Author: Robert Hyatt
Date: 08:16:25 01/20/98
Go up one level in this thread
On January 20, 1998 at 10:49:03, Amir Ban wrote: > >Here's a new bunch: > > >No. 153 (Qd8): > >Right, but Qd6 is equally good. > >Recommend: Add Qd6 as side solution. > > I get Qd6 instantly. at .19 seconds it fails high to 5.44 where it stays forever. a cook and too easy... >No. 162 (Rd7+): > >I find Rb8 which also wins, though Rd7+ analysis proves it's correct. > >Recommend: No change, or add Rb8 as side solution. > I get Rd7 at 19 seconds, eval = +1.13. prior to that, best move was Ra8 leading to a perpetual with the Ng8/Nf6 loop. Rb8 seems equal..., at least my score for both are very close. > >No. 180 (Bd4): > >This must be a typo. Correct is Bc4. > >Recommend: Change key to Bc4. > yes. Crafty gets Bc4, +1.9. It finds this move at .73 seconds so it fits the "easy" mold also... > >No. 186 (Nxh6): > >Nxh6 is crushing. I find Qe8 which is good for only +4. > >Recommend: Add Qe8 as side solution. > I'd toss it out. I searched Nh6 deeply too and don't see much difference in the score compared to Qe8... > >No. 187 (Nxe7): > >A hard one for me. The object of Nxe7 was not clear but after Nxe7 Nxe7 >Rb3 it turns out that it's correct, and is meant to decoy the knight so >as to trap the black queen. > >Recommend: No change. takes me 11 plies to see this. hard position, particularly with null-move very happy for the opponent after tossing the knight on e7. > > >No. 190 (Nd7): > >I can't attach any meaning to the key move. I find Ne7+ so this may be >another typo. Ne7+ Kh8 Rd8! looks correct but doesn't do more than win a >pawn. I agree. If this is the solution, it is also too easy. <.1 seconds for me to find this... > >Recommend: Change key to Ne7+. > > >No. 191 (Bd3): > >I have difficulty in finding the key move, but Bd3 Qxd3 Rg1+ is indeed >crushing. I do find Qd4 for a score of 3.5. > >Recommend: No change. Qd4 is only +2 for me after 10 plies. Crafty likes this after 4 seconds... At depth=11, Bd3 is +.5, at depth=12 it fails high to +6 > > >No. 193 (Nb6): > >Correct, but a tough one, because there's an apparent defense that >ultimately fails. The idea is 1.Nb6 Nxb6 2.Rc7 Qxc7 3.Qxe6+ wins. >Apparently black has 2...e5, which closes out the bishop and holds, but >further analysis shows that 3.Rxd7 Rxd7 4.Qe6+ Kh8 5.Nf7+ Kg7 6.Bc1 >wins. > >Recommend: No change. > > >No. 198 (Ba6): > >I find Nc5 immediately. It's easy and wins a whole rook. Don't know what >the point of Ba6 was, but looks like they overlooked the simpler and >better possibility. > >Recommend: Change key to Nc5. I get the same answer. But again, it shows up instantly (<.1 seconds) making it too obvious I think. > > >Amir
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