data:image/png;base64,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

X

X's turn?X

1

1

X

I'm kind of bummed that I didn't find a beautiful one-line solution using FIND FIRST, but it just gives the value it finds, not the position in the list, which is what we need to find the line endpoints in WIN LINES. So it's a plain old fashioned FOR loop.

1datamapmany1data lists

110idata:image/png;base64,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falseO,X,O,X,X,O,X,O,X-100,50100,50-100,0100,0-100,-50100,-50-50,100-50,-1000,1000,-10050,10050,-100-100,100100,-100-100,-100100,100