(;AB[fq]AB[er]AB[es]AW[fr]AW[fs]AW[gq]AW[gp]AB[eq]AW[eo]AW[go]AW[cp]AW[br]AB[cr]AB[ds]AB[dq]AW[aq]AW[bp]AW[ar]AB[cs]AW[ao]AB[as]AW[cq]C[What should Black do?]AP[goproblems] (;B[gr]C[];W[hr] (;B[gs]C[Well done! Black now has two eyes and is therefore alive! :)RIGHT]) (;B[hs]C[Well done! Black now has two eyes and is therefore alive! :) (It's snapback - If White captures at G1 Black will G2)RIGHT]) (;B[bs];W[gs]C[White corrects his weakness and Black is left with one eye. One eyed groups are dead because they can be captured by surrounding and filling the eye.])) (;B[bs];W[hr]C[White corrects his weakness and Black is left with one eye. One eyed groups are dead because they can be captured by surrounding and filling the eye.]) (;B[gs];W[gr]C[White corrects his weakness and Black is left with one eye. One eyed groups are dead because they can be captured by surrounding and filling the eye.]))