(;SZ[19]AB[pb]AB[pc]AB[pd]AB[qd]AB[rd]AB[pa]AW[ob]AW[oc]AW[od]AW[oe]AW[pe]AW[qe]AW[re]AW[ra]AW[rc]AW[mb]AW[rg]LB[ra:1]LB[pa:2]LB[rc:3]C[White 1 and 3 is a wrong way to attack the carpenter's square. Black can live unconditionally.]GE[life and death]DI[1d]DP[15]SO[unkx80]CO[8]FF[4]GM[1]AP[Jago:Version 5.00]GN[goproblem633](;B[sb](;W[sc](;B[rb](;W[qb](;B[qc];W[sa](;B[qa];W[sd];B[rb]C[White cannot connect at A.RIGHT]LB[sb:A])(;B[sd];W[oa])(;B[rb];W[sb](;B[qa];W[sd])(;B[sd];W[se])))(;B[qa];W[sa](;B[qc];W[sd];B[rb]C[White cannot connect at A.RIGHT]LB[sb:A])(;B[sd];W[oa])(;B[rb];W[sb](;B[sd];W[se])(;B[qc];W[sd];B[rb];W[se])))(;B[sd];W[sa]))(;W[sd];B[qc];W[se];B[qa]C[RIGHT]))(;B[sd];W[rb])(;B[qb];W[sd])(;B[qc];W[rb])(;B[qa];W[rb]))(;W[rb];B[sc]C[Seki.RIGHT]))(;B[rb];W[sb](;B[qb];W[sd])(;B[sd];W[qb]))(;B[sc];W[sb])(;B[qb];W[sd])(;B[qc];W[rb])(;B[qa];W[rb])(;B[sd](;W[rb])(;W[sb];B[qb];W[rb])))