Difference between revisions of "Tips and tricks"

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== [[Double ladder]] on [[Second row|2nd line]] [[Ladder escape|escape]] ==
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== 2nd and 4th row [[parallel ladder]] [[Ladder escape|escape]] ==
 
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Suppose we have this situation. There are two [[Double ladder|linked ladders]] here
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Suppose we have this situation. There are [[parallel ladder]]s on the 2nd and 4th row.
 
<hex>R6, C9, Q1, Vb1, Vb2, Vb3, Vb4, Vb5, Vc3, Hi1, Ha6, Hb6, Hc1, Hc2, Hd2, He1, Hf1, Hg1, Hh1, Hc4, Vd3, Hd4, Vc5, Hc6, Hh2, Hi2, Hi3</hex>
 
<hex>R6, C9, Q1, Vb1, Vb2, Vb3, Vb4, Vb5, Vc3, Hi1, Ha6, Hb6, Hc1, Hc2, Hd2, He1, Hf1, Hg1, Hh1, Hc4, Vd3, Hd4, Vc5, Hc6, Hh2, Hi2, Hi3</hex>
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[[Red (player)|Red]] to move. Can she [[win]]? The answer is yes: Red can win by using [[Tom's move]]!
  
[[Red (player)|Red]] to move. Can he [[win]]? The answer is yes. The double ladder escape and the only winning move is f4.
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[[category:strategy]]
 
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{{stub}}
<hex>R6, C9, Q1, Vb1, Vb2, Vb3, Vb4, Vb5, Vc3, Hi1, Ha6, Hb6, Hc1, Hc2, Hd2, He1, Hf1, Hg1, Hh1, Hc4, Vd3, Hd4, Vc5, Hc6,          Vf4, Hh2, Hi2, Hi3</hex>
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[[Blue (player)|Blue]] can't play:
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== How to block properly (by lazyplayer) ==
  
* d5 due to the [[threat]] at e3
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If your blocking move has too little influence on both your edges, then the opponent has at least two good zones of the board that are worth trying, one for each side. For example, compare the situation for Blue in these two cases.
* e3 or e4 because then f4 is a [[ladder escape]] from the [[Second row|2nd line]].  
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So the only move not losing ''yet'' is e5.
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<hex>R11 C11 labels play numbered f6 e9 g8 f7 h6 h9 c9</hex>
  
<hex>R6, C9, Q1, Vb1, Vb2, Vb3, Vb4, Vb5, Vc3, Hi1, Ha6, Hb6, Hc1, Hc2, Hd2, He1, Hf1, Hg1, Hh1, Hc4, Vd3, Hd4, Vc5, Hc6,          Vf4 He5, Hh2, Hi2, Hi3</hex>
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In this case, the Blue initial pieces (E9 and F7) have very little influence on both Blue's edges and thus don't provide any immediate threat on bottom. Blue has no choice but to play D8, which however is still far from being connected to any Blue's edge.
  
Now Red should play g3 (or d5, d6 first) and thus make a [[Multiple threats|double threat]]. Observe that one connection involves [[Hex (board element)|hexagons]] e4, d5, d6, and the other one e2, e3, f2, f3, g2; so they are separate from each other and Blue can't [[Blocking|stop]] them both with one move.
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<hex>R11 C11 labels play numbered f6 f8 e8 f7 e7 d3</hex>
You can also check for yourself that the f4, g3 group is [[Connection|connected]] to the [[Bottom edge|bottom]].
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<hex>R6, C9, Q1, Vb1, Vb2, Vb3, Vb4, Vb5, Vc3, Hi1, Ha6, Hb6, Hc1, Hc2, Hd2, He1, Hf1, Hg1, Hh1, Hc4, Vd3, Hd4, Vc5, Hc6, Vf4, He5, Vg3, Hh2, Hi2, Hi3</hex>
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This position on the other hand is quite more tricky for red to play correctly than the first. Blue is still too much focused (unavoidably, given the weak position) on bottom but, after having obtained a reasonable influence on the right side, he can now concentrate his efforts on the left side of the board.

Revision as of 06:02, 9 December 2020

2nd and 4th row parallel ladder escape

Suppose we have this situation. There are parallel ladders on the 2nd and 4th row.

abcdefghi123456

Red to move. Can she win? The answer is yes: Red can win by using Tom's move!

How to block properly (by lazyplayer)

If your blocking move has too little influence on both your edges, then the opponent has at least two good zones of the board that are worth trying, one for each side. For example, compare the situation for Blue in these two cases.

abcdefghijk12345678910111543726

In this case, the Blue initial pieces (E9 and F7) have very little influence on both Blue's edges and thus don't provide any immediate threat on bottom. Blue has no choice but to play D8, which however is still far from being connected to any Blue's edge.

abcdefghijk1234567891011615432

This position on the other hand is quite more tricky for red to play correctly than the first. Blue is still too much focused (unavoidably, given the weak position) on bottom but, after having obtained a reasonable influence on the right side, he can now concentrate his efforts on the left side of the board.