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  #1  
Old March 31st, 2003, 08:22 AM
Rana Rana is offline
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Lightbulb Intresting Puzzle

Here is an interesting puzzle.

There are two groups of 4 horses each . All horses in a group are in a single line. The groups face each other on a bridge. A simple representation may look like this

1H,2H,3H,4H H1,H2,H3,H4

The bridge is not wide enough for horses to pass on side. There is gap of one horse between 4H and H1. Objective of the puzzle is to cross the bridge for each group.

The rules are:

1. Horses cannot step back.
2. Not more than one horse can move at one time.
3. The horse can jump over next horse if there is a space after the jumped-over horse.
4. The horse can step forward if there is space.

If you can solve it, give your step. As you see to start the puzzle there are only 4 possible moves.

4H moves forward or
H1 moves forward or
H2 jumps over H1 or
3H jumps over 4H.
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Old March 31st, 2003, 11:42 AM
Rana Rana is offline
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Haree Manee,

3 give up and I will give the answer, Try to solve it. It is sure entertaining.
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  #3  
Old March 31st, 2003, 12:31 PM
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My Solution
1. 4h moves forward
2. H1 jumps over 4h
3. H2 moves forward
4. 4h jumps over H2
5. 3h jumps over H1
6. 2h moves forward
7. H1 jumps over 2h and 1h and keeps moving forward
8. H2 jumps over 3h, 2h and 1 h and keeps moving forward
9. H3 jumps over 4h, 3h, 2h and 1h and keeps moving forward
10. H4 moves forward, jumps over 4h, 3h, 2h and 1h and keeps moving forward
11. Now only 1h, 2h, 3h and 4h are left and they can all move off one at a time .

If you plot the moves on a piece of paper (or use some counters), it becomes fairly obvious how to proceed after step 6.
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  #4  
Old March 31st, 2003, 12:57 PM
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JaiSpeaks JaiSpeaks is offline
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Solution 2
1) h1 moves forward
2) 4h jumps over h1
3) 3h moves one step
4) h1 jumps over 3h
5) h2 jumps over 4h
6)h3 moves 1 step
7)4h moves forward crosses the bridge
8)3h crosses , then 2h crosses , then 1h crosses
9) h1 h2 h3 h4 walks the remaining distance . its open
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