(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[0.00] SO[http://gogameguru.com/]AW[pl][on][oo][np][pp][pq][pr]AB[qn][po][op][qp][oq][qq]C[Black to play. http://gogameguru.com/] (;B[nr] (;W[lq] (;B[or]C[Correct]) (;B[nq] ;W[mq] (;B[mr] ;W[lr] ;B[qr]C[It's also possible, but black can do better. ]) (;B[qr]C[It's also possible, but black can do better. ]))) (;W[nq] ;B[or] ;W[mr] ;B[qr]C[Correct. White needs one more move at M3. ]) (;W[pn] ;B[qo] (;W[lq] ;B[or]C[Correct]) (;W[nq] ;B[or] ;W[mr] ;B[qr]C[Correct. White needs one more move at M3. ])) (;W[mr] ;B[or]C[Correct] ;W[mq]C[Correct. Black has sente. ])) (;B[nq] ;W[mq] ;B[mp] ;W[nr] ;B[no] ;W[or] ;B[np] ;W[lq]C[It's bad for black. ]) (;B[or] ;W[pn] ;B[qo] ;W[nr] ;B[qr] ;W[nq] ;B[ps]C[It's possible, but black can do better. ]) (;B[qr] ;W[or] ;B[nq] ;W[mq]))