With Gandalf 6 update 1 it is possible to create your own personallities, this page gives some step by step instructions on how to do this.

First step is to download and install update 1. To download the update, start ChessPartner then from the Help menu select Help on the Web -> Check for updates. The browser will open up; then follow the Gandalf 6 updates links to find the update. After downloading the update just run the file and it will install the update.

The next section shows how to load the personalities. 

Only the native engine provides support to load personalities from files. This can be done from the engines properties dialog  ( press F4 or select Extra -> Engine properties ). The following dialog shows up:

To select a personality simply select one from the dropdown box, after clicking the Appy button the various parameters will be updated to reflect the loaded personality.

The UCI version does not support loading personality files but it does support all the parameters as shown in the native engine. Although a bit less conveniant it still has the same functionallity.

Under ChessPartner you can create multiple Gandalf UCI engine profiles each with its own set of parameters. This may also work in other interfaces but how to do that is outside the scope of this article.

To create your own personality files start with copying one of the existing files. Best to start with Default.per You can find these files in the gandalf engine directory. Default installation path is:

c:\Program Files\Lokasoft\ChessPartner 5.3\engines\g60

Next rename the copied file to your liking, you can give it any name but the extension must be .per.

Now open the file with notepad ( or any other plain text editor ), you will see something like this:

PAWNSTR 100
PASSEDPAWN 100
PASSEDPAWNENDGAME 100
ATTACK 100
SAFETY 100
DEVELOP 100
BISHOPPAIR 100
KNIGHT 100
BISHOP 100
ROOK 100
QUEEN 100

Now just edit the values you want to change and save the file. The meaning of the parameter are explained in the next section.

A personality consist of a large number of parameters that can be adjusted. Default each parameter is set to 100 which means 100%. By lowering or increasing these weights the style of play can be altered. It is believed the default values gives the strongest and most balanced overall play but for fun you may want to create a super attacking style by setting attack to 200 and Safety to 50.

The parameters:

PawnStructure	Scaling of the The value of isolated pawns, double pawns
PassedPawn	Scaling of the Value of a passed pawn
PassedPawnEndgame	Scaling of the value of a passed pawn in the endgame
Attack	Scaling of the value of an Attack
Safety	Scaling of KingSafety
Development	Scaling of the importance on piece development
BishopPair	Scaling the value of the bishoppair
KnightEval	Scaling the evaluation of the Knight (not material only Positional value!)
BishopEval	Scaling the evaluation of the Bishop (not material only Positional value!)
RookEval	Scaling the evaluation of the Rook (not material only Positional value!)
QueenEval	Scaling the evaluation of the Queen (not material only Positional value!)