All info from the
http://www.fogu.com/hm71. To win, you have to
Quote:
You will win the contest if you bring a Large Fish with at least 8 and a half red Size marks. If you have a Medium Fish, it need to be an S-Rank with 10 red-colored Size marks. A Medium Fish can not win if it has 9.5 Size marks, even if it also has 10 blue Quality and 10 green Freshness.
The festival can not be won if you bring a Small Fish, no matter what rank it is.
2. I suppose the best way (for me anyway) is to try them all ( winning festivals, Chen's shop in the Winter season, and at the bottom of the mine) But most preferably would be winning the festivals and acquiring it from Chen's shop. When Chen sells them, click >>>
http://www.fogu.com/hm7/basics/toolupgrades.php (scroll down)
3. You could only mine them in floors 25, 51 to 74, 225 and 250 to 254 (You will get at least one of Adamanitite in those floors 100%)
4.To unlock more food,
Quote:
# Get the Cafe and Diner unlocked in E.Town by collecting 10 or more sub-villagers. Once Luke (Diner) and Madelynn (Cafe) move in, continue to unlock sub-villagers. You will need to unlock 20 sub-villagers for the Cafe to upgrade, and 25 for the Diner.
# Give Luke and Madelynn cooking ingredients and in exchange they'll give you recipes for your kitchen. You just have to equip a food item and then tap on the restaurant owners. They will ask if you want to cook the item, and if they are successful they will create a new recipe for you. For example, if you give Luke an Egg then you may get the recipe for Egg Soup.
Hope this helps~