Object: disentangle the given wire-and-string puzzles, then re-entangle them.
 
The following assumes that you are somewhat familiar with the game 'Knots III'.
Knots 4 has been especially designed for strings that are looped around a fixed piece (or several fixed parts).
Most knots presented here are derived from commnercially available WIRE-AND-STRING PUZZLES. In fact, 'Knots 4' is the first software worldwide which can simulate the manipulation of wire-and-string puzzles.

Click the button at the right border marked 'S' to enter the string manipulation mode. During the manipulation mode the button will show an 'M'. During the manipulation mode all parts (fixed or flexible) are painted in the same colour.
For technical reasons you cannot manipulate the string during the 'S' mode, when the fixed parts are highlighted.

The fixed part(s) can be highlighted again at any time during the game by clicking the button. Click the button again to return to the string manipulation mode.

At the top right you can set a maximum length for the string. It will be checked only if set greater than zero. The current length of string is also displayed (after the first move). Self-crossings count twice.

You win if you can disentangle the knot and place the string as a small ring at the top right target. Try to do this in as few moves as possible.

For experts: once you removed the string, try to re-create the given knot!

Variants 1 - 24 : Wire-and-string puzzles : closed wire loop, closed string
Variants 25 - 27 : Other wire-and-string puzzless
Variants 28 - 30 : Knots
If you get the message 'too many moves generated', go back one move and try another move.
All puzzles are solvable! Each variant has its own game text describing the puzzle.

There are several piece sets available!
Knots 4 works best with SMART MOVES turned OFF!
 
 
Associated reading:
Compendium of over 7000 Wire Puzzles, Richard Hess, 5th edition, March 1991
Denkspiele der Welt, Pieter van Delft and Jack Botermans, Hugendubel, 1980.
Knots, Peter Owen, Apple Press, 1993.
 
More freeware as well as real puzzles and games at my homepage http://karl.kiwi.gen.nz.