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María Lucía Uribe´s recent match-moving puzzle (Move matches and make largest possible number) begs for the following matter to be settled once and for all.

If each of the numbers from 100 to 999 is written using matches, such as 907 below, and I am allowed to move three of any number´s matches, with which number can I come up with the largest resulting possible number?

Below are admissible shapes for seven ramaining digits.

enter image description here enter image description here

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  • $\begingroup$ Does 1 have to have 2 matchsticks, or can it have just 1? $\endgroup$
    – bobble
    Commented Aug 3, 2020 at 15:26
  • $\begingroup$ @bobble Two matches $\endgroup$
    – Bernardo Recamán Santos
    Commented Aug 3, 2020 at 15:27
  • $\begingroup$ I think you need to specify in the puzzle what shapes are allowed for each digit. $\endgroup$
    – msh210
    Commented Aug 3, 2020 at 15:34
  • $\begingroup$ @msh210 Done! Good idea! $\endgroup$
    – Bernardo Recamán Santos
    Commented Aug 3, 2020 at 16:20
  • $\begingroup$ Althought it is not really a number by lateral thinking many numbers (like 91) can be turned into rot 13 (Vasvavgl) by moving three or four matches @BernardoRecamánSantos $\endgroup$
    – DrD
    Commented Aug 3, 2020 at 18:35

3 Answers 3

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Ok, let's get the ball rolling:

Moving three matches

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Moving four (not actually asked here but in the referenced Q)

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Here's what I was thinking

990 --> 7^997
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Sorry for not drawing matches, only numbers:

Starting with the three digit number 444, then moving three matches, I get the six digit number 111111

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