Author: Ed Schröder
Date: 03:06:48 12/25/99
Go up one level in this thread
On December 25, 1999 at 03:34:11, blass uri wrote: >On December 24, 1999 at 20:00:48, Vincent Diepeveen wrote: > >>On December 24, 1999 at 18:39:00, blass uri wrote: >> >>>On December 24, 1999 at 17:17:01, Vincent Diepeveen wrote: >>> >>>>00:25 391314 (0) 8 -0.48 c2-c4 Qd8-h4 g2-g3 f4xg3 f2xg3 Rg6xg3 Nd5-f6 Ke8-e7 Qd1 >>>>-e1 Rg3-h3 >> >>>This line shows that it does not see it for the right reasons. >> >>remember, the lines are from hashtable and it's a fail low, >>obviously fail low doesn't show the correct line. >> >>>After c4 Qh4 g3 the right move for black is Qh3 and not f4xg3 >>> >>>The line f4xg3 f2xg3 Rg6xg3 is not clearly winning for black and I guess that >>>deep thought expected this line when it played c4. >> >>>White can continue Qe1 Rh3 Qxh4 Rxh4 cxb5 and the question if g3 is better is a >>>positional question and not a tactical question. >>> >>>The evaluation of programs after f4xg3 are less than 1 pawn for black. >> >>>c4 is a tactical blunder not because of this line but because of the line with >>>Qh3 >> >>Right. It just already sees something that's evil enough. Very likely >>not this line, but something that has to do with Qh3. We're just needing >>a bound that's it. Then we get a fail low. > >I tried Genius3 with selective depth 0 after c4 Qh3 g3 Qh3 Rg1 and it needs 8 >plies to see that Qxh2 is winning. > >so I guess that it needs 13 plies with no extensions before c4 to see that c4 is >a tactical mistake. > >I see lines of 2 plies when I tell genius3 1 ply with no extension so 13 >plies+no extensions is practically 14 plies. > >My point is that you need to see 14 plies to reject c4 for the reason of Qxh3 >and not for a positional reason. > >If Deep thought had some rules not to extend wasting tempo lines that are also >giving the queen for a pawn that it may explain the tactical mistake. > >Uri c4 is a giant tactical blunder. RC only needs 8 plies. Score -1.xx That's the big contradiction between c5! (+2.xx) and c4?? Ed
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