🚀 go-pugleaf

Hello gnuchessr's

Here are two positions that gnuchess, when told to evaluate to depth 6,
stops at depth 5.  This is either a buglet in printing (post-ing) the
evaluation, or in the actual evaluation -- I can't tell which.
Since it usually evaluates about 6500 nodes per second and in these
positions gives only about 800 nodes per second, I *think* it did
the evaluation for ply 6, but discarded it...

In position 1 it played the move from ply 5, but in position 2 it
"changed its mind" and played a different move.

I've looked at about 200 or so other postions in which gnuchess pl68 reported
results from ply 6 correctly (in that it post-ed the eval).  So this is
probably very rare.
These are with -DDEEPNULL and the "define" patch from Kong Sian implemented.


I couldn't find in the docs an address to which to report bugs.  Seems like
there used to be one...

Here are the positions (from the Bishop's opening):


Position #1:
---------------------------------

 1. e4 e5 2. Bc4 Bc5 3. Nc3 Nf6 4. d3 d6 5. f4 O-O 6. Nf3 Ng4 7. d4
 exd4 8. Nxd4 Re8 9. Qd3 Qf6 10. Nce2 Qh4+ 11. g3 Qh3

8 |r|n|b|/|r|/|k|/|
7 |p|p|p| |/|p|p|p|
6 | |/| |p| |/| |/|
5 |/| |b| |/| |/| |
4 | |/|B|N|P|P|n|/|
3 |/| |/|Q|/| |P|q|
2 |P|P|P|/|N|/| |P|
1 |R| |B| |K| |/|R|
   a b c d e f g h


---------------------------------
1 1
post
book
force
e2e4 e7e5 f1c4 f8c5 b1c3 g8f6 d2d3 d7d6 f2f4 e8g8 g1f3 f6g4 d3d4 e5d4 f3d4
f8e8 d1d3 d8f6 c3e2 f6h4 g2g3 h4h3
depth
6
bd
go
----------------------------------

Enter #moves #minutes: 
White 10:00  Black 10:00

Book used 0 of 250000 entries.
Warning can't find book.
Playing without hashfile

Your move is? 
Your move is? depth= 
Your move is? 

White 109:58  Black 109:59

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


Your move is? 
Move# 12    Target= 719776    Clock: 719876
 2.    -59   27    11020   e2c3  c5d4  d3d4  g4h2  d4d3 
 3&    -75   36    16076   e2c3  g4h2  d4b5 
 3.    -75   94    55541   e2c3  g4h2  d4b5 
 4&   -108  131    84212   e2c3  c5d4  d3d4  h3g2  h1g1  g2c2 
 4&    -85  167   117933   c4d5  h3g2  d3f3  g2f3  d4f3 
 4.    -85  334   234916   c4d5  h3g2  d3f3  g2f3  d4f3 
 5-   -208  388   374277   c4d5  c7c6  d5c4  h3g2  h1g1  g2e4  d3e3 
 5&   -144  458   567981   e2c3  g4h2  h1g1  b8c6  c1e3  c6d4  e3d4  c5d4 
                           d3d4 
 5&   -122  884  1107106   c1e3  h3g2  e1c1  g4e3  d3e3  e8e4  e3d3 
 5.   -122 1723  1711794   c1e3  h3g2  e1c1  g4e3  d3e3  e8e4  e3d3 
1. ... c1e3
Gen 3727384 Node 1711794 Tree 452 Eval 66074 Rate 993 EC 43740/19251 RS hi 0 lo 0 
Hin/Hout/Tcol/Coll/Fin/Fout = 3728/2297/0/0/0/0
My move is: c1e3



Position #2
-----------------------------------------------------

 1. e4 e5 2. Bc4 Bc5 3. Nc3 Nf6 4. d3 d6 5. f4 O-O 6. Nf3 Ng4 7. d4
 exd4 8. Nxd4 Re8 9. Qd3 Qh4+ 10. g3 Qh3 11. Bd2 c6

8 |r|n|b|/|r|/|k|/|
7 |p|p|/| |/|p|p|p|
6 | |/|p|p| |/| |/|
5 |/| |b| |/| |/| |
4 | |/|B|N|P|P|n|/|
3 |/| |N|Q|/| |P|q|
2 |P|P|P|B| |/| |P|
1 |R| |/| |K| |/|R|
   a b c d e f g h


------------------------------------------------------
1 1
post
book
force
e2e4 e7e5 f1c4 f8c5 b1c3 g8f6 d2d3 d7d6 f2f4 e8g8 g1f3 f6g4 d3d4 e5d4 f3d4
f8e8 d1d3 d8h4 g2g3 h4h3 c1d2 c7c6
depth
6
bd
go
------------------------------------------------------

Enter #moves #minutes: 
White 10:00  Black 10:00

Book used 0 of 250000 entries.
Warning can't find book.
Playing without hashfile

Your move is? 
Your move is? 
Your move is? depth= 
Your move is? 

White 109:59  Black 109:59

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


Your move is? 
Move# 12    Target= 719841    Clock: 719941
 2.    -35   22    11006   c3a4  h3g2  e1c1  c5d4  d3d4  e8e4 
 3-   -159   28    14141   c3a4  b7b5  b2b4  c5b4  d4c6  b5c4  c6b8 
 3&    -92   70    35411   d2e3  d6d5  c4b3  g4h2  e3f2  d5e4  c3e4 
 3&    -71  100    54346   a2a3  d6d5  c4b3  c5d4  d3d4  g4h2  d4f2 
 3&    -57  143    76008   c4b3  d6d5  d4e2 
 3.    -57  146    78789   c4b3  d6d5  d4e2 
 4&    -73  190   108149   c4b3  d6d5  a2a3  c5d4  d3d4  g4h2 
 4.    -73  390   223467   c4b3  d6d5  a2a3  c5d4  d3d4  g4h2 
 5&    -79  503   289284   c4b3  d6d5  a2a3  g4h2  e1c1  c5d4  d3d4  h3g3 
                           e4d5 
 5.    -79  967   751598   c4b3  d6d5  a2a3  g4h2  e1c1  c5d4  d3d4  h3g3 
                           e4d5 
1. ... c4b3
Gen 1509182 Node 751598 Tree 443 Eval 40728 Rate 777 EC 25675/11783 RS hi 0 lo 0 
Hin/Hout/Tcol/Coll/Fin/Fout = 2484/1581/0/0/0/0
My move is: c4b3
---------------------------------------------