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Knight=Bishop on a 10x10 board[Subject Thread] [Add Response]
Aurelian Florea wrote on Mon, Feb 22, 2021 08:53 AM UTC:

After the enhancements I used for the knight in Apothecary Chess I realized that the knight is stronger than a bishop. I am trying to create a knight enhancement that makes the knight equal to the bishop on a 10x10 board. I have tried NmA, NmD, NmH. I have then chose a game where white has bishops and no knight and black has knights and no bishops. For the NmA the winning percentage of points for white is 52%. But for the NmD and NmH the percentages of points for white are much higher (around 75%). These experiments were made in ChessV. I wonder why this difference. I have checked the game files and they are as intended. I think the NmA, NmD and NmH should make around the same percentages. Any idea why this guys?


Greg Strong wrote on Mon, Feb 22, 2021 05:19 PM UTC in reply to Aurelian Florea from 08:53 AM:

How many games are you playing to get these percentages?


Jean-Louis Cazaux wrote on Mon, Feb 22, 2021 05:25 PM UTC in reply to Aurelian Florea from 08:53 AM:

"I realized that the knight is stronger than a bishop." Do you mean that? I had the feeling that on a 10x10 the Bishop is the strongest.


Greg Strong wrote on Mon, Feb 22, 2021 05:33 PM UTC in reply to Jean-Louis Cazaux from 05:25 PM:

He means the knight in Apothecary Chess, which is augmented, is stronger then the bishop. There are two different Apothecary games. In one, the Knight is augmented by a non-capturing (3,2) zebra move. In the other, it is augmented by non-capturing (2,2) and (3,0) moves.


Aurelian Florea wrote on Mon, Feb 22, 2021 06:08 PM UTC in reply to Jean-Louis Cazaux from 05:25 PM:

@Jean-louis Cazaux In apothecary chess Clasic the knight may also move as a zebra but not capture. In apothecary chess Modern the knight may also leap 3 orthogonally or move as an alfil, but not capture. These are too strong enhancements. I am trying to get to something that will keep the knight and bishop equal.


Aurelian Florea wrote on Mon, Feb 22, 2021 06:09 PM UTC in reply to Greg Strong from 05:19 PM:

@Greg Strong For the alfil enhancement I used 512 games. For the other two I've stopped around 100. That is beacuse I had though the results to be weird.


Greg Strong wrote on Mon, Feb 22, 2021 06:23 PM UTC in reply to Aurelian Florea from 06:09 PM:

I think it is likely that the results are weird because at only 100 games the error margin is high. Testing is time-consuming, so it is tempting to stop a test early based on initial results, but if you do that you do not have an accurate measurement and are responding to noise.


Jean-Louis Cazaux wrote on Mon, Feb 22, 2021 08:29 PM UTC in reply to Aurelian Florea from 06:08 PM:

Sorry, I missed that important point. Btw, no "e" in my name :=)


Aurelian Florea wrote on Tue, Feb 23, 2021 08:29 AM UTC:

@Greg

I don't think 75% can be explained by random noise, for something that was meant to be around 50%.


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