Lesson 4: Recovery
Blocks on top of holes.
|Recovering is done by removing all the lines that cover the hole.
This is of course hard when there are more lines.
|→||→||It is important to try to give yourself access to the hole after recovering.
|→||→||Lesson 2 has shown that S and Z are often used to fill 2 columns.
In this case, you should use a T instead.
Recovery by clearing lines
|These are examples of recovery by clearing a line.
|More examples of the same.|
|These are examples of recovery by clearing two lines.
|→||3 lines can only be recovered by providing a place for the J or L to hook onto.
Using a misdrop as a floor.
|You can use a missed I as a floor.
Using a T for this will leave a gap.
|Therefore it is better to use a L or J.
They can be cleared away neatly.
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