🚀 go-pugleaf

Here it is again:

>>>  post book force
>>>  e2e4 b7b6 d2d4 c8b7 f1d3 e7e6 g1f3 c7c5 c2c3 g8f6 d1e2 f8e7 e1g1 b8c6 e4e5
>>>  f6d5 d4c5 b6c5 b1a3 e8g8 a3c4 d8c7 f1d1 f7f5
>>>  depth 6 bd beep go quit

>>>  R - - - - R K -
>>>  P B Q P B - P P
>>>  - - N - P - - -
>>>  - - P N p P - -
>>>  - - n - - - - -
>>>  - - p b - n - -
>>>  p p - - q p p p
>>>  r - b r - - k -

So far I still find PL68 examining fewer nodes for this position than PL69.

When compiling with the options suggested by Kong Sian (thanks Kong!) I get
the same results as he posts.  The mods to history he supplied produces many
fewer node evals at ply 6 in pl69, but not as few as turning off HISTORY
altogether.  See results below.

Don Oetting noted that the scores were different by 5 points in the earlier
post.  I turned off all the caching and move ordering and still got the
5 point difference.  Also, under these conditions, PL69 examines many more
nodes than PL68, for the same ply depth.

I welcome further suggestions!  I have not yet begun to exhaust the
possible permutations for compiling gnuchess! :-)

Thanks,
Mike


P.S.

Here are the results in order of increasing evaluation nodes:
----------------------------------------------------------------------------
PL68: OPT=  -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DKILLT -DDEEPNULL
 6.     45  176   420217   e5f6  d5f6  h2h3  a8b8  c1g5  f6d5  g5e7  c6e7 
----------------------------------------------------------------------------
PL69: OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DDEEPNULL
 -DQUIETBACKGROUND -DSEMIQUIETBOOKGEN -DWAY4PL64 -DKILLT -DHASHSTATS -DAGING 
 6.     40  173   501680   e5f6  d5f6  c1g5  a8b8  g5h4  f6h5  h4e7  c6e7 
----------------------------------------------------------------------------
Mike (Same as Kong, below; has history mods)
PL69 NEW HISTORY: OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DDEEPNULL
 -DQUIETBACKGROUND -DSEMIQUIETBOOKGEN -DWAY4PL64 -DHISTORY -DKILLT -DHASHSTATS
 -DAGING
 6.     40  250   587616   e5f6  d5f6  c1g5  a8b8  g5h4  f6h5  h4e7  c6e7 
----------------------------------------------------------------------------
Kong (with history mods)
PL69 NEW HISTORY: OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DDEEPNULL
 -DQUIETBACKGROUND -DSEMIQUIETBOOKGEN -DWAY4PL64 -DHISTORY -DKILLT -DHASHSTATS
 -DAGING
 6.     40   61   587616   e5f6  d5f6  c1g5  a8b8  g5h4  f6h5  h4e7  c6e7 
----------------------------------------------------------------------------
Mike (same as Kong, except for third number 586)
PL69: OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DDEEPNULL -DQUIETBACKGROUND
 -DSEMIQUIETBOOKGEN -DWAY4PL64 -DHISTORY -DKILLT -DHASHSTATS -DAGING 
 6.     43  586  1903267   e5f6  d5f6  c1g5  a8b8  g5h4  f6h5  h4e7  c6e7 
----------------------------------------------------------------------------
Kong
PL69: OPT= -DUSEINT -DCACHE -DGDX -DHASGETTIMEOFDAY -DDEEPNULL-DQUIETBACKGROUND
 -DSEMIQUIETBOOKGEN -DWAY4PL64 -DHISTORY -DKILLT -DHASHSTATS -DAGING
 6.     43  185  1903267   e5f6  d5f6  c1g5  a8b8  g5h4  f6h5  h4e7  c6e7 
----------------------------------------------------------------------------

These were too slow to run to 6 ply, but PL68 evals fewer nodes.
---------------------------------------------------
PL68: OPT=  -DUSEINT -DGDX -DHASGETTIMEOFDAY
 5.     52  583  1597711   e5f6  d5f6  h2h3  c6a5  e2e5  c7e5  c4e5 
-------------------------------------------------
PL69: OPT= -DUSEINT -DGDX -DHASGETTIMEOFDAY
 5.     47 1156  2585502   e5f6  d5f6  h2h3  c6a5  e2e5  c7e5  c4e5 

THE END