Junior 9
 

Junior9 by Amir Ban and Shay Bushinsky is the reigning computer chess world champion in all categories. Junior is different from all other programs in its search strategies and evaluation function. This gives the program a very distinctive style of play. The special strength of Junior is its understanding of compensation. This makes the program an extraordinarily effective tool for analysing sharp and dynamic positions, especially those involving the sacrifice of material. It is the program that is most likely to correctly understand the compensation involved, both in the execution of a sacrifice and the defence against it.

The CD contains a one-hour interview with the author of Junior, Amir Ban, who explains in clear and lucid terms the way his program works. Amir also tells us how a chess program is developed, and how Junior came about its unique playing style. His goal is to generate a new and better understanding of chess, not just a program that is more efficient at beating rival products.
 

Junior 9

Junior 9, created by Amir Ban and Shay Bushinsky, is the reigning World Computer Chess Champion in all categories. It has done so for the forth time, having already won the title in 1997, 2001 and 2002. The world championship was held at the Bar-Ilan University, Ramat-Gan, Israel, in July 2004. Here are the final results.

The chess engine Junior is different from all other programs in its search strategies and evaluation function. This gives the program a very distinctive style of play. The special strength of Junior is its understanding of compensation.


Deep Junior playing Garry Kasparov in New York 2003

The latest version is the culmination of a development that started with Junior7, the program that shocked Garry Kasparov with its famous bishop sacrifice on h2. Moves that looked purely speculative with Junior7 are proving to be perfectly sound in Junior9. This makes the program an extraordinarily effective tool for analysing sharp and dynamic positions, especially those involving the sacrifice of material. It is the program that is most likely to correctly understand the compensation involved, both in the execution of a sacrifice and the defence against it.


The famous Bxh2 sacrifice Junior played against Garry Kasparov

The latest version of Junior has improved in all parts of the game, compared to its predecessors. This can be seen in the "World Champion Test", which contains 100 test positions from games by the various (human) chess world champions. There are 38 positions for king attack, 36 for positional play and 26 positions for the endgame. Each position is tested for 20 minutes in analyse mode, without access to opening books, but with access to endgame tablebases.

WCh test
Junior 7
Junior 8
Junior 9
King attack
     
Positions solved
28
26
31
Percentage
74%
68%
82%
Rating
2659
2692
2736
Positional play
     
Positions solved
20
24
25
Percentage
56%
67%
69%
Rating
2659
2692
2700
Endgame
     
Positions solved
11
11
13
Percentage
42%
42%
50%
Rating
2624
2624
2698

The Junior 9 CD contains a one-hour interview with the author of Junior, Amir Ban, who explains in clear and lucid terms the way his program works. Amir also tells us how a chess program is developed, and how Junior came about its unique playing style. His goal is to generate a new and better understanding of chess, not just a program that is more efficient at beating rival products.

Amir Ban and Junior facing the world's number five player Veselin Topalov in Bilbao earlier this year (Junior drew the game). Amir Ban was the technical director of M-Systems, which pioneered flash memory technology used in digital cameras, phones and USB memory sticks.


Glass pieces amongst in the spectacular chess graphics included with Junior 9