Rebel and Chess Tiger at the Dutch Open The road to victory
Dutch Open 2001, Leiden by Jeroen Noomen.
In the weekends 27/28 October and 3/4 November the annual Dutch Open was played in the city of Leiden. Amongst the participants were Chess Tiger 14.6 and the brand new Rebel Century 4. Both programs were counted amongst the favourites, as did Fritz by Frans Morsch and The King by Johan de Koning.
Chess Tiger defended its title, that it won last year by the very good score of 10 points in 11 games. Tiger didn't lose a single game, won 9 and drew 2. It was very nice to see Rebel back in the Dutch championship this year. It has been some time ago since Rebel participated for the last time and many people welcomed Rebel back to the national arena. And Rebel didn't disappoint its supporters!
From the beginning both Rebel and Chess Tiger took an early lead. After day 1 both programs were in first place, scoring three wins in a row. Especially Rebel showed some teeth: It beated The King and Fritz with very good play. In the fourth round Rebel had to play Tiger as white and the last one was able to win this game. After the second day, though, things were running less smoothly and after that day there were 4 leaders, all on 4,5 out of 6: Rebel, Chess Tiger, Fritz and The King.
The second weekend saw Rebel drawing Kallisto II-X and Chess Tiger beating Diep after a hardfought game. Then came the sensational game between Chess Tiger and Fritz. After a slow start Fritz sacrificed a piece for 3 pawns and added another exchange to this. In return Fritz received no less than 6 (!!) pawns for the rook deficit. But Tiger defended as a lion (sic!) and after some mistakes by Fritz it won the game by picking up all the black pawns. A sensational win, giving Tiger the sole lead.
In the 9th round Tiger looked winning against Sjeng, but a 'winning combination', netting a piece, proved to be insufficient. Rebel won against Crafty, which meant that with one day and two rounds to go, Rebel and Chess Tiger were in shared first place with 7 points. Third on 6,5 points was Fritz.
In the last 2 rounds nothing special happened, with the 3 top programs winning all their games. As a result of this, Chess Tiger 14.6 and Rebel Century 4 were both on 9 points in 11 games, Fritz having 8,5. Chess Tiger was declared winner on tiebreak. It would have been more fair to have a tiebreak decision, although people argued that Tiger deserved to win because it won against Rebel.
Needless to say I was very pleased with this result! Rebel showed some great chess, apart from the game against Tiger it was never in danger, won 8 good games and was a bit unlucky that it only drew Diep and Kallisto. Tiger had to fight in quite a few games, but showed that it is very well capable to do so. All in all Tiger also played a very good tournament and I was happy to see it play some very attractive games (against Isichess, Tao, Fritz and Crafty f.e.).
I have analysed all games played by Tiger and Rebel in this tournament. To give you an idea how these two guys are playing: Just play through the game below. I hope you'll enjoy it!
There it is, the long awaited advance. Both programs show a slightly better score for Black now. On the other hand: I was glad something happened, since Diep was running into time trouble and white gets chancesaswell
Another passive move. Tiger expected Ne6te deprives himself of the possibility a3 and b4. This contains a strong positional threat, because if White manages to throw in b4-b5, the square d5 comes free for a white knight