trivial question about double pawns

[giggetto71]

Hi,
I have a super trivial question about how to count doubled pawns. In this position [fen]8/p5k1/1pp1pp1p/2p2P1p/3P4/P1P5/P1P2PKP/8 w - - 0 1[/fen]
What is the number I should consider for white doubled pawns? Is it 3 or 6? I would be inclined to consider 6 but I just wanted to be sure.
thanks!

[JVMerlino]

Myrddin would evaluate six of the pawns as doubled.

[Joost Buijs]

It doesn't matter whether you count 3 or 6 doubled pawns, it solely depends upon the penalty you give for a doubled pawn.

[ernesto]

In Nawito, the isolated and doubled pawn they are penalized twice if they can be stopped by a single pawn, like the doubled pawn on H of your picture

[BeyondCritics]

Hi,
I have a super trivial question about how to count doubled pawns. In this position [fen]8/p5k1/1pp1pp1p/2p2P1p/3P4/P1P5/P1P2PKP/8 w - - 0 1[/fen]
What is the number I should consider for white doubled pawns? Is it 3 or 6? I would be inclined to consider 6 but I just wanted to be sure.
thanks!

A doubled pawn is some kind of aggregate, consisting of exactly 2 pawns on the same file.
Why do I know that? Because of my experience with chess literature. Generally there is nobody who has the authority to define chess concepts. Most chess book authors don't bother to define even the simplest one. Hence every once in a while, some new chess programmer posts a question here about some human chess concept, for which he could not find a clean definition and usually he is helped here...

[ernesto]

I take as doubled the pawn that has another of the same side behind. So it would be 3 in your case. I do not like to consider the 2 in the same column as doubled, since if 1 is removed the other will stop being doubled

[Bo Persson]

I take as doubled the pawn that has another of the same side behind. So it would be 3 in your case. I do not like to consider the 2 in the same column as doubled, since if 1 is removed the other will stop being doubled

But you get the same result if you give the first pawn a 20 point penalty, or penalize them both with 10 points each.

[ernesto]

I take as doubled the pawn that has another of the same side behind. So it would be 3 in your case. I do not like to consider the 2 in the same column as doubled, since if 1 is removed the other will stop being doubled

But you get the same result if you give the first pawn a 20 point penalty, or penalize them both with 10 points each.

Yes, it's true. I think it is more of a philosophical question, since in practice any of the 2 is valid

[JVMerlino]

Myrddin gives the doubled pawn penalty to both pawns. If there is an opposing pawn blocking the doubled pawns, then both the doubled pawns get the blocked penalty as well.

Code: Select all

#define DOUBLED_PAWN_MG		2	// penalty for doubled/tripled pawns
#define DOUBLED_PAWN_EG		19
#define BLOCKED_DOT_PAWN_MG 	3   	// penalty for doubled/tripled pawns that are also blocked
#define BLOCKED_DOT_PAWN_EG 	0

[Ferdy]

Hi,
I have a super trivial question about how to count doubled pawns. In this position [fen]8/p5k1/1pp1pp1p/2p2P1p/3P4/P1P5/P1P2PKP/8 w - - 0 1[/fen]
What is the number I should consider for white doubled pawns? Is it 3 or 6? I would be inclined to consider 6 but I just wanted to be sure.
thanks!

I consider a2, c2 and f2 as doubled pawns for white.
Its penalty is higher at lower ranks.