from: Go game guru - easy problem week 1 (http://gogameguru.com/weekly-go-problems-week-1/)
(;SZ[19]C[From go game guru weekly problem 1 - easy problem]AW[pq]AW[qq]AW[sq]AW[or]AW[qr]AW[sr]AW[os]AB[op]AB[pp]AB[qp]AB[rp]AB[sp]AB[mq]AB[oq]AB[nr]AB[qs]GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SO[http://gogameguru.com/]
(;B[rs];W[rr]
(;B[ns]C[RIGHT])
(;B[ps]LB[ns:A]C[Playing this move at A is usually better style because it leaves less bad aji (potential for bad things to happen) on the outside.RIGHT]))
(;B[rq];W[rr]
(;B[ns];W[rs]
(;B[ps];W[pr])
(;B[pr];W[ps]))
(;B[rs];W[ps])
(;B[ps];W[rs]))
(;B[ns];W[rs]
(;B[rq];W[rr]
(;B[ps];W[pr])
(;B[pr];W[ps]))
(;B[ps];W[pr])
(;B[pr];W[ps]))
(;B[ps];W[rs]))