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Subject: Re: Crafty 17.7 @ 200M nps results

Author: Uri Blass

Date: 16:09:21 04/13/02

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On April 13, 2002 at 19:01:06, Slater Wold wrote:

>On April 13, 2002 at 16:24:05, Uri Blass wrote:
>
>>On April 13, 2002 at 15:36:27, Slater Wold wrote:
>>
>>>On April 13, 2002 at 02:08:18, Slater Wold wrote:
>>>
>>>>[D]r2qk2r/pp3ppp/2p1pn2/4n3/1b6/3P2PP/PPPN1PB1/R1BQK2R b KQkq - 0 11
>>>>
>>>>In this position Deeper Blue found h5 in 121 seconds.  After Murray moved,
>>>>Kasparov looked at him in disarray.  After the match, Kasparov said "Sometimes
>>>>the computer plays very human moves."
>>>>
>>>>The power supply to my new machine has not arrived yet, so I can only test this
>>>>move using Fritz 7.  It found h5 in 11:47 and played it through the 15th ply and
>>>>over 20 minutes.  (On an AMD 1200mhz.)  This move (h5) has been confirmed by
>>>>several masters to be the "best" move.  Can anyone get it faster?
>>>>
>>>>This is move 11 from game 5 of the 1997 match.
>>>
>>>
>>>              clearing hash tables
>>>              time surplus   0.00  time limit 855:00 (855:00)
>>>         nss  depth   time  score   variation (1)
>>>                5->   0.00  -0.12   1. ... O-O 2. O-O Nd5 3. c4 Nb6
>>>                6     0.00  -0.27   1. ... O-O 2. O-O Bxd2 3. Bxd2 Qd4
>>>                                    4. b4 Rad8
>>>                6     0.00  -0.25   1. ... Qd6 2. f4 Ng6 3. c3 Bc5 4. Qe2
>>>                6->   0.00  -0.25   1. ... Qd6 2. f4 Ng6 3. c3 Bc5 4. Qe2
>>>                7     0.00  -0.19   1. ... Qd6 2. a3 Bc5 3. f4 Qd4 4. Ne4
>>>                                    Ned7 5. Nxc5 Nxc5
>>>                7->   0.00  -0.19   1. ... Qd6 2. a3 Bc5 3. f4 Qd4 4. Ne4
>>>                                    Ned7 5. Nxc5 Nxc5
>>>                8     0.00  -0.37   1. ... Qd6 2. O-O O-O-O 3. d4 Ng6 4.
>>>                                    c3 Ba5 5. b4
>>>                8     0.01  -0.35   1. ... Qc7 2. a3 Bd6 3. O-O O-O-O 4.
>>>                                    d4 Ng6 5. Qe2
>>>                8->   0.03  -0.35   1. ... Qc7 2. a3 Bd6 3. O-O O-O-O 4.
>>>                                    d4 Ng6 5. Qe2
>>>                9     0.03  -0.19   1. ... Qc7 2. O-O O-O-O 3. Qe2 Kb8
>>>                                    4. Re1 Bd6 5. a4 Nd5
>>>                9->   0.06  -0.19   1. ... Qc7 2. O-O O-O-O 3. Qe2 Kb8
>>>                                    4. Re1 Bd6 5. a4 Nd5
>>>               10     0.06  -0.28   1. ... Qc7 2. O-O O-O-O 3. a3 Bd6 4.
>>>                                    Qe2 Kb8 5. d4 Ng6 6. Qc4
>>>               10->   0.17  -0.28   1. ... Qc7 2. O-O O-O-O 3. a3 Bd6 4.
>>>                                    Qe2 Kb8 5. d4 Ng6 6. Qc4
>>>               11     0.21  -0.26   1. ... Qc7 2. O-O O-O-O 3. d4 Ng6 4.
>>>                                    a4 Kb8 5. Nc4 Rd7 6. Bg5 Rhd8
>>>               11->   0.41  -0.26   1. ... Qc7 2. O-O O-O-O 3. d4 Ng6 4.
>>>                                    a4 Kb8 5. Nc4 Rd7 6. Bg5 Rhd8
>>>               12     0.69  -0.26   1. ... Qc7 2. O-O h5 3. Ne4 O-O-O 4.
>>>                                    Qe2 Kb8 5. a4 h4 6. Nxf6 gxf6 <HT>
>>>               12->   1.38  -0.26   1. ... Qc7 2. O-O h5 3. Ne4 O-O-O 4.
>>>                                    Qe2 Kb8 5. a4 h4 6. Nxf6 gxf6 <HT>
>>>               13     3.19  -0.26   1. ... Qc7 2. Qe2 h5 3. d4 Bxd2+ 4.
>>>                                    Bxd2 Ng6 5. O-O-O O-O-O 6. c3 Kb8 7.
>>>                                    Kb1 h4 8. Qd3 <HT>
>>>               13->   5.34  -0.26   1. ... Qc7 2. Qe2 h5 3. d4 Bxd2+ 4.
>>>                                    Bxd2 Ng6 5. O-O-O O-O-O 6. c3 Kb8 7.
>>>                                    Kb1 h4 8. Qd3 <HT>
>>>               14     9.01  -0.20   1. ... Qc7 2. a3 Bd6 3. Nb3 h5 4. Be3
>>>                                    h4 5. gxh4 Ng6 6. h5 Nf4 7. Qf3 O-O-O
>>>                                    8. Bxa7 Nxg2+ 9. Qxg2 Nxh5
>>>               14    18.38  -0.18   1. ... h5 2. Qe2 Qc7 3. a3 Bd6 4. Ne4
>>>                                    Nxe4 5. Qxe4 O-O-O 6. b4 f5 <HT>
>>>               14->  19.48  -0.18   1. ... h5 2. Qe2 Qc7 3. a3 Bd6 4. Ne4
>>>                                    Nxe4 5. Qxe4 O-O-O 6. b4 f5 <HT>
>>>               15    26.03  -0.19   1. ... h5 2. Qe2 Qc7 3. a3 Bd6 4. Ne4
>>>                                    Nxe4 5. Qxe4 Ng6 6. Qe3 h4 7. Be4 f5
>>>                                    8. Bf3 hxg3 9. Qxe6+ Qe7
>>>               15->  49.01  -0.19   1. ... h5 2. Qe2 Qc7 3. a3 Bd6 4. Ne4
>>>                                    Nxe4 5. Qxe4 Ng6 6. Qe3 h4 7. Be4 f5
>>>                                    8. Bf3 hxg3 9. Qxe6+ Qe7
>>>               16     1:44  -0.13   1. ... h5 2. Qe2 Qc7 3. a3 Be7 4. Ne4
>>>                                    O-O-O 5. Be3 Nd5 6. Bxa7 b6 7. f4 Nd7
>>>                                    8. Bxb6 Qxb6 9. c3
>>>               16->   3:01  -0.13   1. ... h5 2. Qe2 Qc7 3. a3 Be7 4. Ne4
>>>                                    O-O-O 5. Be3 Nd5 6. Bxa7 b6 7. f4 Nd7
>>>                                    8. Bxb6 Qxb6 9. c3
>>>               17     3:14   1/48   1. ... h5
>>>
>>>
>>>Crafty 17.7 @ 700k nps found it in 85:25.
>>
>>The question is if Qc7 is worse than h5.
>>
>>Crafty had h5 in the main line when it wanted to play Qc7 and
>>the difference at depth 14 is only 0.02 pawns.
>>
>>Uri
>
>As I said, several masters, including Kasparov himself said h5 was the better
>move here.  I am going by what they said.  I don't think I am in a position to
>disagree with them.

h5 is better than castling and I suspect that they compared between h5 and
castling that is a typical computer move.

I need an explanation why Qc7 with the plan to play h5 later is inferior
relative to h5.

Uri



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