I’ll just throw here what this guy said:
Sometimes bots play keima instead of tiger. It has the advantage that when Black pushes A, White B, there is no cut at C. Probably situational as both moves exist.
Some humans studied White connecting 6 instead of blocking. So it might not be reliable.
When W crawls out the two stones, Black has to play 11. (If nobi A instead, White runs with the three centre stones as Black is alrady losing the corner semeai. If B, White has A, Black C, White D.)