What size is the field? 6 6

 ABCDEF
A
B    
C
D 
E
F

Where do you want to probe?
B C

Sorry, but you are only 1 step away!

 ABCDEF
A
B    
C X
D 
E
F

Where do you want to probe? B B

Congratulation?
 ABCDEF
A
B *   
C X 
D 
E
F