#### CryptoKittiesCore

The main contract. Has kitty details, [[minting]], the ERC-721 interface, and a few other features.

[0x06012c8cf97bead5deae237070f9587f8e7a266d#code](https://etherscan.io/address/0x06012c8cf97bead5deae237070f9587f8e7a266d#code)

#### CryptoKittiesSalesAuction

Handles sales auctions of kitties. Kitties going on sale are transferred to this contract as part of the auction process.

[0xb1690c08e213a35ed9bab7b318de14420fb57d8c#code](https://etherscan.io/address/0xb1690c08e213a35ed9bab7b318de14420fb57d8c#code)

#### CryptoKittiesSiringAuction

Handles siring auctions of kitties. Kitties going up for siring are transferred to this contract as part of the auction process.

[0xc7af99fe5513eb6710e6d5f44f9989da40f27f26#code](https://etherscan.io/address/0xc7af99fe5513eb6710e6d5f44f9989da40f27f26#code)


#### GeneScience

Handles the gene mixing for [[CryptoKitties]]. The source code is not provided and this serves mainly as a reference to the contract address.

[0xf97e0a5b616dffc913e72455fde9ea8bbe946a2b#code](https://etherscan.io/address/0xf97e0a5b616dffc913e72455fde9ea8bbe946a2b#code)