Perform alpha-beta pruning on the tic-tac-toe search of Figures 4.23, 4.24, and 4.25. How many leaf nodes

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Perform alpha-beta pruning on the tic-tac-toe search of Figures 4.23, 4.24, and 4.25. How many leaf nodes can be eliminated in each case?

Figures 4.23

6-5=1 5-5-0 6-5=1 5-5-0 4-5=-1 # Start node MAX's move   OX 5-4-1 6-4=2  5-6 -1 6-6-0 5-6=-1 6-6=0 4-6=-2

Figures 4.24,

4-2-2 3-2-1 5-2=3 3-2-1 4-2-2 4-2=2 ## 4-3-1 3-3-0 5-3-2 3-3-0 4-3=1 4-3=1 MAX's move ### 4-2=2 4-2=2 5-2=3

Figures 4.25

MAX's move  2-1=1 3-1-2 2-1=1 3-1 = 2 -00 3-2-1 2-2-0 3-2=1 XT Start node  -00 # 2-2-0 2-2-0 3-2-1 2-1=1

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