Andrei Istratescu vs Bassem Amin (2008)

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Andrei Istratescu vs Bassem Amin
Dresden Olympiad (2008), Dresden GER, rd 1, Nov-13
Dutch Defense: Classical. Ilyin-Zhenevsky Variation General (A97) · 1-0

ANALYSIS [x]

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< Earlier Kibitzing · PAGE 2 OF 3 · Later Kibitzing>
Sep-04-10		krakukas: 63...? My solution is <63...Rf1+> 64. Kxg5 Rg1+ 65. Kf5 Rxg6 draw, since 66.Kxg6 is stalemate or 64. Kg4 Rg1+ 65. Kf4 Nh3+ 66. Kf5 Rg6 67. Kxg6 Nf4+ draw or 64. Ke5 Nf3+ and 65...Kxg7 draw

Sep-04-10		patzer2: For today's Saturday endgame puzzle solution, either 63...Rf1+! or 63...Nh3! lead to a draw. Black has at least two tempting replies he needs to avoid. In the actual game, 63...Ne6?, leads to a lost position after the in between move 64. Bh7+! . Black also needs to avoid the tempting 63...Nf7?, which loses to 64. Kf6! Rf1+ 65. Rf5! Rxf5+ 66. Bxf5 Nh6 67. Be6+ Kh7 68. h5! with mate to soon follow.

Sep-04-10		RandomVisitor: 63...Rf1+: click for larger view Rybka 3: <27-ply> [+0.00] 64.Kxg5 Rg1+ 65.Kf6 Rxg6+ 66.Kxg6 [+0.00] 64.Kg4 Rg1+ 65.Kf4 Ne6+ 66.Ke4 Rxg6 67.Rd5 Kh7 68.h5 Nxg7 69.hxg6+ Kxg6 [+0.00] 64.Ke5 Nf3+ 65.Kd6 Kxg7 66.Be4 Rd1+ 67.Kc5 Nxh4 68.Kc4 Nf5 69.Kc3 Ng3 70.Rh7+ Kf6 71.Bc2 Ne2+ 72.Kc4 Rd2 73.Rh6+ Ke5 74.Rh5+ Kd6 75.Rh6+ Ke5 76.Rh5+ Kd6 77.Rh6+ Ke5 78.Rh5+ Kd6 79.Rh6+

Sep-04-10		Rook e2: How is it that the most players here solved this puzzle but a grandmaster didn't?

Sep-04-10		Marmot PFL: How bout 63...Rf1+ 64 Kxg5 Rg1+ 65 Kf5 Rxg6 66 Rg5 Rxg7 67 Kf6 Kh8! 68 Rg6 Ra7. There are other lines but the basic idea seems to work, and black has no other chance anyway (which actually makes these ideas easier to find).

Sep-04-10		Marmot PFL: Time pressure or tiredness would be the most likely explanations.

Sep-04-10		Marmot PFL: <patzer2:> So Nh3 also draws, interesting. Just shows that the rook pawn and wrong color bishop is a weak team.

Sep-04-10		LIFE Master AJ: Saturday; September 4th, 2010. Black to play, (move # 63... '?') Down material, Black is forced to play for a draw. I analyzed this one last night for a long time. I went to bed with my head swimming in lines. (I had a headache, too.) I woke up this morning, and everything is simple. 63...Rf1+!; 64.KxN/g5, Rg1+; 65.K-any, RxB/g6! If White re-captures, its stalemate. If White does not capture, the resulting endgames, (K+P AND R+P); are all dead ("book") draws. Looking through the kibitzes, I find that Dzechiel has already discovered the correct drawing method. I think that Black played 63...Ne6?, hoping for 64.KxN??, RxB/g6+; with a draw, but White found something a tad better. (Zwischenzug = 64.Bh7+)

Sep-04-10		apiana: so white wins anyway why should i search for a solution for black??? not to get immediately mated or what??

Sep-04-10		LIFE Master AJ: <Sep-04-10 Rook e2: How is it that the most players here solved this puzzle but a grandmaster didn't?> I think that this post also applies here: Z Franco-Ocampos vs J Sequera, 2002.

Sep-04-10		Patriot: I opted for 63...Nh3, which should be a pretty simple draw. I was also looking at 63...Ne6, but decided against it because 64.Bh7+ followed by 65.Kxe6 looked lost. It's interesting that I didn't see 63...Rf1+ since I'm always pushing to look at "checks, captures, and threats" (in that order). The reason is that when I looked over the position and saw that black's goal is a draw and that the only way black could win is a forced mate, which isn't going to happen, I started looking for ideas on how to draw (not just forced sequences). The idea for 63...Nh3 is for example 64.Kf6 (threatening 65.Rh8#) Rxg6+ 65.Kxg6 Nf4+ 66.Kg5 Nxh5 67.Kxh5 Kxg7 draw. 64.Be8 Kxg7 looks drawish, thanks to the rook pawn. The only other defense I could think of is 64.Rh7. Perhaps 64...Ng5 is good enough (65.Rh5 Nh3 or 65.Rh6 Kxg7).

Sep-04-10		paulalbert: It was clear that the stalemate idea was there and I thought Rf1ch immediately which seemed to work. Did not look at Nh3, but saw other N moves did not work.

Sep-04-10		caissafan1963: Rf1+ seemed very easy to find, and the stalemate theme isn't anything new. I didn't consider Nh3, but after seeing Rf1, why look further? Personally, I thought this puzzle belonged on a Thursday maybe.

Sep-04-10		kevin86: Pshaw,black missed the draw!

Sep-04-10		Jimfromprovidence: I did not find an easy win for white after the text 63 ...Ne6?, because it is anything but easy. I plugged the position into the Nalimov tablebase applet after 65... Re1+. With best play, here is the position a few moves later. click for larger view Now it's white to play and mate in 22 moves. By the way, again with best play by black, with each of the next three white moves there is only one winning move.

Sep-04-10		LIFE Master AJ: <Jimfromprovidence> click for larger view White: King-on-e5, Bf5, Rg3. Black: King-on-h4, Rf8. 1.Rg6 Rb8; 2.Kf4 Rb4+; 3.Be4 Rb5; 4.Rg8 Ra5; 5.Rg2 Ra3; 6.Bc2 Rc3; 7.Bf5 Rc4+; 8.Be4 Rc3; 9.Rg4+ Kh3; 10.Rg6 Kh2; 11.Rg2+ Kh3; 12.Rd2 Rc4; 13.Rd1, and White wins. (Some people may not have those tools, to give that position ... without the solution ... could be considered a "tease" here ... ... ...

Sep-04-10		Sneaky: So Rf1+ is the answer?

Sep-04-10		Once: <Sneaky: So Rf1+ is the answer?> It looks like 63. Ne6 was a mistake by white which cost him the game. Instead, he would probably have drawn with either 63. Rf1+ or 63. Nh3.

Sep-04-10		wals: Nalimov Tablebases. Black to move....65. Rc1, Ra1, lose in 22. Rf1, Re1, Rd1, Rh1, lose in 21 Rg2, Rg3, lose in 19. Rg5, lose in 14. Kf8, lose in 14. Kh8, lose in 10. Rg6, lose in 5. Rg4, lose in 4. Rb1, lose in 3.

Sep-04-10		Jimfromprovidence: <LIFE Master AJ> Whenever I find an interesting turn of events with these puzzles that I think is beneficial to the group, I've posted it from time to time. People can take it or leave it; I post these things in an attempt to get the kibitzers to try to work out a tough solution to a problem that they may not have yet encountered. The solution comes later, after a few attempts to solve have been made. In any case, the link to the Nalimov data base is below. Anyone can access it. It's a fantastic tool. http://www.k4it.de/index.php?topic=... In this case., the point was to try to get people to take a deeper look as to why 63... Nc6 does not work.

Sep-04-10		wals: Black's move(+5.26): 63...Ne6 was a blunder. Bettter was:- Analysis by Rybka 4 x64:depth 27. 1. (0.80): 63...Rf1+ 64.Kxg5 Rg1+ 65.Kf5 Rxg6 66.Rg5 Rxg7 67.Kg4 Kh8 68.Kh3 Kh7 69.Ra5 Kh6 70.Ra3 Rd7[ 63...Nh3, 1.15, could have also been considered.

Sep-04-10		David2009: Istratescu vs B Amin, 2008 Black 63...? I think there was a double blunder here. In the diagram position Rh6 should win for White (the threat is Kf6) : as played Rh5 should have allowed Nf3 drawing click for larger view (Istratescu vs Amin 2008, 63?) My original draft kibitz in Notepad is too long and dull to post. I had analysed Rf1+ as a loss, then various N moves/sacrifices as losses, finally discovering 63...Nh3 which draws. 64 Kf6 is met by 64...Rxg6+ 65 Kxg6 Nf4+ drawn. 64 Rh7 is met by Nf4 e.g. 65 Bf7+ Kxf7! = Time to check against Crafty End Game Trainer: if I am right White wins with 63 Rh6, draws with 63 Rh5: http://www.chessvideos.tv/endgame-t... ===== Well I am wrong on the first count: Black still draws after 63 Rh6 with 63...Nf7! I am right that Rh5 draws - it gives the puzzle position - but for the wrong reasons. The best defence is as played by Crafty EGT: 63...Rf1+! 64 Kxg5 Rg1+! 65 Kf6 65 Rxg6+ and 66 Kxg6 gives stalemate. For some unaccountable reason I had missed this but I HAD seen that after Kh6 (instead of Kf6) Rxg6+ FORCED Kxg6 with stalemate. Chess blindness takes very odd forms. 63...Nh3 also draws but White can give Black a hard time with 64 Rh8+! Try this with Crafty colours reversed: http://www.chessvideos.tv/endgame-t... Not as easy to draw as it looks after starting Nh6 (in the colours-reversed board): of course Rf8+ is a simple draw.

Sep-04-10		echever7: Well, black can't win this one. THe white rook is kind of traped but is of not use for black right now. At first glance it seems not so difficult. 62...Nh3 with the idea Rxg6-Nf4 1/2-1/2 black create two menaces 63...Rxg6 and 63...Kxg7 Let's see: a- 63.Kf6-Rxg6+ 1/2 1/2 (there's a remote possibility of mating the white king after this variant, with whites' big cooperation of course). b.63.Rh7-Nf4 64.h5-Nxg6 65.hxg6-Rxg6 1/2 1/2 (the amazing 63...Rxg6 64.Kxg6-Nf4+ 65.Kh6-Ng6 fails because 66.h5) b-63.K moves-Rxg6 c- 64.Bishop moves-Kxg7 or Rxg7 I must confess that I can' see any winning line for white so the label "difficult" seems to me a little suspicious. May be I'm missing something...

Sep-04-10		WhiteRook48: i had 63...Rf1+ 64 Kxg5 rg1+ 65 Kf5 Rxg6 66 Rh8+ Kxg7 and white cannot win 64 ke5 and 64...kxg7 65 rxg5 rxg5 66 hxg5 kxg6 67 kf4 kg7 =

Sep-04-10		benveniste: I see the ♖f1+ lines, but I can't see the draw after ♘h3 and ♖h8+. Can someone please sketch out that line for me?

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