The case notes
Reading a row index
A digit in a marked cell tells where that cell’s row number appears in the same column. Watch a worked example, then try the idea in a puzzle.
Put it into practice
Marked cell: row 2
A row index points along a column. Read the row number first: this marked cell is in row two.
r2c1 = 6 → r6c1 = 2
There is a six in that mark. It says that row six of this column contains the digit two.
Row r holds v → row v holds r
The row number and the digit trade places. Always stay in the same column. Other marks can give you the reverse direction too.
Read the transcript
A row index points along a column. Read the row number first: this marked cell is in row two. There is a six in that mark. It says that row six of this column contains the digit two. The row number and the digit trade places. Always stay in the same column. Other marks can give you the reverse direction too.
