Author: Slater Wold
Date: 19:18:28 09/18/01
Go up one level in this thread
On September 18, 2001 at 21:08:03, K. Burcham wrote:
>deep blue vs kasparov
>game 1
>
>here is the conversation with kasparov and his team trying to figure out why
>deep blue played the "blunder" Rd1. here they find out it was not a blunder.
>deep blue first had to solve Rf5. then it had to solve Rg8.
>after deep blue solved both of these moves as a mate, then it chose Rd1.
>todays programs will indicate this as a blunder, because they cannot see that
> Rg8 or Rf5 or Kh5 or e3 fail lower than 44...Rd1.
>yes the game was over for deep blue in this position.
>the point here is deep blue did choose 44...Rd1.
>kasparov was convinced that Rd1 was a blunder until his study with his
> computer that night in the hotel.
>
>also based on this info in the deep blue log,
> --> 44. ... Rd1 <-- 16/72:55,
>does this mean depth is 16/72? and deep blue only took 55 seconds to move
> in this position?
>
>
>after 44...Rd1, kasparov plays 45.g7 then deep blue resigned.
>
>
>That night in the hotel we crowded around the Fritz screen and went through the
>game. Garry entered and checked a number of variations. In the position before
>the final move by Deep Blue he had a problem.
>
>The game continued 44...Rd1 45.g7 and Black resigned. Sitting in front of the
>computer Garry started trying out other lines, beginning with 44...Rf5+. Then he
>turned to me (his "computer expert") and said: "How could Deep Blue play
>44...Rd1 and lose immediately? 44...Rf5+ also loses, but it puts up much more
>resistance. How can a computer commit suicide like that?" I had no immediate
>answer, it did indeed look very strange. Garry continued to potter around with
>Fritz, and suddenly he found the solution himself. After 44...Rf5+ White has
>45.Ke3! with beautiful forced wins: 47...Rd8 48.g7 Rxc2+ 49.Ke1 Rc1+ 50.Kf2 Rc2+
>51.Kg3 Rc3+ (somewhere around here Fritz started to announce mates) 52.Kh4 Rc1
>(after 52...Rd1 we have 53.g8N+! and mate) 53.g8Q Rh1+ 54.Kg3 Rg1+ 55.Kf4 Rf1+
>56.Ke5 Rd5+ 57.Ke6, and if you really want to go on, it's 57...Rf6+ 58.Kxf6 Rd6+
>59.Ke7 Rd7+ 60.Kxd7 c5 61.Qg6 mate. Another line we checked with Fritz was
>50...e3+ 51.Kg2 e2 (51...Rc2+ 52.Kh3 is mate in 8) 52.g8Q Rxg8 53.fxg8Q Rg1+
>54.Kf3 Rxg4 55.Qh8+ Kg6 56.Qe8+ Kf5 57.Qf7+ Ke5 58.Kxg4, which had the whole
>team laughing.
>
>
>
> [D] 4r3/8/2p2PPk/1p1r4/pP2p1R1/P1B5/2P2K2/8 b - -
>
>kburcham
I believe it's harder to find "less incorrect" moves, than it is to find
"correct" moves. None the less, I gave Crafty an hour on this, and this is what
it had to say:
White(1): st 3600
search time set to 3600.00.
White(1): epdpfga test.epd test.out
PFGA: EPD record: 1 ID: test.1
end-game phase
clearing hash tables
time surplus 0.00 time limit 60:00 (60:00)
nss depth time score variation (1)
starting thread 1
6 0.11 3.04 1. ... Rf5+ 2. Ke2 Kh5 3. f7 Ra8 4.
g7 Rxf7 5. g8=Q Rxg8 6. Rxg8
6 0.14 ++ 1. ... e3+!!
(3) 6-> 0.31 2.65 1. ... e3+8
7 0.37 -- 1. ... e3+
(2) 7 0.51 3.69 1. ... e3+ 2. Ke2 Rh5 3. g7 Rh2+ 4.
Kd3 Rd8+ 5. Rd4 Rc8 6. Kxe3 Rxc2
7 0.51 ++ 1. ... Rf5+!!
7 0.76 2.13 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Rf3 4.
Bd2+ Kh7 5. Rh4+ Kg6 6. Rh8 Kf7 7.
Rxg8 Kxg8
(2) 7-> 0.90 2.13 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Rf3 4.
Bd2+ Kh7 5. Rh4+ Kg6 6. Rh8 Kf7 7.
Rxg8 Kxg8
8 0.98 -- 1. ... Rf5+
8 1.18 3.86 1. ... Rf5+ 2. Ke2 Rg8 3. g7 e3 4.
Rh4+ Kg6 5. Rh8 Kf7 6. Rxg8 Kxg8 7.
Kxe3
8 1.93 ++ 1. ... Kh5!!
8 2.25 3.20 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bg7 Rg8 5. fxg8=Q Rxg8 6. Bf6 Rxg6
(3) 8-> 2.56 3.20 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bg7 Rg8 5. fxg8=Q Rxg8 6. Bf6 Rxg6
(2) 9 2.73 3.23 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bf6 Rd7 5. g7 Rdxf7 6. Rg5+ Kh6 7.
gxf8=Q+ Rxf8 8. Rf5
(4) 9-> 3.93 3.23 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bf6 Rd7 5. g7 Rdxf7 6. Rg5+ Kh6 7.
gxf8=Q+ Rxf8 8. Rf5
(3) 10 4.25 3.23 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bf6 Rd7 5. g7 Rdxf7 6. gxf8=Q Rxf8
7. Rf4
(3) 10-> 6.03 3.23 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bf6 Rd7 5. g7 Rdxf7 6. gxf8=Q Rxf8
7. Rf4
(2) 11 6.89 3.54 1. ... Kh5 2. f7 Rf8 3. Kg3 Rdd8 4.
Bf6 Rd7 5. Kf4 Rdxf7 6. gxf7 Rxf7 7.
Rg5+ Kh6 8. Ke5
11 10.76 3.22 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Kd3 Rgc8 8. Be5 Rxc2
11-> 13.01 3.22 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Kd3 Rgc8 8. Be5 Rxc2
12 14.59 3.28 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Bd4 Rxc2+ 8. Kd3 Rc4 9. Ke4
(2) 12-> 20.72 3.28 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Bd4 Rxc2+ 8. Kd3 Rc4 9. Ke4
13 25.33 3.31 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Kd3 Rd8+ 8. Bd4 Rcd5 9. c3 Kf7
(2) 13-> 37.72 3.31 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rxe4 Kg6 5. Re6 c5 6. bxc5 Rxc5 7.
Kd3 Rd8+ 8. Bd4 Rcd5 9. c3 Kf7
14 48.23 -- 1. ... Rf5+
14 59.20 3.74 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rg2 Rf3 5. Rf2 Rxc3 6. f7 Rxc2+ 7.
Ke3 Rxg7 8. f8=Q Rxf2 9. Qxg7 Rf3+
10. Kxe4 Rxa3
(2) 14-> 1:33 3.74 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rg2 Rf3 5. Rf2 Rxc3 6. f7 Rxc2+ 7.
Ke3 Rxg7 8. f8=Q Rxf2 9. Qxg7 Rf3+
10. Kxe4 Rxa3
15 2:25 4.06 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rg2 Rf3 5. Rf2 Rxf2+ 6. Kxf2 Kg6 7.
Ke3 Re8 8. Be5 Rxe5 9. g8=Q+ Kxf6 10.
Qh8+ Kf5 11. Qh3+ Kg5 12. Qh8
(3) 15-> 4:44 4.06 1. ... Rf5+ 2. Ke2 Rg8 3. g7 Kh5 4.
Rg2 Rf3 5. Rf2 Rxf2+ 6. Kxf2 Kg6 7.
Ke3 Re8 8. Be5 Rxe5 9. g8=Q+ Kxf6 10.
Qh8+ Kf5 11. Qh3+ Kg5 12. Qh8
16 8:39 -- 1. ... Rf5+
(2) 16 16:31 4.82 1. ... Rf5+ 2. Ke3 Rf3+ 3. Ke2 Rf5
4. f7 Rd8 5. Rxe4 Kxg6 6. Re8 Kxf7
7. Rxd8 Ke6 8. Rd1 Rg5 9. Bd4 Rg3 10.
Be3 Rg4
16 20:26 ++ 1. ... Rg8!!
16 26:05 4.09 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh7 4.
Bd4 e3 5. Kxe3 Rf1 6. Kd3 Kh6 <HT>
(2) 16-> 27:56 4.09 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh7 4.
Bd4 e3 5. Kxe3 Rf1 6. Kd3 Kh6 <HT>
17 31:08 4.23 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh7 4.
Bd4 e3 5. Kxe3 Rf1 6. Kd3 Kh6 7. Ke4
Kh5 8. Rf4 Rxf4+ 9. Kxf4 Kg6 10. Be5
Kf7 11. Ke4 c5
(2) 17-> 39:00 4.23 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh7 4.
Bd4 e3 5. Kxe3 Rf1 6. Kd3 Kh6 7. Ke4
Kh5 8. Rf4 Rxf4+ 9. Kxf4 Kg6 10. Be5
Kf7 11. Ke4 c5
18 44:10 4.09 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh5 4.
Rg2 Rf3 5. Rf2 Rxf2+ 6. Kxf2 Kg6 7.
Ke3 Kf7 8. Kxe4 Re8+ 9. Be5 Rg8 10.
Kf4 Rd8 11. c3 Rd2 12. Ke4 <HT>
(3) 18-> 59:35 4.09 1. ... Rg8 2. g7 Rf5+ 3. Ke2 Kh5 4.
Rg2 Rf3 5. Rf2 Rxf2+ 6. Kxf2 Kg6 7.
Ke3 Kf7 8. Kxe4 Re8+ 9. Be5 Rg8 10.
Kf4 Rd8 11. c3 Rd2 12. Ke4 <HT>
time=60:00 cpu=200% mat=-1 n=1156780585 fh=1% nps=321k
ext-> chk=351035928 cap=12720303 pp=29236344 1rep=15684725 mate=99
8921
predicted=0 nodes=1156780585 evals=1305684972
endgame tablebase-> probes done=507 successful=507
hashing-> trans/ref=0% pawn=0% used=99%
SMP-> split=8444 stop=1338 data=11/32 cpu=120:12 elap=60:00
Black(1):
I will give Deep Fritz, Deep Junior, and Deep Shredder 1 hour on this. Just for
good measure.
Slate
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