Will this be a "peoples choice" kind of competition, or will there be some kind of rating system like a 1-5 ? Location plays a role as well as different parts of the US have regional differences. At larger contests (meaning a lot of sampling) cooks basically try not to offend the tasters by making something way too spicy, or have a funny texture, be too watery, or use some non-typical ingredient like chopped celery, or kernels of corn. Also, if it's allowed have some condiments on the side for example Frito corn chips, grated cheese, flour tortillas cut into wedges, etc.
Here is good starting point recipe that you can fine-tune to your liking:
This is a modified version of Margaret Nadeau's Sahara Chili which gave her wins in 2005 and 2009 at the CASI Terilingua International Chili Championship. Modified in that her
RECIPE calls for specific brands of chile powders which are hard to source unless you order online. One of the chili competitors tricks is to use more than one spice "dumps" during the cooking. This keeps the flavors sharp until the very end. Step 3 is the 1st dump, and Step 4 is the second dump, they are separated by 1 hour.
Sahara Chili
STEP 1:
2 lbs. Course ground beef (chili grind)
1 TBS Cooking oil
1 TBS Granulated onion powder
Add ingredients together and lightly brown meat
STEP 2:
Add:
1 can (8oz) Tomato Sauce
1can Beef Broth
Cook for 30 minutes
STEP 3:
Add:
1 TBS Light Chili Powder
2 TBS Dark Chili Powder
1 tsp Garlic powder
1/2 tsp Salt
1/2 TBS Cumin
1/2 tsp Cayenne
1/2 tsp Black Pepper
1 tsp Chicken Granules or 1 cube
1 tsp Beef Granules or 1 cube
Cook for 1 hour
Step 4:
Add:
1 TBS Light Chili Powder
1 TBS Dark Chili Powder
1 tsp Paprika
1/2 TBS Cumin
2 dashes of Hot Sauce
Cayenne pepper to taste (should not be more than 1/8 tsp.)
1 pack Sazon' Goya
Leave covered and simmer for 30 minutes. During this time if liquid is needed you may use more beef broth also salt and heat can be adjusted to your liking.