Piece Cooperation and Penalties

[mjlef]

I am going back to an old scheme in NOW using a big lookup table for piece cooperation and penalty values. This tabel will be inxed on materail and let me give these penalties and bonuses practically for free. You just add or subtract to the table on program startup based on whatever rules you want. Nopw the issue becomes what to put in this table. SOme classic things:

bishop pair bonus
Q&N bonus versus Q&B
NN penalty
RR penalty?
NN versus BB penalty
classic penalties for Lone Bishop, Lone Knight, 2 Knights..
peanlties and bonuses for rooks and knights based on remaining pawns
What else would be good to add?

Mark

[Ferdinand]

I am going back to an old scheme in NOW using a big lookup table for piece cooperation and penalty values. This tabel will be inxed on materail and let me give these penalties and bonuses practically for free. You just add or subtract to the table on program startup based on whatever rules you want. Nopw the issue becomes what to put in this table. SOme classic things:

bishop pair bonus
Q&N bonus versus Q&B
NN penalty
RR penalty?
NN versus BB penalty
classic penalties for Lone Bishop, Lone Knight, 2 Knights..
peanlties and bonuses for rooks and knights based on remaining pawns
What else would be good to add?

Mark

Hi Mark,

Maybe also interesting is pieces/pawns cooperation, to defeat a position ahead in material.
1. kpp vs kr, material is better for black but kpp can win depending
on pawn positions and king positions
2. kbp vs kr
3. In endings, King cooperation to pieces/pawns is very important.

BTW what is NN and RR penalty?

Regards,
Ferdinand

[mjlef]

I am going back to an old scheme in NOW using a big lookup table for piece cooperation and penalty values. This tabel will be inxed on materail and let me give these penalties and bonuses practically for free. You just add or subtract to the table on program startup based on whatever rules you want. Nopw the issue becomes what to put in this table. SOme classic things:

bishop pair bonus
Q&N bonus versus Q&B
NN penalty
RR penalty?
NN versus BB penalty
classic penalties for Lone Bishop, Lone Knight, 2 Knights..
peanlties and bonuses for rooks and knights based on remaining pawns
What else would be good to add?

Mark

Hi Mark,

Maybe also interesting is pieces/pawns cooperation, to defeat a position ahead in material.
1. kpp vs kr, material is better for black but kpp can win depending
on pawn positions and king positions
2. kbp vs kr
3. In endings, King cooperation to pieces/pawns is very important.

BTW what is NN and RR penalty?

Regards,
Ferdinand

Yeah, the king cooperation term has to be dynamic since it all depends upon placement of the pieces. The NN and RR renalties were a suggetsion by Don Dailey from Larry Kaufman. Both relate to having 2 of the same pieces, so they tend to be able to cover the same things. For example, BN should be better than NN. So small NN penalty shoul discourage exchanges leading to NN.

Of course, I am a horrible player so what d I know!

Mark

[Ferdinand]

I am going back to an old scheme in NOW using a big lookup table for piece cooperation and penalty values. This tabel will be inxed on materail and let me give these penalties and bonuses practically for free. You just add or subtract to the table on program startup based on whatever rules you want. Nopw the issue becomes what to put in this table. SOme classic things:

bishop pair bonus
Q&N bonus versus Q&B
NN penalty
RR penalty?
NN versus BB penalty
classic penalties for Lone Bishop, Lone Knight, 2 Knights..
peanlties and bonuses for rooks and knights based on remaining pawns
What else would be good to add?

Mark

Hi Mark,

Maybe also interesting is pieces/pawns cooperation, to defeat a position ahead in material.
1. kpp vs kr, material is better for black but kpp can win depending
on pawn positions and king positions
2. kbp vs kr
3. In endings, King cooperation to pieces/pawns is very important.

BTW what is NN and RR penalty?

Regards,
Ferdinand

Yeah, the king cooperation term has to be dynamic since it all depends upon placement of the pieces. The NN and RR renalties were a suggetsion by Don Dailey from Larry Kaufman. Both relate to having 2 of the same pieces, so they tend to be able to cover the same things. For example, BN should be better than NN. So small NN penalty shoul discourage exchanges leading to NN.

Of course, I am a horrible player so what d I know!

Mark

Hello Mark,

I have not yet tried this BN vs NN, I think I have to try this out, this will be applied when both sides have passed pawns trying to promote, and that both kings are helpless to block opp passers, and it will rely only on pieces' activities. From these piece activities the king position will gradually be able to block opp passers. BN might be favorable here because distance of passer is not a problem to bishops.

For the RR, I think this is good and does not need to be penalized. These 2 rooks are very capable of mating opponent king almost anywhere on the board, also one rook (after an exchange of 1 rook) is capable of paralizing opponent king (rook at 7th/2nd rank when opp king is at 8th/1st rank or a rook at file b/g when opp king is at file a/h.

Only some wild imagination

Ferdinand