 36.Qg5+ Kf8 37.Rc1 Qd2 38.Qf6+ Ke8! 38...Kg8?! 39.Rxc7 Qd1+ 40.Kh2 Qh5+ 41.Kg3! 39.Qe6+ Kf8 40.Qf6+ Ke8 41.Qe6+ Kf8 42.Qf5+ Ke7 43.Rxc7+ Rd7 44.Qf6+ Ke8 45.Qh8+ Ke7 46.Qh4+ Ke8 47.Qh8+ Ke7 48.Qf6+ Ke8 49.Qh8+ ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
Svane,R2613Wagner,D2581½–½2021C83DSB-Kader-Challenge 20216.3

Rasmus Svane | Photo: Frank Hoppe

For Frederik, the younger of the Svane brothers, it was high time to score a win after losing three in a row. In his game against Niclas Huschenbeth, he succeeded. Karsten Müller analysed the endgame:

 
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1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bd6 5.0-0 0-0 6.d3 h6 7.Ne2 Re8 8.c3 a6 9.Ba4 Bf8 10.Ng3 d5 11.exd5 Qxd5 12.Re1 Bg4 13.h3 Bxf3 14.Qxf3 Qxf3 15.gxf3 Rad8 16.Rd1 Nd5 17.Kf1 Re6 18.Bb3 Rf6 19.Bxd5 Rxd5 20.Ke2 g6 21.h4 h5 22.Rg1 Bg7 23.Bg5 Re6 24.Rad1 f6 25.Bc1 f5 26.Kd2 Kf7 27.Kc2 Bf6 28.Rh1 b5 29.f4 b4 30.Ne2 bxc3 31.bxc3 Rc5 32.fxe5 Rexe5 33.Be3 Ra5 34.Ra1 Ra3 35.d4 Re4 36.Nf4 Na5 37.Bd2 Nc4 38.Bc1 Be7 39.Kd3 Ra4 40.f3 Ne5+ 41.dxe5 Rxf4 42.Bxf4 Rxf4 43.Rh3 Bxh4 44.Rb1 a5 45.Rb5 The power of coordination In this case White's rook h3 is not coordinated with the rest of the forces, which Black must try to exploit quickly: Ra4? This slow move gives White time to coordinate his forces. The active 45...Be1 is called for, e.g. 46.Ke2 46.Rxa5 h4 47.Rh1 Bg3 48.Ke2 Rc4 49.Kd2 Rf4= 46.Rc5 h4 47.Rxc7+ Ke6 48.Rc6+ Kxe5 49.Rxg6 Bg3= 46.Rh1 Bg3= 46...Bxc3 47.Rc5 Bb4 48.Rxc7+ Ke6 49.Rg3 Kxe5 50.Rxg6 Rh4 and Black's activity probably saves the day. 46.Rc5 Bd8?! This retreat looks artificial. 46...Ke6 was more tenacious, but after 47.Rc6+ Kxe5 48.Rxg6 Be7 49.Rh2 White should win as well in the long run. 47.Rh2 The invasion of this rook will decide the issue. h4 48.Rd5 Be7 49.Rd4!? This intermediate move is good technique. The direct 49.Rd7 wins as well, e.g. c6 50.Rc7 Rf4 51.Ke3 Rc4 52.Rb2+- 49...Ra3 Now Black goes down in flames. But 49...Rxd4+ 50.cxd4 Of course not 50.Kxd4?? g5= 50...g5 does not defend due to 51.Rc2 h3 52.Ke3 Ke6 53.Kf2+- 50.Rd7! Ke6 51.Rxc7 g5 52.f4 g4 52...gxf4 53.Rb2+- does not change the picture. 53.Rb2 The second rook finally enters the attack with decisive effect. Bb4 54.Kd4 h3 55.cxb4 g3 56.Rbc2 56.Rbc2 g2 57.R2c6# 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Svane,F2421Huschenbeth,N26041–02021C48DSB-Kader-Challenge 20216.5

Ein Remis gab es zwischen Andreas Heimann und Alexander Donchenko, die sich somit beide auch nach der 6. Runde einen halben Punkt hinter Rasmus Svane einreihen mussten. Für den Endspiel-Experten war dies aber eine interessante Partie: T+S gegen T+L - das ist meistens spannend! Karsten Müller hat das Wort:

 
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1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 e5 7.Nf3 Be7 8.Bc4 0-0 9.0-0 Be6 10.Bb3 Qc8 11.Nd5 Nxd5 12.Bxd5 Bxd5 13.Qxd5 Nd7 14.Qd3 Qc6 15.Rfd1 Rac8 16.Rac1 b5 17.Nd2 Nc5 18.Bxc5 dxc5 19.Nf3 Rfd8 20.Qe2 c4 21.c3 Bf6 22.h3 g6 23.Ra1 a5 24.a3 h5 25.Ne1 Kg7 26.Kf1 Rb8 27.Qe3 Rd6 28.Rxd6 Qxd6 29.Qe2 Qc6 30.Rd1 b4 31.axb4 axb4 32.Nc2 bxc3 33.bxc3 Rb2 34.Nb4 Qa4 35.Qf3 Bg5 36.Nd5 Qc2 37.Kg1 h4 38.Ra1 Qd3 39.Qxd3 cxd3 40.Rd1 f5 41.f4 Bd8 42.Rxd3 fxe4 43.Rd1 exf4 44.Re1 f3 45.gxf3 exf3 The bishop hunt The duel rook and bishop against rook and knight can be very deep: 46.Re6? This gives Black a chance. White should start the hunt with 46.Re8! when the draw is more or less clear, e.g. Bg5 46...Ba5 47.Ra8 Ra2 48.Ra6= 46...Rg2+ 47.Kf1 Bg5 48.c4= 47.c4 Rc2 48.Re5 Bf6 49.Re4 Bb2 50.Rf4 g5 51.Rxf3 Rxc4 52.Ne3= 46...Bg5? Black misses a deep point. 46...g5 was called for due to 47.Re4 Rd2! c3-c4 should be provoked so that the bishop can escape the hunt. 48.c4 Rg2+ 49.Kf1 Rg3 50.Rd4 50.Re8? Bf6 51.Re6? Bd4-+ is the point of the provocation. 50...Rxh3 51.Kf2 Rh1 52.Kxf3 Rg1 and Black has good chances to win despite the wrong rook's pawn as White's blockade does not look solid. So I guess that Black is winning, but this question also is very deep. 47.c4 Now White's counterplay gives him a draw. Rg2+ 48.Kf1 Rh2 48...Rc2 49.Re5 Kh6 49...Bc1 50.Re7+ Kf8 51.Re6 Rxc4 52.Rxg6= 50.Ne3 Bxe3 51.Rxe3 Rxc4 52.Rxf3= 49.c5 Rxh3 50.Kf2 Kf7 50...Rh1 51.Kxf3 Rc1 52.c6 Kf7 53.Rd6= 51.Re5 Bf6 52.Re4 g5 53.c6 Rh2+ 54.Kxf3 Rc2 55.c7 h3 56.Re2 Rc4 Of course not 56...Rxe2? 57.c8Q h2 58.Qb7+ Be7 59.Qb1 Rc2 60.Ne3 Rb2 61.Qh7+ Ke6 62.Qh3+ Kf7 63.Qh5+ Ke6 64.Nd1 Rb4 65.Qxh2+- 57.Kg3 g4 58.Rf2 Ke6! 59.Nxf6 Rc3+ 60.Kxg4 h2 61.Rxh2 Kxf6 62.Rh6+ Ke7 63.Rh8 Rxc7 64.Rh7+ Kd6 65.Rxc7 Kxc7 ½–½
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WhiteEloWBlackEloBResYearECOEventRnd
Heimann,A2606Donchenko,A2659½–½2021B90DSB-Kader-Challenge 20216.2

In Round 7, alongside Kollars and Donchenko, the current number one in the German ratings list climbed to the top of the table. Matthias Bluebaum’s victory over Andreas Heimann was, leaving aside a few imprecisions, extremely impressive:

 
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1.d4 d5 2.Nf3 Nf6 3.c3 c6 4.Bf4 Bf5 5.Nh4 Be4 6.Nd2 e6 7.Qb3 Qb6 8.f3 Bg6 9.e3 Be7 10.g4 c5 11.Nxg6 hxg6 12.h4 Nc6 13.Be2 Nd7 14.g5 Rc8 15.Qxb6 axb6 16.Kf2 Bd8 17.Rh3 Bc7 18.Bxc7 Rxc7 19.Rah1 Rc8 20.Nf1 Ra8 21.a3 Ke7 22.Ng3 Kd6 23.Bd3 Raf8 24.Rd1 Ne7 25.Ne2 Nb8 26.Nf4 Nbc6 27.Rdh1 Rc8 28.h5 gxh5 29.Nxh5 Rcg8 30.Rh4 g6? 31.Nf6 Rxh4 32.Rxh4 Rf8 33.Rh7 e5 34.dxe5+ Nxe5 35.Bb5! N7c6 36.f4 Nd7 37.Nxd7 37.Ng4! 37...Kxd7 38.e4 dxe4 39.Ke3 Kd6 40.Kxe4 Re8+ 41.Kf3 Re7 42.Bc4 Nd8 43.Rh8 Ne6 44.Kg4 Kd7 45.f5 45.Bb5+! Kd6 46.f5 gxf5+ 47.Kxf5 Ng7+? 48.Kf6 45...gxf5+ 46.Kxf5 Ng7+ 47.Kf4 47.Kf6?? Ne8+ 47...Ne6+ 48.Kg4?! 48.Bxe6+! Kxe6 48...Rxe6 49.Rf8 Re7 50.Kf5 48...fxe6 49.g6 49.Rh6+ Kd7 50.Rxb6 48...Nc7 49.Bd3 Nd5? 49...c4! 50.c4! Ne3+ 50...Nc7 51.Bf5+ 51.Kf3 b5 52.cxb5 Nd1 53.Bf5+ Kc7 54.Rh2 Kb6 55.Be4 Rd7 56.Rh7 Rd2 57.Kg3 Rd4 58.Bf3 1–0
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WhiteEloWBlackEloBResYearECOEventRnd
Bluebaum,M2670Heimann,A26061–02021D02DSB-Kader-Challenge 20217.5

Also leading — Dmitrij Kollars | Photo: Frank Hoppe

Results - Round 6

 

Results - Round 7

 

Standings after round 7

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Women’s section

Fiona Sieber defeated Annmarie Muetsch in a rook ending with an extra pawn, which alone took about 60 moves. However, she did not change the situation at the top of the standings table with her victory.

Fiona Sieber | Photo: Frank Hoppe

Results - Round 5

 

Standings after round 5

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Klaus Besenthal is computer scientist, has followed and still follows the chess scene avidly since 1972 and since then has also regularly played in tournaments.

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