AlGebr:
E19-D17-D18-F17-F18 (marked correct) is a ko, but the subscript says to live (no ko). Please correct.

Fupfv:
Your solutions (Q3 P2 P1 O2 O3 Q2 M2 L2 M1 or Q3 P2 P1 O2 O3 Q2 N1) are wrong. Q3 P2 P1 O1 is ko. Or even better Q3 M2 is dead without ko. Just lost golden tsumego points besause of this.

Daviid:
Looks like Black can kill by playing the hane on the edge rather than pushing.