(;AW[pq]AW[qo]AW[qp]AW[oq]AB[pr]AB[qq]AB[rq]AB[rp]AW[ro]TR[rp]TR[ro]AP[goproblems]
(;W[or];B[qs]
(;W[sr];B[rr]
(;W[os];B[ps];W[rs]C[Ko - this is a good result, since before the marked exchange black was unconditionally alive.RIGHT]TR[rp]TR[ro])
(;W[sp];B[sq]))
(;W[os];B[sr]TR[sp]TR[rs]C[Miai for life.])
(;W[rr];B[sr]TR[sp]TR[rs]C[Miai for life.])
(;W[rs];B[rr]
(;W[os];B[ss])
(;W[sr];B[sq])
(;W[sp];B[ss]TR[sq]TR[ps]C[Miai for life.]))
(;W[sq];B[sr]TR[rs]TR[sp]C[Miai for life.])
(;W[sp];B[rr]C[Black is alive.]))
(;W[sp]
(;B[rr]C[]
(;W[sq];B[sr]
(;W[qs];B[rs];W[ps];B[or])
(;W[rs];B[qs])
(;W[or];B[qs]))
(;W[sr];B[sq]
(;W[rs];B[so])
(;W[qs];B[ss])
(;W[or];B[qs]))
(;W[or];B[qs])
(;W[qs];B[rs]
(;W[or];B[ps])
(;W[ps];B[or]))
(;W[rs]C[This works, but is not the best solution. If black can escape by crawling out to P2, he can play T2 instead of S2 and live.]))
(;B[rs]C[NOTTHIS]
(;W[sr];B[sq])
(;W[or];B[sr])
(;W[sq];B[sr])))
(;W[sr];B[rs]
(;W[rr];B[qr])
(;W[or];B[ps]))
(;W[rs];B[qs])
(;W[rr];B[sr]))