(;AW[ss]AW[rr]AW[qr]AW[pr]AW[or]AW[oq]AW[op]AB[oo]AB[on]AB[pp]AB[pq]AB[qq]AB[rq]AB[sq]AB[sr]AW[po]AW[qo]AW[pn]AW[rn]AW[sn]AW[rp]AB[pm]AB[qm]AB[qn]AB[rm]AB[sm]AP[goproblems]
(;B[rs];W[sp]
(;B[qp];W[ss])
(;B[ro];W[so]TR[qp]C[Black cannot play here due to shortage of liberties])
(;B[so];W[ro]C[One eye versus no eye. White wins.])
(;B[ss];W[qs]))
(;B[sp]
(;W[ro]C[CHOICE]
(;B[so];W[qp])
(;B[qp];W[so])
(;B[rs]C[RIGHT];W[qs]
(;B[so];W[ss];B[qp]C[RIGHT])
(;B[qp];W[ss];B[so]C[RIGHT])))
(;W[rs]
(;B[qp];W[so])
(;B[ro];W[so];B[ro]C[RIGHT])))
(;B[qp];W[sp])
(;B[so];W[ro]
(;B[sp];W[qp])
(;B[qp];W[sp])
(;B[rs];W[sp]C[One eye versus false eye. White wins.]))
(;B[ro];W[so]
(;B[rs];W[sp]TR[qp]C[Black cannot play R4 due to a shortage of liberties.])
(;B[sp];W[qp])
(;B[qp];W[sp])))