Never understand why we play h6 in following position, if white with Bh4 mantains the same threat, and it is not supposed to play g5. What's the point of this move?
Why we play h6 in QGD?
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Sep 25, 2019
0
#2
It's just a usual prophylactic move in the sense of Nimzovich. 
https://en.wikipedia.org/wiki/Prophylaxis_(chess)
But it was better to hold the f7-g7-h7 pawn line at this time, than break it with h6? Play b6 or Nbd7, for example?
Sep 25, 2019
0
#4
FonsecaSF wrote:
But it was better to hold the f7-g7-h7 pawn line at this time, than break it with h6? Play b6 or Nbd7, for example?
This alternative plan is ok too, it's the matter of taste. 
ok, thank you for your help!
Sep 25, 2019
0
#6
It's prophylactic move to have a square foot the king in the future, to avoid mate on the last line
@namelesss and @pfren First of all, thank you for your insights! I play this since my beginnings, but never questioned myself. Indeed, from your comments, i can see at least two advantages. Opens king escape, with a tempo on white, and protect the pawn again the d3 bishop attack. I agree with your comment @pfren, if i play h6 in move 5, it is stronger, as i don't show my castle intentions just yet.
One question more, If Bd3, like it was said, it isn't better to have the pawn in h7 to be able to play g6 if really needed? Closing diagonal b1-h7 and end the threat of the bishop sacrifice or even checkmate in h7?
ty, I'll give them a look, by the name i'm not familiar with them
ah, didn't know that!
Sep 25, 2019
0
#12
FonsecaSF wrote:
Indeed. Seems as though you may be seeing ghosts and overthinking it abit. "Putting the question to the bishop" is a common theme. Creating a luft and gaining some time (temporarily) if not 7. Bf6, with 7. ... Bf6 gaining the Bishop pair (taking the dominant dark square line). Personally, I play 6. ... h6 namely to get into my Tartakower or Lasker lines after 7. Bh4: 7. ... b6 or 7. ... Ne4 respectively. Otherwise, I wouldn't necessarily play ... h6, but rather ... Nbd7 as mentioned by previous posters.
Never understand why we play h6 in following position, if white with Bh4 mantains the same threat, and it is not supposed to play g5. What's the point of this move?