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Refined positional evaluations

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Yigor
DanlsTheMan wrote:
Yigor wrote:

Chess example: if Blackburne were motivated only by "common sense", he could never play the Jerome gambit, sacrificing the queen and both rooks in order to put one of most incredible mates in the chess history. 

Funny, my last name is Blackburn

 

Hahaha ... it's unexpected (I've just noticed that it's written in your profile). blitz.pnggrin.png

Yigor
DanlsTheMan wrote:

Maybe another "coincidence" is that I've recently came into a position with a possible queen sacrifice, but wasn't able to calculate well/deep enough to decide if would lead to a "good" position. After studying it more (later on), if in that position again, I may decide to try it next time.

My calculation/tactics need serious attention in order to pull it off.

 

Look at the nice queen sacrifice blitz.pngwq.pngblitz.png in this game:

https://www.chess.com/daily/game/201145944

Yigor

Bumping for possible additional considerations. peshka

Yigor

Sicilian Najdorf:

 

 

WK (white's control of the kingside) = 18,

BK (black's control of the kingside) = 17,

PevK = +0.06

WQ (white's control of the queenside) = 18,

BQ (black's control of the queenside) = 15,

PevQ = +0.20

Pev = 0.20 + 0.06 =0.26

SF14 engine evaluation =+0.3. settings

tygxc

#24
You cannot arithmetrically evaluate such a position after 5 moves with 30-men except as a draw.
Engine evaluations only approach meaningful figures in positions below 26 men.

Yigor
tygxc wrote:

#24
You cannot arithmetrically evaluate such a position after 5 moves with 30-men except as a draw.
Engine evaluations only approach meaningful figures in positions below 26 men.

 

My count just shows numerically that white (with 2 developped knigts)  is more active on the queenside. Also devdeg = 4/2. 😎

tygxc

#26
"My count just shows numerically that white (with 2 developped knigts)  is more active on the queenside."
++ Your count does not match reality in this case. Black is more active on the queen's side: the open c-file, pawn advance ...b5 to come, possible ...Qb6 to come. White is more active on the king's side: f4 or g4 to come. 

"Also devdeg = 4/2" ++ I would say 2/1: 6 white pieces on initial squares and 7 black pieces.

Yigor
tygxc wrote:

"Also devdeg = 4/2" ++ I would say 2/1: 6 white pieces on initial squares and 7 black pieces.

 

Yeah, it depends on definitions. 😎 I just proposed a modification here:

https://www.chess.com/forum/view/chess-openings/development-degree-of-an-opening

tygxc

#28
The position is even: draw with best play from both sides.
White leads in development.
Black has an extra central pawn.