(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]PB[Black to play and rescue 4 stones]AB[rp][qp][pp][op][no][mo][nm][om][pm][qm]AW[rq][qq][pq][oq][np][nq][oo][on][qo][qn]
(;B[rn]C[Filling a white liberty is not fast enough.];W[ro];B[pn];W[po])
(;B[pn]C[Nor is pushing in here.];W[po]
(;B[ro];W[rn])
(;B[rn];W[ro]))
(;B[so]C[This is the move that connects or captures.]
(;W[ro]
;B[sm]C[This completes the connection.]
(;W[po];B[sp];W[sq];B[sn];W[rm];B[rl];W[rn];B[sl])
(;W[rm];B[rl];W[rn];B[sn];W[po];B[sp];W[sq];B[sl]))
(;W[rm]C[This does not work for White either.];B[pn];W[po];B[rn])
(;W[rn]C[If White tries to stop the connection...];B[rm];W[sn];B[pn];W[po]
;B[sm]C[.. White loses the liberty race.])))
