How does SN2 scoring really work?

What we know:
MFC = 1,000,000
PFC = 1,000,000 minus (number of Perfects * 10)

Is the rest just a percentage? Is Marvelous a weight of 100, Perfect a weight of 99, and Great a weight of 49, like I've read in many places? What do O.K's and N.G's do to the score?

Your feedback may help get SN2 scoring into StepMania (SSC)...

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IIRC, based on ex score:
Marvellous, OK: 2
Perfect: 2 minus 10 from actual score
Great: 1 minus 10 from actual score
The rest: 0

I have analyzed part of Dr.D's Second Heaven PFC video, and have found that....

Marvelous scores alternate between 2070 and 2080 points (2070 first). I found an OK for 2070 points. I found a Perfect worth 2070 points, so I assume perfects alternate with 2060?

Is the ones digit of SN2 scoring always a 0?

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If i remember well, there were a full description of the sccoring system somewhere on the website (and on other too). But i know that i can't find it (because i spent 20min the other day to find the grading systeme on SN2 and couldn't fid it).

It should be something like this :
y = Number of arrows + numbers of OK i the chart
Marvelous = 1.000.000 / y
Perfect = (1.000.000 / y) - 10
Great = 1.000.000 / (y*2)
Other = 0

I'm sure for the marvelous and the perfect but not for the great. I can't remember if it's hafl point of the marvelous of the perfect.

Well i'm sure someone will post the good stuff (if also someone knows how to find the grading system on SN2... i remember a japanease page where it was on it for all the difficulties).

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Let N = number of steps in the song + number of freeze arrows + number of shock arrows
Let X = 1,000,000 (one million) / N

Each Marvelous is worth X points.
Each Perfect is worth X - 10 points
Each Great is worth 0.5X - 10 points. (***not half a Perfect! It's slightly less than half of a Perfect.)
Each O.K. is worth the same as a Marvelous.
Everything else is worth 0.

The game will round down everything past the tens digit, so a theoretical score of 123,456.789 is displayed as 123,450.

A score of 1,000,000 would be a MFC (maximum score on every step).
A score of 990,000+ is a AAA.
A score of 950,000+ is a AA.
A score of 900,000+ is an A.
A score of 800,000+ is a B.
A score of 700,000+ is a C.
Anything below that is a D.
Obviously, a fail is an E, and does not correspond to any score.

This is only true for Heavy and Challenge, as it's more lenient on lower difficulties, as stated at BEMANIwiki.

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mmm... I'm playing with this setup right now and I feel like something's wrong. I'm getting 960,000+ scores on songs which I don't think I should be. I also think I once got a GFC with a higher score than if it had been a PFC, even discarding the greats.

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Can you tell me just how many Marvelouses, Perfects, Greats, etc. you got?
I've done many calculations using what I posted and compared it to people's scores, and they all turned out right (I was able to calculate Valkyrie Dimension's max combo before anyone passed it).

Also, your last statement makes no sense. How can you tell what the score is "if it had been a PFC"?
(Also, it is technically possible to get a GFC with a higher score than a PFC. Max 300 with all Marvelouses and 1 Great gives a 999,110 score. Max 300 PFC with 90 perfects gives a 999,100 score.)

yeah, it makes sense if you thought that PFC = 1,000,000 minus 100 per perfect rofl.

i figured out it's -10, the new build makes more sense but I still feel like my scores are too high.

example:
I played Mei Heavy and got:
391 marvelous
176 perfect
46 great
1 good
13 OK
2 miss
total score: 955,920
(although jumps count as 1 step, jump holds count as two OKs/two NGs. I don't know how to fix that code-side)

Feels a little high to me.

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No, a jump hold that starts and ends on the same step counts as one OK/NG. I verified with a couple of Max 300 PFC videos.

And your Mei score actually should be 956440. You got close to a full combo, and barely got in the AA range. Seems right to me.

@neothe0ne : It feels normal to me.
I used to calculate (with aproximation) an AA (SN style) while i was playing on Extreme.
It's an 10/1 ratio.
For AA a song with 450 steps without freezes you need to do 45 or less greats.
To resume, i count a marvelous and an ok as a perfect and a NC as 2 greats. Anyway, i know it's not super acurate but usually i'm not so far from the real thing and i coul tell that you AA'd Mei without looking at the score.

Also, That's the exact link i was talking about. Thank you

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