Cat's favorite food ranked with an Elo rating system

What is ELO ratings and how it applies to our cat food

The Elo rating system is a method for calculating the relative skill levels of players in competitor-versus-competitor games such as chess. It is named after its creator Arpad Elo, a Hungarian-born American physics professor. The difference in the ratings between two players serves as a predictor of the outcome of a match. Two players with equal ratings who play against each other are expected to score an equal number of wins.

Every morning and night my wife and I give our cat (Sterling) the option of two bowls of different food. The outcome determines the winner; the first bowl Sterling finishes is the victor, the other one is the loser. In the case of a tie, he consumes an equal amount of food.


Used in video games, association football, Chess tournament, gridiron football, basketball, Major League Baseball, competitive programming, esports, and other games.

Method of calculation

A player’s Elo rating is represented by a number which increases or decreases based upon the outcome of games between rated players. After every game, the winning player takes points from the losing one. The difference between the ratings of the winner and loser determines the total number of points gained or lost after a game.


Rn = Ro + K √ó (W – We)

We = 1 / (10(-dr/400) + 1)


Rn is the new rating.

Ro is the old (pre-match) rating.

K is the weight constant

W is the result of the game (1 for a win, 0.5 for a draw, and 0 for a loss).

We is the expected result (win expectancy)

dr is the difference in ratings.


Dry Food

Solid Gold Katz-N-Flocken Holistic Dry Cat Food, Lamb

Purina Cat Chow

Blue Buffalo Wilderness Duck

Wellness CORE Air Dried Natural Grain Free Indoor Recipe

Natural Balance original ultra Whole Body Health

Nature’s Variety Instinct Grain-Free

Natural balance Wild pursuit trout

Wellness Trufood indoor

merrick purrfect bistro chicken

Natures variety instinct ultimate protein

Blue Buffalo Indoor Health Chicken & Brown Rice

Nature’s Variety Instinct Grain-Free Chicken Meal

The Honest Kitchen Grace turkey cat food

The Honest Kitchen Prowl chicken cat food

Halo Vigor Chicken, Turkey & Whitefish Grain Free Cat Food

Blue Buffalo Wilderness Chicken Recipe Adult Cat Food

Halo Spot’s Stew Grain Free Hearty Chicken

Dry food Elo rating

Dry food Price per lbs , % of protein

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Wet food

Fancy feast Chicken

Fancy feast Beef

Blue Buffalo Wilderness Duck

Nutro soft loaf Duck

Merrick Purrfect Bistro Duck Pate

Soulistic Chicken Dinner

Blue Buffalo Basics duck Limited-Ingredient

Nature’s Variety Instinct Grain-Free

Wellness Divine Duos With Chicken Pate & Diced Duck

Wet food elo rating

Wet food Price per lbs and % of protein

Buy it today

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