(;AB[qr]AW[ps]AW[or]AW[pq]AW[oq]AB[os]AB[ns]AB[nr]AB[nq]AW[sp]AW[rp]AW[ro]AW[rn]AW[qn]AW[pn]AW[po]AW[op]AB[np]AB[oo]AB[on]AB[om]AB[qm]AB[pm]AB[rm]AB[sm]AB[sn]AB[so]C[White to deal with the triangled stone in the most effective way.]TR[qr]AP[goproblems]
(;W[pr];B[qq]
(;W[qp];B[qs]
(;W[pp];B[rq])
(;W[rq];B[rr];W[pp];B[sr]C[gote seki (after s1 or t1)])
(;W[rr];B[rq]
(;W[pp];B[sq])
(;W[sq];B[pp]))
(;W[sr];B[rq]
(;W[sq];B[pp])
(;W[pp];B[sq])))
(;W[qs];B[rs];W[pp];B[sr]
(;W[qp];B[rq])
(;W[rq];B[rr]C[seki]))
(;W[rq];B[qp]
(;W[qs];B[pp])
(;W[rr];B[pp])
(;W[pp];B[rr]
(;W[sr];B[rs]C[seki])
(;W[qs];B[sr]C[seki])
(;W[rs];B[sr]C[seki])))
(;W[rr];B[qs]
(;W[pp];B[rq]
(;W[qp];B[sq])
(;W[sq];B[rs]
(;W[qp];B[sr])
(;W[sr];B[qp]C[seki])
(;W[ss];B[sr])))
(;W[qp];B[pp])
(;W[rq];B[pp]))
(;W[rs];B[qs];W[pp];B[rr];W[qp];B[sq])
(;W[sr];B[qp];W[pp];B[rr]
(;W[qs];B[rs]C[seki])
(;W[rs];B[qs]
(;W[rq];B[ss]C[ko])
(;W[qo];B[ss]C[ko]))))
(;W[rr];B[qq]
(;W[rq];B[qp]
(;W[pp];B[pr]
(;W[qs];B[rs])
(;W[rs];B[qs]))
(;W[qs];B[pr];W[rs];B[pp])
(;W[rs];B[qs];W[pp];B[pr]))
(;W[qp];B[pr]
(;W[pp];B[rq];W[sr];B[rs];W[sq];B[qs])
(;W[qs];B[rs])))
(;W[qq];B[pr];W[rr];B[qs];W[rs];B[ps]C[White gives away a little to retain the corner and sente. RIGHT])
(;W[rq];B[qq];W[pr];B[qs];W[pp];B[rr];W[qp];B[sr]C[gote seki (after s1 or t1)])
(;W[qp];B[qq];W[pr];B[qs];W[pp];B[rq]))