🚀 go-pugleaf

Recently I was playing a five minute game against gnuchess 4pl60 with
xboard 2.1pl9 on a Decstation 5000 running Ultrix. After my 11th move,
d1d6, gnuchess spent so much time on it's reply it's flag fell, whereupon
it played f6g4 despite having f6e4 available. I made a few negative time
moves just to see how gnuchess would respond.

The gnuchess printout is included below. Has anyone else seen problems like
this?

gnuchess 4p60 game
       score  depth   nodes  time                score  depth   nodes  time
 e2e4      0      0       0     1          c7c5    -10    Book      0     0
 g1f3      0      0       0     2          d7d6    -30    Book      0     0
 d2d4      0      0       0     2          c5d4    -30    Book      0     0
 f3d4      0      0       0     1          g8f6    -35    Book      0     0
 b1c3      0      0       0     2          a7a6    -29    Book      0     0
 f2f4      0      0       0     4          e7e6    -41    Book      0     0
 c1e3      0      0       0    11          e6e5    -30      4   28258     7
 f4e5      0      0       0     5          d6e5      0      4   32492     7
 d4f5      0      0       0     6          d8a5     -6      5  281424    57
 f5d6      0      0       0    30          f8d6     49      5   63854    17
 d1d6      0      0       0    48          f6g4      0      0       0     0
 f1b5      0      0       0     0          a6b5      0      0       0     0
 e3b6      0      0       0     0          f7f6      0      0       0     0
 d6d8      0      0       0     0          g4f2      0      0       0     0