The NHL publishes a number of score sheets all with significantly different information. Using this data I construct my own statistics, one statistic I use is shots against and another is goals against. Shots against are not recorded by the NHL so I need to infer who the shots occur to (I also need to infer penalties, by following the basic penalty rules). Goals against are recorded for each player, people often look at an individuals plus minus. Many, like me, prefer scoring rates per situation (even strength, power-play, penalty kill).
So I was sorting through my initial results and noticed a rather confusing situation, D. Markov has received a goal against without ever having a shot against. From a game perspective this is impossible as goals cannot occur without shots, but when you think how I collect data shot against are determined by NHL score sheet people, where shots against are determined by the NHL time sheets, you can see where the problems could develop.
This situation occurred in
However, Markov and Lidstrom are having an amazing start to their season. Lidstrom has no goals against (should be one though), and Markov has just the one I mentioned. Both average less than one expected goal against per hour in both even strength and short handed situations.
I’m working on complicated matrix system for determining player skill and it’s not as easy as I originally expected, so there aren’t many “math” articles recently. I’ve also been busy with school work.