(;AB[ds]AB[er]AB[dq]TR[er]TR[dq]AB[cr]AB[br]AB[bq]AB[bp]AW[cq]AW[cp]AW[dp]AW[bo]AW[cn]AW[eq]AW[fq]AW[fr]AW[fs]AW[es]C[Just a fool's variation of a old problem]AP[goproblems]
(;B[as];W[dr];B[cs]C[RIGHT])
(;B[dr];W[bs];B[ap];W[ar])
(;B[ap]
(;W[ar]C[CHOICE];B[dr];W[bs])
(;W[dr]C[White mistake];B[ar])))