(; GM[1] SZ[19] AW[cd][df][cp][ep][qp][qo][ql] AB[ec][jc][pd][kq][qq][rq][pp][op] C[Problem 100. White to play. There are a lot of good points that White wants to play. However, one of these points takes precedence over all the others. Where should White play ? ] (;W[qi] LB[qj:A] TE[2] C[Correct Answer. The extension of White 1 is the most important point on the board for White. With this move, all of her groups are strong. If Black is allowed to make the checking extension to A, the game would become difficult for White. <= ] ) (;W[cj] C[Failure. White gets a nice position on the left if he plays 1, but ... ] ;B[qj] C[... the checking extension of Black 2 leaves the white stones vulnerable and White must defend them. But Black will make profit by attacking them. ] ) (;W[qf] C[Failure. If White 1 here, ... ] ;B[qj] C[... Black 2 is still a severe move. <= ] ) )