Middle Game: Section 1. Pr. 12. B 2 play. How can B link up his stones on the right 2 the ones in the corner? Don't let this situation turn into a ko.
(;AB[dp]AB[dq]AB[dn]AB[fp]AB[fr]AB[hq]AW[er]AW[fq]AW[gp]AW[ho]AW[fo]AW[kp]AW[lq]AP[goproblems]
(;B[eq];W[ep];B[gr]LB[eq:1]LB[ep:2]LB[gr:3]C[Correct answer. B 1 enables B 2 link up without any problems.RIGHT])
(;B[gq];W[ep];B[eq];W[gr]LB[gq:1]LB[ep:2]LB[eq:3]LB[gr:4]C[Wrong answer. If B plays from the other side, W gets a ko by playing 2 & 4.]))