Not that it matters too much, but I saw some artwork describing this year’s US Open as the “120th Anniversary” of the event. But if the event occurs every year, wouldn’t this be the 119th anniversary? It seems the 2nd annual event would be the 1st anniversary, and so on.
1 year after my wedding was my first anniversary. So, no.
You’re making his point. It’s 119 years after the first Western Open, so if we’re calling that the first US Open, yes it’s the 119th anniversary.
1 year after our wedding was our 1st anniversary, so YES.
Yep. Oops. I didn’t express my thought well. No the 120th US Open would not be the 120th anniversary.
Going too fast in my answer
As I always say when I do that, “I’m not that good with numbers”. 
Like Allen, I’m an accountant. I won’t speak for him, but I’m a lot better when I use Excel.
This is a classic “off by one” mistake familiar to every computer scientist. The classic version is called the “fence post problem” - if you build a fence 10 feet long, how many fence posts do you need? We will wait while the accountants fire up Excel.
Not to be confused with the more subtle: if your image is 256x256, how wide is it?
You are apparently assuming that the fence posts are 1 foot apart. If you had said “10 sections” instead of “10 feet”, your point would be clearer.
That’s why the world ought to count starting with 0 instead of 1. C programmers know this. If you dimension an array with 10 elements, subscripts (indices) 0 through 9 (rather than 1 through 10) are available.
How many fingers does a C programmer have? The classic answer is “Nine: 0,1,2,3,4,5,6,7,8,9.” A better (but lacking in humor) answer is “a C programmer has ten fingers, numbered 0 through 9”.
Bill Smythe
Yes, but do you know how to count to 60 on your hands using finger segments?
Not presently, but if I had 60 fingers, it would be easy.
Bill Smythe
On your left hand, use your left thumb to point to the tip of your left index finger - 1, middle segment of your left index finger, 2 - bottom of your left index finger, 3, move to tip of middle finger, 4, middle of middle finger, 5, bottom of middle finger, 6, and so on for the next two fingers, counting to 12. When done, hold up one finger on your right hand, and then repeat the process 4 more times. 5 x 12 = 60. It is speculated that when the Babylonians used base 60 arithmetic, that this is how they counted. 60 is a useful number because it is evenly divisible by common fractions - 1, 2, 3, 4, 5, 6, 10, 12, 15, 20. This is the reason we have 12 hour clocks, 360 degree circles, 360 days in a year (with a 5 day holiday) etc.
That would depend whether or not you left the mower running while cleaning the discharge chute…
Even if you allow only two positions per finger (and per thumb), extended or not extended, you can count all the way up to 1023 (starting with 0) without running out of combinations. This is quite a bit larger than 60.
Just think of each finger as being a binary digit (bit), having values of 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 respectively if extended, or 0 if not extended.
Bill Smythe
How primitive - why restrict yourself to binary?
I agree about the convenience of using 60 (or 360, for that matter) for division by common integers. But that last claim can’t be right – the reason we usually have 365 days in a year is simply that it takes about 365 rotations of the Earth to complete one revolution around the sun. We may choose arbitrary systems of measurement and description for convenience, but we don’t directly choose the empirical facts about the solar system. That said, I actually like the idea of thirteen 28-day months (364 days) with a one-day holiday, or a two-day holiday in leap years, so that each date falls on the same day of the week in every month for the whole year.
Returning to the original post, though, if anyone knows who did the mistaken artwork for US Chess, or knows who will do it next year, please feel free to tell them about the error.
oh, they already know, rest assured.