Womacka worked out the mate in only 22 moves from the lone King position, whereas Stockfish 9 takes 32 moves with best play. Apparently, Black made sub-par moves, then.

The mating pattern itself is aesthetically pleasing and piques my curiousity for similar games as well.

Although B+N+K vs K is one of the basic mates, it is challenging, so games like this gem are valuable. Thanks CG for including it!

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I learned the "W" method (or "Triangle method") from I.A. Horowitz books years ago by repeating his exact explanation on the board straight from the book every evening. Bruce Pandolfini has a good explanation in algebraic notation in his misnamed intermediate book "The ABCs of Chess." Here's a video that shows the "W" method: https://www.youtube.com/watch?v=hWw...

Then when I practiced by myself (moving for both sides) without a book (we didn't have computer chess applications to practice against back then), I started the lone king trapped in the wrong color corner and gradually forced it along the edge into the bishop's mating corner.

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Initial self-training position, Black to move. (This is slightly different than 5:20 on the video.)

First, I would practice against the lone king always attempting to return to the wrong color corner where it started. (The lone king always tries to move Left/Queenside or off-the-edge.) White must understand the role of the trailing bishop making a waiting move to pass the turn back to the lone king.

Next time, I would practice against the lone king racing in the other direction ahead of the knight, striving to get ahead and escape into the middle. (The lone king always tries to move Right/Kingside or off-the-edge.) The knight's leading role is more difficult to learn than the bishop, as the knight changes colors every time it moves.