So you heard: 'If you are a practicing Hi-Lo player and have diligently committed to memory 150 to 200 index numbers, you may be interested to learn that for this particular game and style of play, you might as well throw 90% of your numbers away and keep just the “Illustrious 18.” On the other hand, if you have just mastered true count and were about to embark upon your study of the index-number matrix, I have saved you a great deal of work. Learn the plays in the chart and forget about the rest. You can trust me that you won’t be missing much.' Bravos! Wouldn't it be nice if my chemistry teacher had told me that I only need to know 18 important elements of the periodic tables and throw the rest away?