This new mode helps the chess players to check their knowledge of opening and also points out the inaccuracies and the mistakes and provides recommendations on their elimination.
In this mode you should play out the opening as White or as Black selecting the best moves according to your opinion.
You can perform an opening testing for any defined opening (select its name in the openings’ list), for any particular opening index, or starting from any particular opening position.
It is also possible to select a player from the game database, who will be “acting as your opponent” (the program will select moves from the player’s opening repertoire).
You can start testing opening in the following modes – Tree, View or List.
In order to begin testing opening, do the following.
Open a game database with the constructed tree, which will be used for testing (the base Hugebase is recommended).
Click the 
button on the upper toolbar, or select the menu item Advanced/Test opening.
The dialog window Actions will open:
If you start Test opening from the List mode, then Test for current position check-box will be deactivated and this option will be unavailable.
Select a side (color of pieces) in the Test for drop-down list, for which you will test the opening.
In order to start testing from some particular displayed position, set the mark in the Test for current position check-box. You can move to the necessary position in the View or Tree modes.
If you wish to check you knowledge of any particular opening, then set the mark in the Select opening check-box.
If you enable the Testing for opponent option, then the reply moves shall be selected in the opening repertoire of a chosen player. Searching an opponent will be performed in the game database, from which the Test opening mode has been launched; therefore, it is desirable to use Hugebase.
The program will respond in the same way, as the chosen opponent would have played in this position. If the opponent’s moves cannot be found in the selected position anymore, then the program will select the moves from current database. At that, the program selects a move in a random manner, and repeating test in the same position allows you to check out other continuations and opening variations.
Click the OK button. When Testing for opponent check-box is marked, then this action opens the Prepare for your opponent dialog window:
Select a player from the players’ library. You can also set the time period for the opponent by setting the mark in the Dates check-box.
Click the Run button.
The program will start searching games of the selected player and constructing the player’s opening repertoire. This may take some time.
If the Select opening check-box has been marked, then the Opening navigator window will open:
Here you can select an opening by its name, then select the precise opening index in the Select opening index window.
The corresponding position will be diagrammed.
Click OK button.
The testing window will open:
While you make the moves on the board, the program will make moves in reply. At any moment you can interrupt the testing by clicking the 
button.
If you run into a position that has not occurred in the database, the program will display the following message box:
After clicking Yes button, you can play out the current position against the engine.
After clicking the No button, the testing will be interrupted and the following window will open:
You can continue testing this variation from any move by clicking it with the mouse and then clicking the OK button. The results of the previous test will be saved. If you test the variation for four or more timed, the program will generate commentary to the result of all the attempts.
You can switch to testing of another opening by clicking the button New opening.
You can also stop the testing by clicking the button End testing.
The test results are stored in the database Test openings. Start viewing the game:
Testing results and evaluations are given in the game notation and in the Messages tab under the board.