a: Important because they control the corner and have expansion potential along the upper side, and together with the “c” stones trap (and effectively capture) B“b”.
b: Marginally Important, because if it can escape that would neutralize the large White edge territory around it.
c: Important because together with the “a” stones they not only trap B“b” to take a large territory, but also project influence toward the open upper middle of the board.
d: Important because together with the “f” and “g” stones they trap (and effectively capture) the two W”e” stones, to both assure life and take a modestly large territory. Equally significant, they’re not enclosed and can therefore influence subsequent play nearby.
e: Important because their demise will ensure the connectivity and safety of the B“d” and “f” stones, to yield a large Black territory. But that’s not yet certain, so this situation will have to be watched closely until it’s definitively resolved.
f: Important because they are not only essential to the capture of the W”e” stones, but the weak link in that process. They also make an essential contribution to the W“h”, B“I” potential Seki below.
g: Important primarily because of their impact on both the fight against the B “d” stones and the W“h”, B“I” Seki to their right.
h: Important because of the very large number of points the difference between their life or death represents. At the moment they’re embedded in a Ko fight with the Black “h” stones which will probably result in Seki when the Ko is filled, but (although unlikely) that might conceivably change before the game’s end.
i: Important. Similar to the “h” stones because of the fight involving both.
j: Quite Important, because the Ko it’s involved in will determine whether or not the fight between the W”h” and B“j” groups becomes Seki.
k: Overwhelmingly Important. If this group should die the Seki to its left would collapse and then the W “h” stones would die as well, leading to White’s instant resignation.