Sorry; please replace the last part by this: The remaining uncovered area is a Zigzag-path of width e consisting of n horizontal lines of length 1+e, n-1 vertical lines of length 1-e, and one vertical line of length 1. If e is small enough, it is possible to cover that area with a regular array of n+1 touching but not (2-dimensional) overlapping unit squares such that each of the first n of them covers one horizontal line and parts of the one or two connected vertical lines and the remaining square covers the remaining part of the (lower) vertical line.

## Correction

Sorry; please replace the last part by this:

The remaining uncovered area is a Zigzag-path of width

econsisting ofnhorizontal lines of length 1+e,n-1 vertical lines of length 1-e, and one vertical line of length 1. Ifeis small enough, it is possible to cover that area with a regular array ofn+1 touching but not (2-dimensional) overlapping unit squares such that each of the firstnof them covers one horizontal line and parts of the one or two connected vertical lines and the remaining square covers the remaining part of the (lower) vertical line.