Talk:15 puzzle solver: Difference between revisions
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== Mathematical meaning of random == |
== Mathematical meaning of random == |
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Unlike minimum, which I am surprised that anyone thinks means anything other than 'reduced to the least possible amount or degree', random means easy mathematically. There are 16!/2 15 puzzles, a little over 10 trillion, of which the number that are hard to solve is counted in the hundred thousands. Therefore a randomly chosen puzzle is easy. --[[User:Nigel Galloway|Nigel Galloway]] ([[User talk:Nigel Galloway|talk]]) 10:36, 6 October 2017 (UTC)--[[User:Nigel Galloway|Nigel Galloway]] ([[User talk:Nigel Galloway|talk]]) 10:36, 6 October 2017 (UTC) |
Unlike minimum, which I am surprised that anyone thinks means anything other than 'reduced to the least possible amount or degree', random means easy mathematically. There are 16!/2 15 puzzles, a little over 10 trillion, of which the number that are hard to solve is counted in the hundred thousands. Therefore a randomly chosen puzzle is easy. --[[User:Nigel Galloway|Nigel Galloway]] ([[User talk:Nigel Galloway|talk]]) 10:36, 6 October 2017 (UTC)--[[User:Nigel Galloway|Nigel Galloway]] ([[User talk:Nigel Galloway|talk]]) 10:36, 6 October 2017 (UTC) |
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== Extra credit for non-random puzzles == |
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We could offer extra credit for solving hard puzzles: |
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<pre> |
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2 1 3 4 |
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5 6 7 8 |
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9 10 11 12 |
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13 14 15 0 |
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</pre> |
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and |
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<pre> |
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0 12 9 13 |
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15 11 10 14 |
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3 7 2 5 |
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4 8 6 1 |
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</pre> |