Author: Robert Hyatt
Date: 08:32:35 01/17/05
Go up one level in this thread
On January 16, 2005 at 15:33:38, chandler yergin wrote:
>On January 16, 2005 at 13:10:08, Dieter Buerssner wrote:
>
>>On January 16, 2005 at 07:55:49, Yar wrote:
>>
>>>How long does it take for your engine to find kf3 ?
>
>DOES IT MATTER?
>The King has 6 "Possible" Moves....
>
>Use Multiple Lines... USE the TOOLS!
>Create 6 pV's in Parallel SIMULTANEOUSLY!
Yes, and it takes 6x longer to compute those 6 pvs, which means the program
searches about 1.5-2.0 plies _shallower_ than it would normally search showing
only one PV.
What exactly would this prove, therefore???
You don't quite understand alpha/beta search yet, obviously...
>
>Each Move generates a Line..
>SEE how the Computer Evaluates ALL of them! At the SAME TIME!
>New game,
>[D]8/7R/1N2k1p1/P1p1b3/P3r3/7P/4K3/8 w - - 0 1
>
>Analysis by Shredder 8:
>
>1. +- (2.78): 1.Kf3 Rb4 2.Rb7
>2. +- (1.92): 1.Kd1 Rd4+ 2.Kc1 Rb4 3.Rb7 Kd6 4.Rb8 Kc6 5.Rc8+
>3. +- (1.78): 1.Kd2 Rb4 2.Kd3 Rd4+ 3.Kc2 Rb4 4.Kc1 Bf4+ 5.Kc2 Be5 6.Kc1 Bf4+
>7.Kc2 Be5 8.Kc1
>4. +- (1.73): 1.Kd3 Rd4+ 2.Kc2 Rb4 3.Kc1 Bf4+ 4.Kc2 Be5 5.Kc1 Bf4+ 6.Kc2 Be5
>7.Kc1
>5. = (0.03): 1.Kf1 c4 2.Rd7 c3 3.Rd8 Bd4 4.Re8+ Kf5
>6. µ (-0.74): 1.Kf2 c4 2.a6 Bd4+ 3.Kg2 Re2+ 4.Kf1 Rf2+ 5.Ke1 Bxb6 6.Rb7 Bc5 7.a7
>c3 8.a8Q Rf8 9.Qxf8 c2 10.Qxc5
>
>(, 16.01.2005)
>
>
>THIS, is the ‘absurdity' that I have with Programmers.
It is "absurdity" of course, but _not_ with the programmers...
>
>You ‘wait'for 3 Hours?
>
>WHY?
>
>Of Course the Program finds 1. Kf3 Evaluates it as Best...
>So.. THEN Focus on the one Line!
>It Will Scroll that pV, and you haven't 'lost' any information.
>
>Indeed, you have gained information.
>
>
>
>>>8/7R/1N2k1p1/P1p1b3/P3r3/7P/4K3/8 w - - 0 47
>
>
>
>
>>
>>Yace almost immediately, loses it after some seconds. Finds it again after 3
>>hours (when I lost patience). Is Kf3 the only winning move?
>
>
>If you'd have used Multiple Lines, you'd Know; and could use those 3 Hours
>a bit more productively!
Totally wrong conceptually. The point is that the engine sees the right move
quickly, but then doesn't understand why it is right so that the move was just
lucky to be first. After a _long_ search the program discovers the tactical
reason that makes the move really best...
No program will understand this type of move at a shallow search unless it has
specific chess knowledge. In that case it would not need to search that deeply
to see the idea behind the move.
This entire discussion is so ridiculous that any student participating in it
should be given a grade of "F" for not understanding basic concepts yet arguing
with those that do...
>
>
>>
>>Regards,
>>Dieter
>>
>> 107976929 2:02.5 1.12 14. 47.Kd1 Rb4 48.Rb7 Rd4+ 49.Ke2 Re4+ 50.Kf3 Rf4+
>> 51.Kg2 c4 52.a6 c3 53.a7 c2 54.a8=Q c1=Q
>> 55.Qe8+ Kf5 56.Rf7+ Bf6 57.Rxf6+ Kxf6 58.Nd5+
>> Kf5 {-80}
>> 196012611 3:43.2 1.15 15t 47.Kd1 Rb4 48.Rb7 Kd6 49.Nc8+ Kc6 50.Rxb4 cxb4
>> 51.Ne7+ Kb7H 52.Nxg6H Bc3H 53.Kc2H Ka6H 54.h4H
>> Bd2H {HT} {150}
>> 250601620 4:50.1 1.15 15. 47.Kd1 Rb4 48.Rb7 Kd6 49.Nc8+ Kc6 50.Rxb4 cxb4
>> 51.Ne7+ Kb7 52.Nxg6 Bc3 53.Kc2 Ka6 54.h4 Bd2
>> {HT} {150}
>> 466173985 9:02.1 1.20 16t 47.Kd1 Rb4 48.Rb7 Rd4+ 49.Kc1 Kd6 50.Rb8 Kc6
>> 51.Rc8+ Bc7 52.Na8 Rc4+ 53.Kd2 Kb7 54.Rxc7+
>> Kxa8 55.Rc6 Rd4+ 56.Kc3 Rh4 {HT} {80}
>> 653549812 12:56.4 1.20 16. 47.Kd1 Rb4 48.Rb7 Rd4+ 49.Kc1 Kd6 50.Rb8 Kc6
>> 51.Rc8+ Bc7 52.Na8 Rc4+ 53.Kd2 Kb7 54.Rxc7+
>> Kxa8 55.Rc6 Rd4+ 56.Kc3 Rh4 {HT} {80}
>>1088869997 20:39.7 1.60 17++ 47.Kd1 Rb4 48.Rb7 Rd4+ 49.Kc2 c4 50.a6 c3
>> 51.Rd7 Rxd7 52.Nxd7 Bd4 53.Nf8+ Kf7 54.Nh7 Bb6
>> 55.Kxc3 Kg8 56.a7 Bxa7 57.Ng5 {HT} {70}
>>1623915033 30:01.4 1.62 17t 47.Kd1 Rd4+ 48.Kc1 Rb4 49.Rb7 Kd6 50.Rb8 Ke6
>> 51.Re8+ Kf5 52.a6 Rxb6 53.a7 Ra6 54.a8=Q Rxa8
>> 55.Rxa8 c4 56.Rc8 Bf4+ 57.Kc2 {HT} {150}
>>1953247137 36:32.4 1.62 17. 47.Kd1 Rd4+ 48.Kc1 Rb4 49.Rb7 Kd6 50.Rb8 Ke6
>> 51.Re8+ Kf5 52.a6 Rxb6 53.a7 Ra6 54.a8=Q Rxa8
>> 55.Rxa8 c4 56.Rc8 Bf4+ 57.Kc2 {HT} {150}
>>2878266080 53:20.6 1.65 18t 47.Kd1 Rd4+ 48.Kc1 Rb4 49.Rb7 Kd6 50.Rb8 Ke6
>> 51.Re8+ Kf5 52.a6 Rxb6 53.a7 Ra6 54.a8=Q Rxa8
>> 55.Rxa8 c4 56.Re8 Ke4 57.Kd2 c3+ {HT} {150}
>>3788563414 1:12:24 1.65 18. 47.Kd1 Rd4+ 48.Kc1 Rb4 49.Rb7 Kd6 50.Rb8 Ke6
>> 51.Re8+ Kf5 52.a6 Rxb6 53.a7 Ra6 54.a8=Q Rxa8
>> 55.Rxa8 c4 56.Re8 Ke4 57.Kd2 c3+ {HT} {150}
>>2054909735 2:05:09 1.59 19t 47.Kd1 Rd4+ 48.Kc1 Rb4 49.Rb7 Kd6 50.Rb8 Kc6
>> 51.Rc8+ Kb7 52.Rxc5 Bh2 53.Rc4 Rb3 54.Rh4 Ka6
>> 55.Kc2 Rf3 56.Nc4 Rf2+ 57.Kd3 Bf4 {HT} {150}
>> 568389920 3:04:14 1.60 19t+ 47.Kf3 Rf4+ 48.Kg2 Rb4 49.Rb7 Rb2+ 50.Kf3 Rb3+
>> 51.Ke2 Bf6 52.a6 Rg3
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