i'd like to know according to opening book, there is "fact" and "prob" on the tree column. Assuming that on move 7, there is 4 lines available that shows:

7.Qb6 fact: 27 ( this line is use for tournament) prob: 66.0

7.Nbd7 fact: -27 ( this line is not use for tournament) prob: 1.1

7.Be7 fact: -23 ( this line is not use for tournament) prob: 0

7.B5 fact: 49 (this line is use for tournament) prob: 33.0

Ok, do i choose a line that has the greater "fact"? In this case, "B5"?. However it has a less prob than Qb6. Im kinda confused. Btw, all these lines has yellow asterisk besides it. What if some are red asterisk? How do i know which one is the stronger line? Can somebody pls share some light on this. Thanks alot.

7.Qb6 fact: 27 ( this line is use for tournament) prob: 66.0

7.Nbd7 fact: -27 ( this line is not use for tournament) prob: 1.1

7.Be7 fact: -23 ( this line is not use for tournament) prob: 0

7.B5 fact: 49 (this line is use for tournament) prob: 33.0

Ok, do i choose a line that has the greater "fact"? In this case, "B5"?. However it has a less prob than Qb6. Im kinda confused. Btw, all these lines has yellow asterisk besides it. What if some are red asterisk? How do i know which one is the stronger line? Can somebody pls share some light on this. Thanks alot.

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