Difference between revisions of "Edge template IV2a"
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− | + | Template IV2-a is a 4th row [[edge template]] with 2 stones: | |
− | < | + | <hexboard size="4x4" |
+ | coords="none" | ||
+ | edges="bottom" | ||
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1" | ||
+ | /> | ||
+ | |||
+ | == Defending the template == | ||
Red has two relevant threats: | Red has two relevant threats: | ||
− | < | + | <hexboard size="4x4" |
+ | coords="none" | ||
+ | edges="bottom" | ||
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1 R b3 E +:(b2 c2 a4 b4)" | ||
+ | /> | ||
and | and | ||
− | < | + | <hexboard size="4x4" |
− | + | coords="none" | |
− | This leaves | + | edges="bottom" |
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1 R c3 E +:(c2 d2 b4 c4)" | ||
+ | /> | ||
+ | This leaves Blue with two options in the overlap of these threats: | ||
− | < | + | <hexboard size="4x4" |
+ | coords="none" | ||
+ | edges="bottom" | ||
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1 E x:c2 y:b4" | ||
+ | /> | ||
− | + | If Blue plays at x: | |
− | < | + | <hexboard size="4x4" |
− | + | coords="none" | |
+ | edges="bottom" | ||
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1 B 1:c2 R 2:d2 B 3:c4 R 4:b3 E +:b2 +:c3" | ||
+ | /> | ||
+ | Red is connected by double threat at the two cells marked "+". | ||
− | + | If Blue plays at y: | |
− | < | + | <hexboard size="4x4" |
− | + | coords="none" | |
+ | edges="bottom" | ||
+ | visible="-a1--a3 b1" | ||
+ | contents="R c1 d1 B 1:b4 R 2:b3 B 3:a4 R 4:d3" | ||
+ | /> | ||
+ | Red is connected by a [[trapezoid]]. | ||
[[category:edge templates]] | [[category:edge templates]] |
Latest revision as of 18:23, 11 December 2020
Template IV2-a is a 4th row edge template with 2 stones:
Defending the template
Red has two relevant threats:
and
This leaves Blue with two options in the overlap of these threats:
If Blue plays at x:
Red is connected by double threat at the two cells marked "+".
If Blue plays at y:
Red is connected by a trapezoid.