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Carl Langan

Joined: 02 Jun 2012
Posts: 1471

Post subject: Re: Komodo 10.4 released    Posted: Mon Mar 20, 2017 11:10 pm

lkaufman wrote:
carldaman wrote:
Nordlandia wrote:
Do principle of "Major Piece Redudancy" affects Komodo evaluation if there is two queens for one side, and many pieces remaining elsewhere on the board?

Penalty for the Queen pair (Larry Kaufman called it "principle of redundancy" although how much of penalty implied is unknown. In theory rook pair, knights and queens suffers from this.

Viktor Korthnjoi --->

Hypothesis "Having two Qs may be clearly worse than having a Q and 2 Rs. That would definitely be a special case.

 Quote: During the analysis, I discovered something very remarkable: the board is simply too small for two Queens of the same color. They only get in each other's way. I realize that this might sound stupid, but I fully mean it. The advantage is much less than one would expect by counting material.

[d]1rbqnk2/4ppbp/p2p2p1/2p5/2P1PP2/3P2PP/1P1QN1B1/q1BNRRK1 w - - 0 1

Besides redundancy, a simplistic argument would be that the second Queen is only worth a Q-1 since the promoted pawn goes off the board. Add to that the fact that 2R = Q+1 and you already have a 2 point deficit when comparing a 2nd Q to 2R.

The diagram shows R + N for the queen, not two rooks.

The reply was aimed at the quoted 'hypothesis' statement, not the diagram.
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Re: Komodo 10.4 released Carl Langan Mon Mar 20, 2017 11:10 pm
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