Public bug reported:
Binary package hint: gnuchess
gnuchess becomes confused about the move list available for "undo" when you
switch it in and out of "force" to manually make moves.
Attached is a minimal typescript demonstrating this problem: A board position
is set up, a move is forced, and gnuchess makes a move. At this point we
should be able to undo both moves, but gnuchess only permits undoing one ply.
This disrupts playing through variations in xboard, as when you Previous Move
in xboard, it sends "undo" to gnuchess, and going across a switch in "force"
results in the xboard position and gnuchess position diverging.
gnuchess version is 5.07.
** Affects: gnuchess (Ubuntu)
Importance: Undecided
Status: New
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undo move list is confused switching in and out of force
https://bugs.launchpad.net/bugs/288932
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