caranthir: I see now that the problem was apparently moved to the same direction (that I just modified) earlier times, and then those variations were removed. Sorry. Anyway, I tried to generally use the best moves here (for what is required from the player). For instance, in case of B4C5A4B1, now C6 instead of C7 would be playable too, but C7 is still clearly superior generally speaking (living and capturing stuff, not knowing or caring what's outside the field of view of the problem).
caranthir: I added also the following: S4R5T5S1T4R7S7. This is a bit more "open", but the player gets to see this variation only if they play T5 instead of T4.
posetcay: I think this is not a very good problem, it is too open after S4-R5. Maybe add more stones outside.
caranthir: Is it really too open? We get to live anyway, if so desired, in case of B4C5A4. Now if B1, then C7 catches everything. ----- I added this as an alternative.
Farkas: best solution:
after Bb16 Wc15 Ba16 Wb19, Black c13 captures the 4 stones. Followups: Wb13 Bb14 Wc14 Bd14 Wa14 Ba15 Wb14 Bb12 Or if Wc14 first, then Bd14 Wb13 Bb14 Wa14 Ba15 Wb14 Bb12
d4rkm4tter: The problem is too open... I changed the opponent's path.
Is it really too open? We get to live anyway, if so desired, in case of B4 C5 A4. Now if B1, then C7 catches everything. ----- I added this as an alternative.