using machine language on object or "situation" classification

What is a good video to look at regarding detection of objects?

I'd also like a good video for detecting the state of a board game. For example, if all the pieces on the board are in a particular state, what would be a favorable next move for the AI? Or at the very least, can we detect how well a certain players position is in the game?

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I would choose YOLO (search the internet for YOLO and image detection) to find out positions of all pieces relative to the board. MPS supports YOLO, I believe, though I have not used it by myself.

Depending on the type of game you are targeting you may also set up a pattern recognition graph for all possible games states. But in this case the number of states should be limited.

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I would choose YOLO (search the internet for YOLO and image detection) to find out positions of all pieces relative to the board. MPS supports YOLO, I believe, though I have not used it by myself.

Depending on the type of game you are targeting you may also set up a pattern recognition graph for all possible games states. But in this case the number of states should be limited.
Object detection related videos can be found in WWDC2019: https://developer.apple.com/videos/play/wwdc2019/424/

There is also an upcoming session in WWDC2020 that you may find it relevant:
Vision & Action: https://developer.apple.com/videos/play/wwdc2020/10099
(The corresponding Article & SampleCode: https://developer.apple.com/documentation/vision/building_a_feature-rich_app_for_sports_analysis)