CREATE TABLE "table1_29302711_12" (
  "rk" real,
  "name" text,
  "country" text,
  "matches_played" real,
  "matches_won" real,
  "points" real,
  "prize_money_usd" real
);

Question: how many matches did the player that played 23 matches win
SQL: SELECT MIN("matches_won") FROM "table1_29302711_12" WHERE "matches_played"=23;

Question: how many countries had 21 points
SQL: SELECT COUNT("country") FROM "table1_29302711_12" WHERE "points"=21;

Question: how much prize money (in USD) did bob lutz win
SQL: SELECT MAX("prize_money_usd") FROM "table1_29302711_12" WHERE "name"='Bob Lutz';

Question: how many matches did colin dibley win
SQL: SELECT "matches_won" FROM "table1_29302711_12" WHERE "name"='Colin Dibley';