zafuri95 wrote:Speaking of which, how does one understand the direction of play (not opening, mid game that kind) ?
Direction of play is one of those concepts that the bots are telling us we have to reconsider. That said, there are some things that still hold true.
For instance:
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- Click Here To Show Diagram Code
[go]$$Bc Box shape
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$$ | . . . , . . . . . , . . . . . , . . . |[/go]
The enclosure in the top left wants to develop towards the top side, because

and

work with it to form an ideal box shape framework. We say that the enclosure faces the top side.
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- Click Here To Show Diagram Code
[go]$$Bc Box shape, not!
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$$ | . . . , . . . . . , . . . . . , . . . |[/go]
By contrast, if the top left enclosure faces the left side, then

and

do not form an ideal framework.
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- Click Here To Show Diagram Code
[go]$$Bc Direction of play (?)
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$$ | . . . , . . . . . , . . . . . , . . . |[/go]
Carrying the idea further,

was considered an ideal approach for Black, given the top left enclosure, because it starts to develop the top side for Black. Before the 20th century,
a was also considered ideal, but it was easier to pincer than the high approach.
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- Click Here To Show Diagram Code
[go]$$Bc Popular no komi opening
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$$ | . . . , . . . . . , . . . . . , . . . |[/go]
Carrying the reasoning even further,

was considered a good reply to

-- it still is, BTW --, because it prepares

, in anticipation of a possible top left enclosure. IOW,

followed by

is the correct
direction of play.
This reasoning takes a few steps, and there is some doubt with each step. And it may be correct. However, the bots are telling us that any effect is small, 2% or less.
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- Click Here To Show Diagram Code
[go]$$Bc Bot opening
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Through

we have one of the openings played by AlphaGo. Elf likes

, but

violates the
direction of play. AlphaGo prefers
a, but it violates the direction of play, as well, since it allows an ideal pincer in relation to the top right enclosure.
$$Wcm6 Bot opening, continued
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- Click Here To Show Diagram Code
[go]$$Wcm6 Bot opening, continued
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allows

, which leads to an ideal Black development of the right side. Just looking at the board, Black looks ahead. But remember that White has the move and Black is giving 7½ pt. komi. Elf thinks that the play up to now has been even. (Elf also is more optimistic about Black's initial chances than other bots, but that's another question.) OC, Elf could be wrong. But, IMHO, it is unlikely that

is a game losing play.
What follows is my opinion.
It is not that plays dictated by the traditional understanding of direction of play are bad. Rather, the line of reasoning behind it is open to question. (This is true, BTW, of long variations, even ones that claim to be one lane roads. Each move is open to question.) In addition, there are other good plays, perhaps even better plays on the board early in the game. But late in the opening or early in the middle game, the plays indicated by direction of play are much more likely to be the best plays, because the good alternatives have already been taken.
So is it worth studying direction of play if you haven't already? I don't think so. The plays that accord with direction of play in the late opening or middle game can be derived from simply considering development, which is easier to do and has fewer steps of reasoning.
