Garry Kasparov vs. Deep Blue (1997)

(Lisäys 23.2)
Tämän ottelun tietokonetta vastaan Kasparov hävisi, muttei suinkaan kaikkia muita. Silti huipputietokoneitten voi sanoa nykyään voittavan kaikki shakin huippumiehet.

Tietokoneeseen verrattuna ihmisellä on kuitenkin lyömätön psykologinen kyky ja taito huijata, vaikka hän ei voikaan nähdä/laskea etukäteen jonkun pelattavan aloituksen tai strategian eri vaihtoehtoja niin pitkälle kuin miljoonat vaihtoehdot salamannopeasti hallitseva kone, joka yhä paremmin pystyy eliminoimaan myös niin sanottuihin "idiottioottimaisiin" siirtoihin sisältyvät yllätykset.

Klassisena esimerkki tällaisista yllätyksistä voi pitää siirtoa, jolla pelaaja näyttäisi ilman syytä vaarantavan koko oman peliasetelmansa ja -strategiansa.

Tällainen pelistrategia ei tietenkään sisälly vain yhteen siirtoon, vaan se on jo alunperin pelaajan kulloisenkin pelin "toimintaideaan" sisällytetty "kaksoiskoodi tai kaksoissidos", joka onnistuessaan laukeaa kuin aikapommi.
Ja mitä myöhemmässä vaiheessa näin tapahtuu, sitä väistämättömämpi on vastapelaajan tappio.

(Lisäys) "Suomeksi" sanottuna kyseessä on ANSA. Ei "sen" kummempaa...

Ylensä tällaisessa tilanteessa huippuluokan vastapelaaja luovuttaakin heti, koska hänelle selviää silmänräpäyksessä oman asemansa toivottomuus.

*
www.chessbase.com/columns/column.asp?pid=146.
(Tietokonepelin kulku videohaastatteluineen. Varsin kattava linkki.)

7. THE ROAD TO HELL (Ote em. linkistä ja sen eräästä pelianalyysista)

"On the evening after the devastating defeat we were up late studying the game. When I got to my room just after midnight I found e-mail waiting from ChessBase in Hamburg, showing me a very nice win for White in the final position. It went like this:

45...Qe3 46.Qxd6 Re8! 47.h4! Re7 48.Bf3 Qc1+ 49.Kf2 Qd2+ 50.Kg3 Qe1+ 51.Kg4 h5+ 52.Kxh5 Qg3 53.Qe6+ Rxe6 54.dxe6+ Kg8 (otherwise it's mate) 55.Ra8+ Kh7 56.Rh8+ Kxh8 57.e7 Kh7 58.e8Q and White wins. Very pretty.

While preparing for bed I left the position after 47.h4! on the screen. Suddenly I noticed that Fritz was suggesting the move 47...h5. Hmmm, that cuts of the escape route for the white king. I played around for a while and was not able to find a win for White any more. But it was two a.m. and I was too tired to check everything carefully. But it certainly looked like a draw.

The next morning I carefully extracted Yuri Dokhoyan from the work suite and took him to my room to look at the analysis. Yuri drew a sharp breath at 46...Re8 and said, "We didn't look at this move." He started checking my analysis and after some time came to the shocking conclusion: this move really draws, Garry resigned too soon! The full line from the diagram position is 45...Qe3 46.Qxd6 Re8! 47.h4! h5!! 48.Bf3 Qc1+ 49.Kf2 Qd2+ 50.Be2 Qf4+ 51.Kg1 Qe3+ 52.Kf1 Qc1+. White cannot escape the checks, the pawn on h5 prevents the king from escaping.

* Game 2: Deep Blue - Kasparov,G.

Now came the tough part: how to tell Garry. Walking with him to an Italian restaurant for breakfast Yuri and I debated whether we should wait until after lunch or ruin the meal for him. We decided to go ahead and Yuri broke the news gently. Garry clutched his head and froze in the middle of the Fifth Avenue. There were no expletives, no cursing, just stunned silence. We walked on to the restaurant and there, after many minutes of gloom, he looked up at me and said "Re8, h4, h5 that was all? I was so impressed by the deep positional play of the computer that I didn't think there was any escape."

Later I was interviewed by Bobby Batista on CNN about this amazing missed draw. Just outside the studio a charming lady warned me about my prospects of going to hell. In some ways it seemed symbolic to enter a modern virtual reality arcade right across the street from her...

Video: Interview in CNN, preacher on the street, game arcade"

***

(Wikipedian miniminitiivistelmä samasta pelistä)

"In May 1997, an updated version of Deep Blue defeated Kasparov in Deep Blue - Kasparov, 1997, Game 6, in a highly publicised six-game match. This was the first time a computer had ever defeated a world champion in match play. An award-winning documentary film was made about this famous matchup entitled Game Over: Kasparov and the Machine.

Also, IBM keeps a web site of the event at http://www.research.ibm.com/deepblue/. It should be noted that several factors weighed against Kasparov in this match. He was denied access to Deep Blue's recent games, in contrast to the computer's team that could study hundreds of Kasparov's. The relatively fast time control, lack of rest days and other match rules also favored the machine."

Garry Kasparov (Wikipedian tiedot)

Shakkiblogi (Uusi linkki, joka on ymmärtääkseni eräänlaisessa "koekäytössä". Kattaa kaiken perustiedosta ja säännöistä alkaen.)