Author: Bruce Moreland
Date: 10:00:13 02/04/98
Go up one level in this thread
On February 04, 1998 at 06:01:52, Amir Ban wrote: >On February 04, 1998 at 03:12:35, Howard Exner wrote: > >>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. >>> > >Perhaps so. Qxd6 ends up an exchange and a pawn up with the queens >traded. gxh7 is two pawns up, pawn on seventh and black king stripped. >Rebel is conservative. Mine takes Qxd6, but I don't want to get involved in arguments about positional chess. >>> >>>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? >>> > >2... f5 looks better, though white is happier in this position. The >a-pawn gives black counterplay. I get 1. f4 in a couple of minutes, at +0.97, going up to +1.37 after 42 minutes. My line is just a strong attack. I'm worried that interesting positions like this may be cut even if they turn out to be sound, just because we can't figure out how to win them. >>>No. 425 (Ng4+): >>> >>>The Ng4+ idea works, but I prefer the intermediate Bf5 Qg2 Ng4+. >>> >>>Recommend: Add Bf5. >> >>Agree This is a transposition a tempo later, right? >>>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. I get Rxg4 with a nice jump here, but I didn't run it longer than 20 seconds. Howard may very well be right though. At the least it's cooked. >>>No. 434 (Ncxd6): >>> >>>This is fairly difficult. Nbxd6 is a transposition. >>> >>>Recommend: Add Nbxd6. >> >>Agree They are both +4, so it's either cooked or transposed or both. >>>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. I don't find this in an hour on a P2/300. >>>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. Easy problem, yes. >>>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. Not found in 4 hours on an alpha. >>>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. Maybe, but in my line white wins back the d5 pawn, and black is still pretty cut up. I only ran it for an hour though, and got +1.23. >>>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 >> > >Right, and if 4.Bd4 Bb4. So it's correct. >>>4.Bd4 and if the >>>c-pawn falls, what is black's threat ? If now 4...Bc5 5.Qg3. >>> >>>Recommend: Investigate. +1.23 in 22 seconds, +1.87 in 33 minutes. >>>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. >> > >Right. Keep it. > > >>>If it's correct, it should be extremely difficult. >> >>Yes this will be a tough one. >>> >>>Recommend: Investigate. I ran this for four hours on the Alpha. After 34 minutes it had a draw score. Next iteration took a huge amount of time to resolve, it ended up terminating in a fail-high condition, failing high from the draw score, so the score is still pretty low. >>>No. 482 (Bxb5+): >>> >>>I get h4. Different plan, similar result (+115). >>> >>>Recommend: Add h4. >> >>Bxb5+ seems more forceful. >>> > >I don't know. I get 1. h4 for a while and then switch to 1. Bxb5 at 90 seconds at about +1.2. >>>No. 488 (Bh3): >>> >>>I think it's wrong: Bh3 Ne1 and black is worse than ever. >>> >>>Recommend: Drop it. I get Bh3 at +0.20 after three and a half minutes, +1.64 after 45 minutes. The line I get is 1. ... g3, so I don't know what happens after 1. ... Ne1. >>>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 Not found in 4 hours on the alpha. >>>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. >>> > >You mean 4.Qe6+. Seems so. Drop it. I'm running this now. >>>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? > >No. Rd2 and Qc5 fail. It's correct. I'm running this now, too. bruce
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