This change allows to remove some quite a bit of code
and seems the natural thing to do.
Introduced file thread.cpp to move away from search.cpp a lot
of threads related stuff.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Prefetch both pawn and material tables in do_move() and
prefetch always, not only after a pawn move or a capture.
Speed up of 0,7%
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This patch is based on Justin Blanchard's original
work and allows to breakdown evaluation in its sub terms and
show to the user.
Tracing code has zero speed impact when not used.
Note that tracing code is not thread-safe, but this
should not be a problem given the typical usage scenario.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Use Square instead. At the end is the same because we were
anyway foreseen operators on mixed terms (Square, SquareDelta).
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Keep the isChess960 flag inside Position so that is
copied with the Position, but esplicitly highlight the
fact that a FEN string has not enough information to detect
Chess960 in general case. To do this add a boolean argument
isChess960 to from_fen() function so to self document this
shortcoming of FEN notation.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This is the "selective search depth in plies" and we set
equal to PV line length.
Tested that works under FritzGUI.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This time we try very hard to avoid false positives.
The obvious downside is that we also miss many true
winning positions.
After 10544 games on RC
Mod- Orig: 1744 - 1646 - 7154 ELO +3 (+- 2.7) LOS 83%
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Plus some other icc warnings popped up with new and strictier
compile options.
No functional and speed change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Get rid of macros and use templates instead,
this is safer and allows us fix the warning:
ISO C++ forbids braced-groups within expressions
That broke compilation with -pedantic flag under
gcc and POPCNT enabled.
No functional and no performance change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Were removed when merged from Glaurung 2.2, but without
any test.
Note that weight has been increased from original 2 to 4 and
has been also fixed a bug where in the original version were
considered also diagonal sqaures for the rook, that are
contact squares but not checks.
After 4449 games at 30"+0.1
Mod - Orig: 717 - 649 - 3083 ELO +5 (+- 4.1)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
And also other check bonuses.
After 4272 games on russian cluster at 30"+0.1
Mod - Orig: 711 - 612 - 2949 ELO +8 (+- 4.2)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
More then 100 lines of almost useless evaluations. Prefer
code semplification to a very small and dubious advantage.
After 7457 games on russian cluster:
Mod - Orig: 1285 - 1334 - 4838 ELO -2 (+- 3.2)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Currently are used by evaluation itself and the
whole EvalInfo will be removed from global visibility
by next patch, so no reason to use them.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
It will be more clear when we will go to add stuff
apart from king danger itself.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
First accumulate the bonus for each pawn, then call the
not very fast apply_weight().
Should be no functional change apart from rounding issues.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Set manually to zero the few fields that are
optionally populated and that's enough.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Avoid one address lookup in a very critical time path.
Unified also outpost bonus tables for knights and bishops.
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Another 100 lines of dubious and ad-hoc code.
After 7644 games on russian cluster:
Mod - Orig 1285 - 1249 - 5110 ELO +1 (+- 3.2)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Plus a bunch of other minor optimizations.
With this power pack we have an increase
of a whopping 1.4% :-)
...and it took 3 good hours of profiling + hacking to get it out !
No functional change.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
One hundred lines of code should be compensated by an
important ELO increase, otherwise are candidate for removal...
...and is not the case. We are well within error margin, so
remove the code even if we lose a couple of elo points, but
semplification is huge.
After 6494 games on russian cluster
Orig vs Mod 1145 - 1107 - 4242 (-2 ELO)
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
The one in evaluate_passed_pawns() is just a micro
optimization, the other in evaluate_unstoppable_pawns()
is indeed a fix, although almost unmeasurable in real
games.
Bugs report and fixes by Marek Kwiatkowski
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
