I am very sure you mean that Marathon over at TetrisFriends. It's a "goal"-type Marathon, pretty much the only one out there. Everything what I say here is only true for that type of Marathon. If the level advances every 10 cleared lines, you have to do T-Spins nonstop (or Tetrises nonstop in the older ones).

**Line clears**When you reach a new level, the goal is to get

**5 times level** "lines". You subtract from that goal by doing some line clears (or T-Spins that don't clear any lines). The value of a lineclear is dependend on how many lines you clear at once and if you make a T-Spin or not. However, what all lineclears have in common is that they score 100 times as many points as they subtract from the goal (whereas the points are also multiplied by the current level). For example a Single is worth 100 points and 1 "line"; a Double is worth 300 points and 3 "lines"; a Triple is worth 500 points and 5 "lines"; and a Tetris is worth 800 points and 8 "lines" (or multiply by 1.5 if back to back). So, it should make no difference if you score a Tetris OR a Double and a Triple OR 8 Singles: in all cases you have subtracted 8 "lines" from the goal and scored 800 points (multiplied by the level). That's the reason why people usually complete the Marathon with 680k points.

However, there's also the concept of half "lines". You can also reach

**half** "lines" through

**combos**, that means clearing lines with some consecutive pieces. A 1 combo is worth 50 points and 0.5 "lines"; a 2 combo is worth 100 points and 1 "line"; a 3 combo is worth 150 points and 1.5 "lines"; and so on. The game rounds those "lines" numbers down. So in case of a 1 combo, nothing is subtracted from the goal (except for the line clear values) but you still get those 50 points (multiplied by the level). Or in case for a 3 combo, 1 "line" is substracted from the goal and you get 150 points. The most efficient to abuse this system is by doing 1 combos that consist of 2 Singles. Those things subtract 2 "lines" from the goal and score 250 points (200 points from the 2 Singles and 50 points from the 1 combo). Let's say you do that 4 times in a row, then you've subtracted 8 lines from the goal but scored 1200 points (compared to those 800 points from the line clear examples above).

**Drop points**There's another way to gain some points, namely by softdropping or harddropping a piece. You get 1 point for each row you accelerate a piece through

**softdrop**; and you get 2 points for each row you travel through

**harddrop**. However, those points are not multiplied by the current level (in contrast to line clear points). So, these points are rather unimportant for your final score. It's still worth noting that you can get more points by doing lesser line clears. For example, you need twice as many pieces to make 8 Singles (8 lines) than to make a Tetris (4 lines), although they both subtract the same number from the goal. Twice as many pieces roughly means twice as many drop points. Also, you can softdrop a piece to the very buttom and then put it in hold. That's some free drop points. There's also a trick where you can farm an infinite number of points on level 1 but it would take over an hour to collect even 10,000 points, so nobody does that. Drop points only really matter, if you want to reach the all-time top 10; you don't have to use a drop-points abuse to score 1 million points.

**End of a level**Let's say you are 8 "lines" away from completing a level. Then you could just score a Tetris and you're done with it. Or you could reduce the goal by 7 further "lines" and then score a Tetris. The second way takes longer but also results in more points. So here's the final abuse which I would call

**overachieving** or surplus: Reduce the goal to 1 "line" and then make a high value line clear. Back-to-back (b2b) T-Spins have the highest value: It's 1200 points (and 12 "lines") for a b2b T-Spin Single (as much as a b2b Tetris); 1800 points for a b2b T-Spin Double and a whopping 2400 points for a

**T-Spin Triple**. You get that back-to-back bonus if your previous line clear was also a T-Spin or Tetris. The best way to get the back-to-back bonus is doing a

T-Spin Mini (clearing 1 line) as it subtracts only 2 "lines" from your goal.

So that's the strategy that leads towards a big score:

- If you are still some lines away from the next level, then make some 1 combos consisting of 2 Singles each. Each time you do so, you get 2 "lines" closer to the next level.
- If you are a few lines away from the next level, then gain the back-to-back bonus and score a Tetris or even better a T-Spin line clear. Best case: If you are 3 lines away from the next level, then make a T-Spin Mini and sometime later a b2b T-Spin Triple.

If you consider my advices, then you should have no problem to score 800k points in Tetris Friends Marathon. Maybe even 1000k points, if you are skilled and practice a little (needs some b2b T-Spin Triples).

Here's a good way to make a T-Spin Mini followed by a

**b2b T-Spin Double**, if you are 3 "lines" away from the next level (also works under high gravity):

And here's a good way to make a T-Spin Mini followed by a

**b2b T-Spin Triple**, if you are 3 "lines" away from the next level (also works under high gravity):