3 x 3 grid
Recall that we found only 1 winning position in a 3 x 3 grid, the centre pebble.

What students worked out4
Student 1
There is only the center pebble that is the only winning point
Student 13
Yes sir
Student 7
yes sir
Student 5
yes
Recall that we found only 1 winning position in a 3 x 3 grid, the centre pebble.

Student 1
There is only the center pebble that is the only winning point
Student 13
Yes sir
Student 7
yes sir
Student 5
yes