Author: Howard Exner
Date: 00:12:35 02/04/98
Go up one level in this thread
On February 03, 1998 at 15:52:30, Amir Ban wrote: > >Yet another chapter in the ECM saga: > > >No. 411 (Qxd6): > >I get the simple gxh7. Trying Qxd6, it gets about the same score (+3.5). >The position is already very unbalanced anyway, so there may be more. > >Recommend: Scrap it, or add gxh7. Rebel 8 gets 3.16 for Qxd6 and 2.26 for gxh7. My subjective view is that Qxd6 is more decisive. > > >No. 422 (f4): > >I find Qh4 (+92). f4 gets about the same, but I can't find a convincing >continuation after f4 exf4 e5 (or Rb6). > >Recommend: Vague. Drop it. Book is 1.f4 exf4 2.e5 fxe5 3.bxg6 Bc8 4.Rb6 1:0 Is there better choices for black? > > >No. 425 (Ng4+): > >The Ng4+ idea works, but I prefer the intermediate Bf5 Qg2 Ng4+. > >Recommend: Add Bf5. Agree > > >No. 427 (Ne2+): > >Perhaps I have the position wrong. Black is already a queen down and it >looks hopeless. I find Rxg4 for the exciting score of -1209. > >Recommend: Find what the right position is. The Black Queen is on e6 but the key move might want to be changed to Rxg4. > > >No. 434 (Ncxd6): > >This is fairly difficult. Nbxd6 is a transposition. > >Recommend: Add Nbxd6. Agree > > >No. 440 (Rf3): > >It looks wrong: Rf3 Bd1 and black has egg on his face. > >Recommend: Drop it. Agree as the book missed your Bd1 defense. > > >No. 462 (Nxg6+): > >Wrong position again. I get Qxh7 mate. Mate-in-one problems are rather >easy, for me at least. > >Recommend: Find what the right position is. Remove the white rook on h6. However the move Nxg6 looks too easy. Rebel 8 sees a mate in 0 seconds. > > >No. 464 (e5): > >I cannot find the justification for e5. If the idea is e5 dxe5 Ne6 then >counting material actually black gains by it. > >Recommend: Investigate. after black plays dxe5 the book continues with Nf3. Black's defense is not right and I agree that this is a vague position. Drop it as white has other good first moves. > > >No. 467 (Rf6): > >I don't see a winning line after Rf6 Qf8 or Ng5. Perhaps it's the best >move, but the assignment is "white wins" and I don't see it. > >Recommend: Investigate. The main book line is the Ng5 defense and loses to Rxg5 but Qf8 seems to hold. > > >No. 470 (Nc3+): > >I don't think this works: 1...Nc3+ 2.Nxc3 bxc3 3.b3 Ra8 The book gives Qa6 here and continues 4.Rd4 Ra8 5.Ra4 Qxa4! 0-1 >4.Bd4 and if the >c-pawn falls, what is black's threat ? If now 4...Bc5 5.Qg3. > >Recommend: Investigate. > > >No. 475 (Rh5): > >Probably correct, but I'm not sure. I followed 1.Rh5 Ne2+ 2.Kh1 Ng3+ >3.hxg3 Qxf1+ 4.Kh2 now I see that 4...f6 loses but perhaps 4...h6 5.Bxh6 >g6 holds. Be3 will force a mate. >If it's correct, it should be extremely difficult. Yes this will be a tough one. > >Recommend: Investigate. > > >No. 482 (Bxb5+): > >I get h4. Different plan, similar result (+115). > >Recommend: Add h4. Bxb5+ seems more forceful. > > >No. 488 (Bh3): > >I think it's wrong: Bh3 Ne1 and black is worse than ever. > >Recommend: Drop it. > > >No. 489 (Ne4): > >It's wrong: 1...Ne4 2.Nxe4 Rg6 3.Rf1! and if 3...Qe8 4.Rf8+! teaches >black a lesson. > >Recommend: Drop it. Agree > > >No. 497 (f5): > >After f5 exd4 I can't find anything to justify a piece (fxg6 hxg6 Bxg6 >Nf8). > >Recommend: Investigate. Nf8 is the book defense and continues 4.Bxf7+ Kxf7 5.g6+ Kg7 6.Rdf Bf6 7.Rxf6 1:0 The side defense of 3... fxg6 4.Qxe6+ is simply denoted as +- but this line might hold on. > > >No. 500 (f3): > >Looks wrong: 1...f3 2.Nxf3 Qg3 3.Be3 and where is the continuation ? > >Recommend: Drop it. The book continues with 3 ... Bg4 4.Qd6 Be5 0-1. Looks correct. Is there something better than Qd6 though?
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