(;GM[1] FF[4] AP[Hibiscus:2.1] SZ[19] ST[3] ;C[Black played A in response to White's marked move. How to continue with White?] PL[W] LB[yy:0][qm:A][yy:0]TR[po]AB[mq][qm][qp] AW[oq][po] ;W[qo] ;B[ro] (;W[no] ;B[rq] ;W[lp] C[RIGHT This result is generally slightly better for White.] )(;W[rn] ;B[rp] ;W[qn] (;B[pp] ;W[op] ;B[oo] C[Please play at A.] LB[oo:8][on:A];W[on] ;B[no] (;W[qr] ;B[pq] ;W[pr] ;B[or] ;W[nr] ;B[nq] ;W[os] ;B[np] ;W[or] ;B[rm] ;W[sn] ;B[pm] ;W[pn] ;B[nm] C[You fell for the so called 19-point trick play. This result is very favourable for Black because of his incredible thickness and sente, besides White only has 19 point of territory.] )(;W[pq] ;B[qr] C[White is in big trouble.] ))(;B[pq] ;W[pp] (;B[qr] ;W[pr] ;B[qq] ;W[or] ;B[sr] ;W[np] )(;B[pr] ;W[or] ;B[rr] ;W[np] )))(;W[pp] ;B[rp] C[RIGHT White can now make a pincer on the lower side. A white position in the lower left is necessary when playing this way.] ))