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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 Aug 3 at 15:26
  • $\begingroup$ @bobble Two matches $\endgroup$ – Bernardo Recamán Santos Aug 3 at 15:27
  • $\begingroup$ I think you need to specify in the puzzle what shapes are allowed for each digit. $\endgroup$ – msh210 Aug 3 at 15:34
  • $\begingroup$ @msh210 Done! Good idea! $\endgroup$ – Bernardo Recamán Santos Aug 3 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 Aug 3 at 18:35
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Ok, let's get the ball rolling:

Moving three matches

enter image description here

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

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Here's what I was thinking

990 --> 7^997
enter image description here

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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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