The feeder answers from earlier puzzles can be entered into the grid as follows.
| B | R10 | O18 | S | M | E3 | S | S | E | S5 | |
| L13 | I11 | |||||||||
| C1 | U7 | R | S | E | S | |||||
| E | S | |||||||||
| C | I | P | H17 | E | R19 | |||||
| O9 | ||||||||||
| N | ||||||||||
| T16 | R | U15 | S4 | T8 | ||||||
| T | ||||||||||
| A14 | ||||||||||
| H2 | A12 | I | R | |||||||
| T6 |
Ordering the highlighted letters according to their numbers yields the clue phrase CHESS TUTORIAL AUTHOR, which is
ELIAS