(;AB[sd]AB[rd]AB[qd]AB[pd]AB[oc]AB[ob]AB[oa]AB[mc]AW[od]AW[oe]AW[pe]AW[re]AW[rf]AW[pc]AW[pb]AW[pa]AW[qa]AW[qc]AW[rb]AB[rc]AB[sb]AB[sa]LB[mh:alive]LB[oh:ko]LB[qh:dead]C[Black's turn. What is the status of his stones?]TR[pd]TR[qd]TR[rd]TR[rc]TR[sd]TR[sb]TR[sa]AP[goproblems]
(;B[oh];W[oi]C[show it then];B[ra];W[sc]
(;B[ra];W[sa];B[sb]C[correct, a step ko!
The proverb says 'strange things happen at the 1-2 point'RIGHT])
(;B[sb];W[ra]C[black dies])
(;B[sa];W[sb]C[oops]))
(;B[mh];W[mi]C[show it then]
(;B[sc];W[qe];B[ra];W[se]C[oops])
(;B[ra];W[sc]
(;B[sb];W[ra]C[black dies])
(;B[ra];W[sa];B[sb]C[that's a ko])
(;B[sa];W[sb]C[the black stones are dead])))
(;B[qh];W[qe]C[check again])
(;B[lg]C[NOTTHIS])
(;B[mg]C[NOTTHIS])
(;B[ng]C[NOTTHIS])
(;B[og]C[NOTTHIS])
(;B[pg]C[NOTTHIS])
(;B[qg]C[NOTTHIS])
(;B[rg]C[NOTTHIS])
(;B[rh]C[NOTTHIS])
(;B[ri]C[NOTTHIS])
(;B[qi]C[NOTTHIS])
(;B[pi]C[NOTTHIS])
(;B[oi]C[NOTTHIS])
(;B[ni]C[NOTTHIS])
(;B[mi]C[NOTTHIS])
(;B[li]C[NOTTHIS])
(;B[lh]C[NOTTHIS])
(;B[nh]C[NOTTHIS])
(;B[ph]C[NOTTHIS])
(;B[qe]C[NOTTHIS])
(;B[se]C[NOTTHIS])
(;B[sc]C[NOTTHIS])
(;B[ra]C[NOTTHIS]))