Difference between revisions of "Switchback"

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A '''switchback''' is a situation in which a [[ladder]] moves back two rows and changes direction. The attacker is still in control after the switchback. Although it is not always ladder escape, it often can be and is usually a strong play.
 
A '''switchback''' is a situation in which a [[ladder]] moves back two rows and changes direction. The attacker is still in control after the switchback. Although it is not always ladder escape, it often can be and is usually a strong play.
  
The situation prior to a switchback looks like this (assume the piece on D3 is in some way connected to the top):
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The situation prior to a switchback generally looks like this (assume the piece on D1 is in some way connected to the top):
  
 
<hex>R4 C8 Q1 Vd1, Vc2, Vh1, Hb2, Hd2, Hb4</hex>
 
<hex>R4 C8 Q1 Vd1, Vc2, Vh1, Hb2, Hd2, Hb4</hex>
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<hex>R4 C8 Q1 Vd1, Vc2, Vh1, Hb2, Hd2, Hb4, Vc3, Hc4, Vd3, Hd4, Ve3, He4, Vg3, Hf3 Vg3 N:on Vg1, Hf2, Vf1, He2, Ve1</hex>
 
<hex>R4 C8 Q1 Vd1, Vc2, Vh1, Hb2, Hd2, Hb4, Vc3, Hc4, Vd3, Hd4, Ve3, He4, Vg3, Hf3 Vg3 N:on Vg1, Hf2, Vf1, He2, Ve1</hex>
  
Note here how red was able to connect back to the D3 piece. This is not always possible, but even if it isn't the switchback can be used to create a long line connected to the edge and four rows back from it, a distinct advantage.
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Note here how red was able to connect back to the D1 piece. This is not always possible, but even if it isn't the switchback can be used to create a long line connected to the edge and four rows back from it, a distinct advantage.
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== A Different Situation ==
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A different kind of switchback can occur on the third row:
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<hex>R5 C8 Q1 Vd1, Vc2, Vh2, Hb2, Hd2, Hb4</hex>
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If Blue yields the ladder to the second row, then Red can create a switchback as shown above which would continue back and reconnect. If the ladder stays on the third row then Red creates a switchback as follows:
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<hex>R5 C8 Q1 Vd1, Vc2, Vh2, Hb2, Hd2, Hb4 N:on Vc3, Hc4, Vd3, Hd4, Ve3, He4, Vg3</hex>
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Red's piece on G3 is connected to the bottom. Play continues:
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<hex>R5 C8 Q1 Vd1, Vc2, Vh2, Hb2, Hd2, Hb4, Vc3, Hc4, Vd3, Hd4, Ve3, He4, Vg3 N:on Hf3, Vg1, Hf2, Vf1, He2, Ve1</hex>

Revision as of 01:03, 3 November 2009

A switchback is a situation in which a ladder moves back two rows and changes direction. The attacker is still in control after the switchback. Although it is not always ladder escape, it often can be and is usually a strong play.

The situation prior to a switchback generally looks like this (assume the piece on D1 is in some way connected to the top):

abcdefgh1234

Red makes a switchback as follows:

abcdefgh123413587246

Now the ladder continues back to the left:

abcdefgh123453142

Note here how red was able to connect back to the D1 piece. This is not always possible, but even if it isn't the switchback can be used to create a long line connected to the edge and four rows back from it, a distinct advantage.


A Different Situation

A different kind of switchback can occur on the third row:

abcdefgh12345

If Blue yields the ladder to the second row, then Red can create a switchback as shown above which would continue back and reconnect. If the ladder stays on the third row then Red creates a switchback as follows:

abcdefgh123451357246

Red's piece on G3 is connected to the bottom. Play continues:

abcdefgh12345642531