Archaic/CreatingPotentialByAddingStonesToAnArea

19x19 diagram  

This is the original diagram...as you can see when black adds a stone at 1 white is forced to defend at 2 lest black move out initially with A (see below diagram)...2 doesn't gain white that much at least on that side and black can now apply tesuji to push white further into his tiny corner by playing 3 and 5...this is just a general principle of how adding that initial stone at 1 created a beneficial situation...

19x19 diagram  

Black 1, white tenukis, black moves out at A.

corner  

This is a common moveset if I'm not mistaken not sure if 2 is a two-space extension but anyway...by adding a stone at 3 it prevents the bad things from happening see diagrams below.

(Having that stone there "might" be be played rather than not playing it at all depending on if black wants to play a see diagram below, i am not too good with tewari yet so...)

corner  

If black wants to play 4 then well...it best be that you added a stone in the corner as was suggested in the above diagram before jumping out at 3 because this variation ends in gote for white and gives black some added territory if and only if white really has no other choice than to respond.

corner  

Now if black wants to try to take some territory again...this is what will happen bad things for black of which others can give variations and I'll explore some variations to be continued (I am just trying to see the reasons) variations to be continued...

corner  

As you can see reverting to the normal exchange once again white doesn't give black a prisoner point by playing at the circled stone because black filled in one of his territory at the marked square stone...also white has the descent later at 'a' for some possible endgame moves in sente so this is another variation that supports the thinking behind adding a stone to the corner...

15x15 diagram  

The game where I saw this by a high dan was on a 15x15 board and it was a bit different I'm not sure if I remember the position completely so I'll just provide a rough example here don't look at the variations much just the principle (in the actual game it was extremely relevant because white had much more territory than black and black couldn't afford letting white run towards the center and escape and win the game so he chooses to try to capture him outright by running him with 4 into his stones...)by playing 5 here white seeks to add an invasion stone to the top right corner to leave aji there and also it is now miai if black pushes upward with 'a' white moves to 'b' and escapes out towards the center to win the game if black tries to cap white with either 'b' or 'c' white plays 'a' and threatens to capture the '2' stone and make life and or if black then runs out with '2' after white plays 'a' following black's capping move then the variations will inevitably become much better than if white had simply tried more brutally poor moves shown in the diagram(s) below.

15x15 diagram  

Here white tries to escape directly and pushes black along the third line helping him to secure his territory and also reducing the ability for white to escape better...

19x19 diagram  

This is called "The Block:" another technique where you attach to the opponent then tenuki and play elsewhere...with this added stone here the opponent can no longer make the usual extension he would like to make because your stone is hindering the entire upperside! this can be called a forcing move if the opponent is forced to respond even if he doesn't respond you get some interesting variations to gain from it...black would normally respond by just doing 'a' or 'b' in which case you would just revert back to the above explanation of having an added stone effect in that area "without your opponent gaining much at all!", if he does 'c' or 'd' you can just run out with your stone!

19x19 diagram  

As we can see with 1 here white adds a stone at 1 here to create an interesting scenario, black jumps out at 2 white 'a' (to connect underneath) and 'b' become miai (if black caps at 'b' white connects underneath at 'a', if black 'a' white 'b' or 'c') this example is more ordinary obviously but it's another example...in this case white adds an invasion stone to black's moyo and adds another dimension of variations that all lead to a more favorable result for white than if white hadn't added that stone there...the opportunity might not be there in the future also relevant to the order of move that the game progresses in...

TO BE CONTINUED

19x19 diagram  

I've seen a pro do this once...this isn't the exact position but...the idea is that by adding a stone at '1', black pincers '2' white can tenuki and play at '3' because he can just let the '1' stone sit there and become aji for the future even if black covers at 'a'...and with the stone at '3' the entire local situation becomes different and gives rise to new variations...(white can invade at the 3-3 point in the future and the variations would still be different because of the added stone at 3).

19x19 diagram  

The only way this would revert to "back to a normal position" is if both players played this way (usually it won't revert to this position because due to the order of moves this game was played in it would turn out differently).

19x19 diagram  

Pretty sure I got this joseki wrong correctly but this is the idea, '2' tenukis, the idea is that placing a stone at '4' for black adds aji...

19x19 diagram  

If white plays 1 first, without adding a stone at 2, black will take 2 and white can no longer have that additional aji in that area and this game becomes a different game entirely.

19x19 diagram  

This is a classic example, black captures at 'a', '9' prevents black from crawling under white's formation in possible sente because if black then tries to capture the lone stone at '9' with 'b' white gets 'c' and threatens to capture black's stone in return, black can then either leave this position hanging or come back to it later and capture, and white can have an added opportunity to capture black if he doesn't capture that stone eventually...white even gets the opportunity to protect his cut now (though in gote) with a tiger's mouth connection at 'd'...

19x19 diagram  

White tenukis 'a', black gets to make an added move here for free in sente possibly and if white blocks 'b' he no longer has the opportunity to capture black's lone stone or force black into gote by capturing white's added stone as shown in the previous diagram...now white has a cutting point at 'c' as well which black can take immediate advantage of if the ladder is in his favor.

Forcing moves are another example of adding a move which creates depth without your opponent gaining in the process, a peep for example is one type of forcing move, so play as many forcing moves as possible (add stones everywhere if it retains you sente and helps you gain in the process).