1 1 2 3 1 2 1 1 1 1 2 2 1 2 1 1 1 1 1 2
Yes No Hint: The first enquiry: $a$ can decrease grid $(1, 2)$'s number by $1$. No matter what $b$ operate next, there is always one grid with number $1$ remaining . So, $a$ wins. The second enquiry: No matter what $a$ operate, there is always one grid with number $1$ remaining. So, $b$ wins.