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Hashi help

 
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Hashi help - 4/16/2020 3:47:44 PM   
Rhythmick

 

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What would the next step be please? Pure logic, I don't want to make assumptions and work through until it fails.




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RE: Hashi help - 4/17/2020 12:26:51 AM   
CharleneTX

 

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I see one move, but I'm not sure it will help you progress much farther.

Look at the 3 in the 3rd row up from the bottom. It needs 2 more links. Only 1 link can go to the 2 above. Therefore, at least 1 link must go to the 2 to the right.

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RE: Hashi help - 4/17/2020 7:43:36 AM   
Rhythmick

 

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Thanks, that helped. I completed it but had to resort to trying assumptions.

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RE: Hashi help - 4/17/2020 10:14:53 AM   
dave

 

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You need to use the 3rd rule: "When completed, all bridges are interconnected enabling passage from any island to another". There are several trivial steps in the puzzle if you use this rule. For example, the 4 on the bottom row. If you connect its last bridge to the right, you will get an isolated segment. Therefore the last bridge of the 4 on the bottom row should go upwards.

Thanks, Dave

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RE: Hashi help - 4/17/2020 4:41:30 PM   
mig23

 

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Also there are two 2s that are adjacent - both bridges can't connect them, therefore at least one bridge must go elsewhere.

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