(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]BP[Black to play]AB[rq][qq][pp][op][nq][nr][lq][pn]AW[rr][qr][pq][oq][pr][np][mp][qp]C[Black to play]
(;B[rp]C[This is the move that sets up
a "loose" ladder.];W[qo];B[ro];W[qn];B[qm]
(;W[rn]
;B[rm]C[There is no way White can escape from this - "If you don't know ladders don't play Go".])
(;W[po]
;B[oo]C[Pushing into Black's weaknesses does not help.]))
(;B[qo]C[This ladder simply fails.];W[rp];B[ro];W[sq]))
