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Ulhumbrus
Member since Sep-27-04 · Last seen Sep-25-17
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   Ulhumbrus has kibitzed 21363 times to chessgames   [more...]
   Sep-25-17 Aronian vs Ding Liren, 2017 (replies)
 
Ulhumbrus: The game has fizzled out. It has probably occurred to Aronian that in order to preserve winning chances he had to avoid too many exchanges of pieces eg 22 Bh3 ( instead of 22 Rac1) which allows 22...Rc7, or 25 Bg2 which allows 25...Rc8.
 
   Sep-24-17 Ding Liren vs Aronian, 2017 (replies)
 
Ulhumbrus: The changes in the computer evaluations on the official site suggest that 58...Nc5 instead of 58...Nc3 reduces Black's advantage although not enough to save White, 59...Ke5 instead of 59...Ne4 reduces such advantage as Black has by more than a half so that White may have drawing ...
 
   Sep-23-17 Aronian vs Ding Liren, 2017 (replies)
 
Ulhumbrus: White can muster superior force on the king side while Black may be able to muster superior force on the queen side. According to Lasker a player is advised to start a fight on the part of the board where he can muster superior force. This suggests that the moves 17...Raf8 ?! and ...
 
   Sep-19-17 Sosonko vs M Rivas Pastor, 1978
 
Ulhumbrus: < luzhin: For what it is worth, my computer program considers 19...Nd7! to be far superior to 19...Rd7. It would be interesting to know why Rivas, having seen the general concept, chose the rook sac.> How about this for one reason: 19...Rd7 attacks the d5 pawn whereas ...
 
   Sep-18-17 Svidler vs M Vachier-Lagrave, 2017 (replies)
 
Ulhumbrus: Although, as a commentator on the chessbase websites indicates, after 21..Kc7!! 22 Rc1 gxf5 White has no good discovered attacks, he may have one which at least reduces Black's advantage after 23 Bd5+! Bc6 24 Qxd6+ Kxd6 25 Bxc6. The computer analysis gives 25...bxc6 26 exf5 ...
 
   Sep-16-17 Aronian vs Ivanchuk, 2017 (replies)
 
Ulhumbrus: 5...b5 makes the c6 pawn backward and both the c and b pawn potential targets. 10...c5 opens lines with Black's king uncastled and Black's king side completely undeveloped. One commentator on the chessbase website has indicated that this is a mistake. Perhaps Ivanchuk thinks that ...
 
   Sep-14-17 Bu Xiangzhi vs Svidler, 2017 (replies)
 
Ulhumbrus: Svidler turns an English symmetrical into what looks like a favourable variation of the Nimzoindian defence. 20 Qc4 looks like a blunder which exposes White's bishop on c4 and the rook on d5 to the skewer ...Be6. However with his c3 pawn attacked White is in some trouble already.
 
   Sep-13-17 Ivanchuk vs A Giri, 2017 (replies)
 
Ulhumbrus: 9...0-0-0 offers White the d5 pawn but also exposes the black queen to the pin Bg5. An alternative way to offer the d5 pawn as a sacrifice is 9...Qg6. 15...b6 disturbs the queen side pawns without necessity. The moves 15...b6 and 9...0-0-0 suggest that Giri did not want to draw ...
 
   Sep-12-17 Svidler vs Onischuk, 2017 (replies)
 
Ulhumbrus: One objection to the advance 14...d5 is that Black's central pawns may become a target whereas Black would like them to become a weapon instead eg a fortress behind which he can manoeuvre a knight to f4.
 
   Sep-12-17 Kramnik vs Ivanchuk, 2017 (replies)
 
Ulhumbrus: After 14...a5 White's worst placed piece appears to be his queen's knight on d2. Instead of 15 a3, 15 cxd5 Nxd5 16 Bg3 gains the square e4 for the knight on d2.
 
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