Search mask, Position.
This allows you to search for positional fragments, including strategic and tactical manoeuvres based on pawn structures and piece constellations.
There are three definition boards:
| □ | The “Look for” board: Here the pieces are set on the squares on which they must be in the positions you are looking for. |
| □ | The “Or” board: This allows you to define fuzzy positional fragments such as “all positions in which piece x is on square a, b or c”. |
| □ | The “Exclude” board: With this you can establish which pieces should not be on specific squares in the positions you are looking for. |
To put a piece on a square, first select a piece type on the right. A click on the square on the board will put the piece there. Clicking with the right mouse key will insert a piece of the opposite colour. The “joker” symbols on the bottom mean any white and any black man (pieces or pawns).
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On the Exclude board you can place up to four different pieces on a square. To remove any one of them press Crtl and click it. The same also applies to the Or board. |
Mirror horizontal/vertical
The “Horizontal mirror” and “Vertical mirror” reflect the board horizontally and vertically. In the above example the horizontal mirror will ensure that games with a black bishop penetration on h2 will also be retrieved.
First, length, last
These options define when and how long the positional fragment should be present during a game. If the positional constellation appears in the game before the “first” or after the “last” move specified than it is ignored. “Length” refers to the minimum number of consecutive ply (half-moves) the pieces must be on the board.
Sacrifice
This specifies if a sacrifice combination must be involved.
Get board
This inserts the position from the last active board window.
Examples of strategic themes
| A. | Rook on open c-file |
Search board: wRc1.
Exclusion board: White and Black jokers on squares c2-c7
| B. | White isolated pawn on d4 |
Search board: wPd4
Exclusion board: wPc2-c7,e2-e7,d5-d7
| C. | White passed pawn on e5 |
Search board: wPe5
Exclusion board: bPd6,d7,e6,e7,f6,f7