Interesting facts, questions and theories about LongJump stats

Hi, everyone! Sorry for being a bit late. Now I'm going to explain some things about sync and airtime.

The average sync is rarely calculated like "(Sync of 1st strafe+Sync of 2nd strafe+...+Sync of n strafe) / n". This is because of the airtime of each strafe. When we jump, we do some strafes longer than others. Look at the following example: http://imgur.com/c87tHpn

The average sync on this LJ should be (87+95)/2=91%, but as you see, it's 94%. But why is it 94 %? The reason is the airtime of the strafes. You can see that the 1st strafe has 7,7 % airtime, while the 2nd one has 92,2 %. This means that the average sync is closer to the sync of the strafe that is longer (=that has bigger airtime %). Here is the formula for calculating the average sync:

(Airtime of 1st strafe * sync of 1st strafe + Airtime of 2nd strafe * sync of 2nd strafe + ... + Airtime of n-th strafe * sync of n-th strafe). Let's try it: (7,7*87 + 92,2*95)/100 (1% = 1/100, this is the reason why we devide on 100). If you calculate it right, you'll get 94,289. That, of course, is not the sync you see on the picture, but as you know, it can't show 94,289, so it only shows 94 %. The airtime depends on the sync and the sync depends on the airtime. This is the reason why the formula uses both airtime and sync.

Let's give another example. If you do a LJ with 2 strafes (1st strafe - 50 sync, 2nd strafe - 100 sync) and each strafe is 50 % airtime, that means the average sync will be 75 % (because the strafes are, in some ways, equal). You just do this: (100+50)/2 and you get the average sync.

There's one more example with 7 strafes. I actually forgot to tell you that the number of strafes doesn't change anything and you'll see it's true: http://i.imgur.com/GibfKwF.jpg
Let's use the formula again. There's a bit more to calculate, but it's not a problem. As you see, the average sync is 74 %. Let's see what we get from the formula:

(19,4*76 + 15,2*100 + 15,2*80 + 15,3*72 + 12,4*85 + 12,5*55 + 9,7*33)/100 = 73,736 and the formula strikes again... But if we try to get the average sync like (76+100+80+72+85+55+33)/7, we get 71,571 which in fact is not the true average sync.

All in all, when all the strafes have the same airtime, then we can calculate the average sync by (1st strafe + 2nd strafe + ... + n-th strafe)/n. But when we have different airtime for each strafe, we can't calculate it like that and we have to use the formula I gave.

By the way, it's the same with every jump you know - CJ, DCJ, MCJ, HJ, BHOP LJ, etc...

im playing 4 years kz.. im sure that im not that bad when i duck to have 3 units difference.. i understand 0.5 or 1 but 3..
But we have the same way of thinking.. the way we are strafing is a key too.

nerv is exacly right imo. We can gain big speed while do Wide strafes but 'S 'cant go further than 'l '. And one more important thing is how fast move your mouse. Speed gaining / second is limited. So you have to move your mouse as fast as almost close to the limit

Well the "hidden factor" that makes his jump so good is the current. He has way less gain on his last strafe therefore equalizing his strafe trajectory way more efficiently then u did with the 18 gain on your last strafe. It can work miracles. Speed ain't everything and neither is airtime it's most important that your trajectory ends up as it should be ending therefore gaining a lot more units. Sync maxspeed is pretty much irrelevant specially in these 2,3,4,5 strafes jumps. Although the sync formula might be good it proves nothing really I never relied on sync as a stat unless I'm failing too much on one strafe. Write /beam for better understanding of what I'm talking and if you can compare your beam with his beam you will see one big difference.

The timing of pressing ctrl. Thats all..

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i have jump this in server nobkz 10aa