(;AW[aq]AW[bq]AW[br]AW[cr]AW[dr]AW[ds]AB[er]AB[eq]AB[dq]AB[cq]AB[cp]AB[bp]C[If you can kill White's corner, do so. Otherwise, play P to punch him in the face. There are no ko threats on the board.]LB[ap:P]AB[gr]AP[goproblems]
(;B[bs];W[as];B[ar];W[cs]
(;B[es];W[as]C[I'll bet you wish you punched White in the face...])
(;B[ap];W[as]C[I'll bet you wish you punched White in the face...]))
(;B[ap];W[eo]TR[eo]C[You knocked a tooth out, which counts as White's move. Now, if you can kill White's corner, do so. Otherwise, play P to punch him in the face.]LB[es:P]
(;B[bs];W[as];B[ar]
(;W[do]C[White doesn't have any ko threats, so you chuckle as he plays this move.];B[as]C[Remember, kids, violence is not the answer (except in this problem)!RIGHT])
(;W[es]
(;B[as]C[Correct! White cannot escape.RIGHT])
(;B[fs];W[as]C[White takes back the ko and you have no threats...])))
(;B[es];W[bs]C[White blocks your punch and punches you in the face instead. Your tooth landed on the board, saving White's group. Tough luck, dude.]TR[bs])))