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2. No letter touches an adjacent letter of the alphabet on an edge or corner

3. The fields with L and Y touch each other with an edge

4. The sum of the field index numbers of B and R is even

5. The field index numbers of the existing letters of RATEN are rising within the word (but not necessarily directly one after the other)

6. The field index numbers of the existing letters of HILFE are rising within the word (but not necessarily directly one after the other)

7. The field index numbers of the existing letters of TRICKY are decreasing within the word (but not necessarily directly one after the other)