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Post by Steve Draper on Apr 6, 2014 17:32:16 GMT -8
noop appears to be (electively on any turn) legal as a move in Chinook. That makes the game a strong draw for either player by simply refusing to move a piece off the back row. Why allow that strategy in the game design??
Edit - strictly it's strongly a joint-loss, since the result is 0:0, but its a strategy against which a win is impossible, which was really my point.
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Post by maciej on Apr 7, 2014 1:14:10 GMT -8
noop appears to be (electively on any turn) legal as a move in Chinook. That makes the game a strong draw for either player by simply refusing to move a piece off the back row. Why allow that strategy in the game design?? Edit - strictly it's strongly a joint-loss, since the result is 0:0, but its a strategy against which a win is impossible, which was really my point. I have just checked that I have a file "chinookDisjunctive.gdl" (don't remember from). Can you check this out? At first glance I see: (<= (legal white noop)
(true (control black)))
(<= (legal black noop)
(true (control white)))And also: (<= (goal white 100)
(won white))
(<= (goal white 50)
(not (won white))
(not (won black)))
(<= (goal white 0)
(won black))
(<= (goal black 100)
(won black))
(<= (goal black 50)
(not (won white))
(not (won black)))
(<= (goal black 0)
(won white))Attachments:chinookDisjunctive.gdl (6.74 KB)
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Post by Steve Draper on Apr 7, 2014 5:12:10 GMT -8
That seems fine, but this is from the Tiltyard version:
(<= (legal ?player oddnoop)
(true (oddcontrol ?player)))
(<= (legal ?player evennoop)
(true (evencontrol ?player)))
and
(<= terminal
(true (oddcell ?x 8 white)))
(<= terminal
(true (evencell ?x 8 white)))
(<= terminal
(true (oddcell ?x 1 black)))
(<= terminal
(true (evencell ?x 1 black)))
(<= terminal
(true (oddstep 41)))
(<= terminal
(true (evenstep 41)))
So maybe this is just an issue with the Tiltyard version - which repository was the version you quoted from taken from?
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Post by maciej on Apr 7, 2014 16:01:06 GMT -8
Unfortunately, I don't remember. I must have downloaded it like 2 years ago.
I think this was in an announcement of a competition at games.stanford.edu available for download as an example of disjunctive/factorable game.
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