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Peter Fendrich

Hi Ed,
I played around with your PV-extension idea. I have a similar extension in Alaric but wanted to try your way. I interpret it as "every 6 ply with only PV-moves do extend". That means after 12 ply with only PV-moves you will extend again.
Now I read something you said that puzzled me. "it happens only a few times in the late ending that eventually 2 plies are extended" Your post

But I suppose that ProDeo goes deeper than 12 ply in many positions in 2-3 minutes?

Maybe I misunderstand something here.
/Peter

ed

### Re: @Ed about PV extension

Hi Peter,

Misunderstandings indeed....

Example:

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.0-0

1.. e5 and 2.d4 are 2 continues PVS moves (a pair) ---> counter++
2.Nf3 Nc6 are 2 continues PVS moves (a pair) ---> counter++
2.. Nc6 3.Bb5 another pair ---> counter++
3.Bb5 a6 another pair ---> counter++

counter=4: { extension(); counter=0; }

3.. a6 4.Ba4 pairs --> counter++

etc.

Hope this helps,

Ed

Peter Fendrich wrote:Hi Ed,
I played around with your PV-extension idea. I have a similar extension in Alaric but wanted to try your way. I interpret it as "every 6 ply with only PV-moves do extend". That means after 12 ply with only PV-moves you will extend again.
Now I read something you said that puzzled me. "it happens only a few times in the late ending that eventually 2 plies are extended" Your post

But I suppose that ProDeo goes deeper than 12 ply in many positions in 2-3 minutes?

Maybe I misunderstand something here.
/Peter

Peter Fendrich

### Re: @Ed about PV extension

Hmmm,
maybe I have porridge in my brain now....

You extend at 3... a6 that is ply 6.
I said next time at ply 12, a mistake yes. In real it will be 11.

3... a6 4.Ba4 Nf6 5.0-0 b5 (suppose they all are pvs-nodes.)

You will extend b5 ply=11 as earliest.

2 extends only in late endgames?

I am not trying to trap you
Just trying to understand!

/Peter

ed

### Re: @Ed about PV extension

Perhaps I am a bad explainer

The my web-site description: http://www.top-5000.nl/authors/rebel/chess840.htm#PVS

Ed

Peter Fendrich wrote:Hmmm,
maybe I have porridge in my brain now....

You extend at 3... a6 that is ply 6.
I said next time at ply 12, a mistake yes. In real it will be 11.

3... a6 4.Ba4 Nf6 5.0-0 b5 (suppose they all are pvs-nodes.)

You will extend b5 ply=11 as earliest.

2 extends only in late endgames?

I am not trying to trap you
Just trying to understand!

/Peter