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Topic: My Personal GM Tutor
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The above mentioned technique revolves around building and modifying a repertoire; a set of moves (with alternate variations) from the opening that would be expected to be followed by both players; usually any deviation indicates a weakness that can be exploited.
A good example is this game:
Here Black's repertoire book move should of been 4. ... Nf6, but instead he played d6. My normal book move is 5. d4 which I figured would still work because the Koltanowski has some vicious mating traps that I figured I could exploit. As it turned out I went down two pawns and was only able to gain one back (eventually) and ended up losing in the endgame.
So I went back with Rybka to figure out the proper reply to 4. ... d6. I found first 5. c2 and then started generating theory for the following moves. Its then that Rybka showed me the queenside trapping of the knight and bishop; I noticed that the bishop moving to b4 was scored very badly and in the variation I could see where the queen grabbed it because it was hung. So I entered this variation into my repertoire like a spider waiting for a fly. 
The Multi PV setting determines how many candidate moves are scanned by the engine and displayed.
Right now I use three different engine settings:
1) Multi PV of 1 -- This is when I'm generating theory for the opposition and I only want to see the best move and as quickly as possible.
2) Multi PV of 5 -- This is when I'm generating theory for myself and I need to see alternate candidates because the top line eventually goes sour or I disagree with the suggested top line.
3) Multi PV of 30 -- This is when I have existing theory that I am scanning for tricks and traps. What I look for at this point is a candidate move that would normally be thought of as acceptable by an opponent (a move that I could see myself possibly choosing) but that the engine scores as -1.00 or worse. I then add the move to my repertoire as a "?" move and include the appropriate moves to exploit the error.
The key to all of this is to examine the candidate moves and their variations. When you see a peculiarity, ask "why?" and look for the answer. The more you inquire about and investigate the reasons for the candidate moves, the more you learn about the position; the more the engine "tells you" about it. 
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Are these Rybka settings? My copy of Rybka came from ChessBase and operates under the Fritz GUI, and I don't see anything about Multi PV settings.
UM..I might have found it. It might be what's called "Monte Carlo" in this interface. I have to have Rybka activated for it; Fritz can't do it. Interesting.
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Oh wow ya interesting. The interface I use is Arena and its freeware.
I used to be able to do it with Chessbase and Crafty a couple of years ago too.
I just started playing chess again and now prefer the Arena and Rybka 2.3 really rocks! 
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OK, I downloaded Arena. If this is too much to ask, just say so and I will understand. How do you actually get it to do what you're talking about? Thanks.
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No problem.
Everything can be accomplished by left-clicking the mouse. It just depends where you left-click.
First (if you want to use Rybka) you should download the final free version. You should go to the Rybka homepage (www.rybkachess.com) and download the version 2.3 (Arena comes loaded with 2.2). Put it into your Arena folder, using the existing sub-folder "Engines".
Secondly, you need to make sure the analysis area is visible so you left-click on the chessboard; the option "Show analysis area" should have a black check mark, if not, select it.
Third, you need to load Rybka as the first engine. Here you have to click the "Engines" menu at the top of the screen and select "Manage". Click the "Details" tab and hit the "New" button and then select the 32-bit Rybka 2.3 file that you downloaded. I suppose you could then hit the button "Start this engine right now!".
Ok whew. Now down to business. The way you change the Multi PV value is by again left-clicking the analysis area and choosing "Configure Rybka 2.3". Down in the lower left there is the field called MultiPV; that's the number of candidate moves displayed.
Now, there are three different options for engine use:
1) Engine disabled -- you accomplish this by hitting the "edit" button underneath the chessboard and making sure the "analysis" button is not hit.
2) Engine analyzes only -- make sure the "analysis" button is hit.
3) Engine plays a game -- make sure neither the "edit" nor "analysis" buttons are hit.
The rest is up to you. What you put into it in the way of inquisitive investigations of the candidates, determines how much you will learn about any particular position.
Enjoy!
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