Manual de Deep Fritz 14 2013 | Page 55

General operation

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The number to the right of the lamp gives the position value, above –0.87. The
evaluation is expressed in pawn units, always from the point of view of White (i.e. –
0.87 is good for Black). A value of 3.00 pawns would mean that White is a piece up –
either a bishop or a knight, which are both equivalent to about three pawns. Rooks are
worth five and the queen about nine pawns. If the values deviate from whole numbers
this is the result of additional positional considerations (mobility, deployment of pieces,
king safety, pawn structure, etc.). In addition to the precise pawn values, the
evaluation is also given in standard chess symbols: +– means White is winning, –+
means Black is winning, = means the position is drawish.
The search depth tells you how many moves deep the search has progressed. The
value is in “ply” or half-moves. The first number gives you the “brute force” depth, the
second is the depth to which certain critical lines have been investigated. The value is
in “ply” or half-moves. For instance a display of “depth = 12/30” means that the
program has looked at every continuation to a depth of 12 ply (six moves), while some
promising or dangerous continuations are being examined up to a depth of 30 ply.
After it has played a move, the chess engine shows you which move it expects
you to choose (in the field after the depth field).
Finally you can see the speed at which it is running: “634kN/s” means the program
is generating and evaluating 634,000 positions per second (“kilo nodes per second”).
Right-click this display if you want to see the total number of positions instead.
In the section below the search information you see the “principle variation”, i.e.
the best continuation the program has found so far. Together with the search
information the total number of positions is also given. In the above example the
engine has looked at 4.061 million positions to come up with the third line. You can
right-click the display and select more or less information, and decide whether the
history of the search should be scrolled. You can also insert a small “variation board
on which you can play through the main line the program is considering.
Right-click menu in the engine window

If you right-click the
engine window, you get a
menu with a number of
functions or options to set.
Some of the items will only
be available when the
program is in Analysis mode
(Alt-F2).

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