Fruit doesn't respond to simple UCI 'go' command

[Robert Ancell]

If the following is sent to Fruit:

uci
isready
ucinewgame
position startpos
go

Fruit does not calculate a move to make because it expects the go command to have arguments, e.g. 'go wtime 30000'. This is because it looks for a string starting with "go " instead of just "go". If that change is made it appears to just do an infinite search. I've attached a patch that allows the simple go command and searches to depth 5 if no arguments are passed to go.

Note this can be tested by just running Fuit and sending the 'go' command (it does not check the UCI state to disallow go commands).

[Robert Ancell (robert-ancell)]

This is fruit 2.1.dfsg-1 on Ubuntu Edgy.

[Robert Ancell (robert-ancell)]

The use case for this:
- A user making a chess interface would expect the simplest case to work
- The UCI specification though poorly worded in this section seems to state that any arguments to 'go' are optional.

[Jean-Baptiste Lallement (jibel)]

Thank you for your bug report. I'm confirming this issue for version 2.3 downloaded at http://www.fruitchess.com/ but it should be reported to the developers of the software.

[Oliver Korff (ok-linuxchess)]

The patch is included in the new debian version of fruit 2.1.dfsg-5.

Oliver