Difference between revisions of "Edge template IV1c"

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(showing coordinates and referring to them)
(Converted to new hexboard diagrams. Also replaced lengthy inline discussion of Tom's move by a link.)
 
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The template:
+
Template IV1-c is a 4th row [[edge template]] with one stone. It uses some space on the 5th row. The shaded hex is not part of the template and can be occupied by Blue.
  
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E *:a4 E *:c5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E *:a4 S c5"
 
   />
 
   />
  
 
(From: [http://www.drking.org.uk/hexagons/hex/templates.html www.drking.org.uk])
 
(From: [http://www.drking.org.uk/hexagons/hex/templates.html www.drking.org.uk])
 +
 +
== Defending the template ==
  
 
Red has two main threats:
 
Red has two main threats:
Line 12: Line 16:
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E +:e3 E +:f3 E *:a4 R e4 E *:c5 E +:d5 E +:e5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E +:e3 E +:f3 E *:a4 R e4 S c5 E +:d5 E +:e5"
 
   />
 
   />
 
    
 
    
Line 19: Line 25:
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E +:g2 E *:k2 E *:a3 E *:b3 E +:f3 R g3 E +:h3 E *:a4 E +:f4 E +:g4 E +:h4 E *:c5 E +:e5 E +:f5 E +:g5 E +:h5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E +:g2 E *:k2 E *:a3 E *:b3 E +:f3 R g3 E +:h3 E *:a4 E +:f4 E +:g4 E +:h4 S c5 E +:e5 E +:f5 E +:g5 E +:h5"
 
   />
 
   />
 
    
 
    
Line 28: Line 36:
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E +:f3 E *:a4 E *:c5 E +:e5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 E +:f3 E *:a4 S c5 E +:e5"
 
   />
 
   />
 
    
 
    
Line 36: Line 46:
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R 2:d3 R 4:f3 E *:a4 B 3:c4 B 5:f4 E *:c5 R 6:d5 B 1:e5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R 2:d3 R 4:f3 E *:a4 B 3:c4 B 5:f4 S c5 R 6:d5 B 1:e5"
 
   />
 
   />
 
    
 
    
 
Red 2 threatens to connect to the bottom on the left side and forces a Blue move like 3. Likewise Red 4 forces 5 or similar moves. In the end 6 is safely connected via 2 or 4.  
 
Red 2 threatens to connect to the bottom on the left side and forces a Blue move like 3. Likewise Red 4 forces 5 or similar moves. In the end 6 is safely connected via 2 or 4.  
  
Second atttempt:
+
Second attempt:
  
 
<hexboard size="5x11"
 
<hexboard size="5x11"
 
   coords="hide"
 
   coords="hide"
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R 2:d3 B 1:f3 R 8:h3 E *:a4 B 3:c4 R 4:d4 R 6:e4 E *:c5 B 5:d5 B 7:e5"
+
  edges="bottom"
 +
  visible="area(g1,c3,a5,k5,k3,i1)"
 +
   contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R 2:d3 B 1:f3 R 8:h3 E *:a4 B 3:c4 R 4:d4 R 6:e4 S c5 B 5:d5 B 7:e5"
 
   />
 
   />
 
 
 
 
Now white has three main threads:
 
  
<hexboard size="5x11"
+
Now Red is connected by [[Tom's move]].
  coords="hide"
+
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R d3 B f3 E +:g3 R h3 E *:a4 B c4 R d4 R e4 R 1:f4 E +:g4 R 3:h4 E *:c5 B d5 B e5 B 2:f5 E +:g5 E +:h5"
+
  />
+
 
+
<hexboard size="5x11"
+
  coords="hide"
+
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 R 1:g2 E +:h2 E *:k2 E *:a3 E *:b3 R d3 B f3 E +:g3 R h3 E +:i3 E *:a4 B c4 R d4 R e4 E +:g4 E +:h4 E +:i4 E *:c5 B d5 B e5 E +:f5 E +:g5 E +:h5 E +:i5"
+
  />
+
 
+
using the [[ziggurat]] and
+
  
<hexboard size="5x11"
 
  coords="hide"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E +:g2 E *:k2 E *:a3 E *:b3 R d3 B f3 R h3 E *:a4 B c4 R d4 R e4 E +:f4 R 1:g4 E *:c5 B d5 B e5"
 
  />
 
 
 
where the group containing 1 is connected to the left via one of the spots marked with + and trivially to the bottom.
 
 
The overlap in which Blue has to play:
 
 
<hexboard size="5x11"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R d3 B f3 E +:g3 R h3 E *:a4 B c4 R d4 R e4 E +:g4 E *:c5 B d5 B e5 E +:f5 E +:g5"
 
  />
 
 
 
The 4 different moves are now considered from top left to bottom righ:
 
 
Move 1 (g3):
 
 
<hexboard size="5x11"
 
  coords="hide"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R d3 B f3 B 1:g3 R h3 E *:a4 B c4 R d4 R e4 R 2:f4 R 4:g4 E *:c5 B d5 B e5 B 3:f5"
 
  />
 
 
The group containing 4 is now connected to the bottom via the template [[Edge_template_III2b|III-2-b]] 
 
 
Move 2 (g4):
 
 
<hexboard size="5x11"
 
  coords="hide"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E +:h1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 R 4:i2 E *:k2 E *:a3 E *:b3 R d3 B f3 E +:g3 R h3 E *:a4 B c4 R d4 R e4 R 2:f4 B 1:g4 E *:c5 B d5 B e5 B 3:f5"
 
  />
 
 
 
The group containing 4 is now connected to the left by one of the threads marked with + and to the bottom via the template [[Edge_template_IV2b|IV-2-b]]
 
 
Move 3 (f5):
 
 
<hexboard size="5x11"
 
  coords="hide"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 R 4:g2 E *:k2 E *:a3 E *:b3 R d3 B f3 R h3 E *:a4 B c4 R d4 R e4 B 3:f4 R 2:g4 R 6:i4 E *:c5 B d5 B e5 B 1:f5 B 5:g5"
 
  />
 
 
 
If Blue plays 3 before 5, Red can play 4 before 6.
 
 
 
Move 4 (g5):
 
 
<hexboard size="5x11"
 
  coords="hide"
 
  contents="E *:a1 E *:b1 E *:c1 E *:d1 E *:e1 E *:f1 E *:j1 E *:k1 E *:a2 E *:b2 E *:c2 E *:d2 R f2 E *:k2 E *:a3 E *:b3 R d3 B f3 R h3 E *:a4 B c4 R d4 R e4 R 2:f4 R 4:i4 E *:c5 B d5 B e5 B 3:f5 B 1:g5"
 
  />
 
 
 
So all Blue blocking attempts fail.
 
  
 
[[category:edge templates]]
 
[[category:edge templates]]

Latest revision as of 05:42, 9 December 2020

Template IV1-c is a 4th row edge template with one stone. It uses some space on the 5th row. The shaded hex is not part of the template and can be occupied by Blue.

(From: www.drking.org.uk)

Defending the template

Red has two main threats:

and

using the ziggurat.

For trying to block the connection Blue has to play on the overlap:


First attempt:

243561

Red 2 threatens to connect to the bottom on the left side and forces a Blue move like 3. Likewise Red 4 forces 5 or similar moves. In the end 6 is safely connected via 2 or 4.

Second attempt:

21834657

Now Red is connected by Tom's move.