Difference between revisions of "Edge template IV3a"
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| − | + | Template IV3-a is a 4th row [[edge template]] with 3 stones: | |
<hexboard size="4x5" | <hexboard size="4x5" | ||
coords="hide" | coords="hide" | ||
| + | edges="bottom" | ||
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E *:a3 E *:e3 E *:d4 E *:e4" | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E *:a3 E *:e3 E *:d4 E *:e4" | ||
/> | /> | ||
| − | If the middle red piece is removed, the template stays valid, as long as the two remaining stones are connected to each | + | If the middle red piece is removed, the template stays valid, as long as the two remaining stones are connected to each other in some other way. |
(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 14: | Line 18: | ||
<hexboard size="4x5" | <hexboard size="4x5" | ||
coords="hide" | coords="hide" | ||
| − | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:b2 E +:c2 E *:a3 R | + | edges="bottom" |
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
| + | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:b2 E +:c2 E *:a3 R A:b3 E *:e3 E +:a4 E +:b4 E *:d4 E *:e4" | ||
/> | /> | ||
| Line 21: | Line 27: | ||
<hexboard size="4x5" | <hexboard size="4x5" | ||
coords="hide" | coords="hide" | ||
| − | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:c2 E +:d2 E *:a3 R | + | edges="bottom" |
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
| + | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:c2 E +:d2 E *:a3 R B:c3 E *:e3 E +:b4 E +:c4 E *:d4 E *:e4" | ||
/> | /> | ||
| Line 27: | Line 35: | ||
<hexboard size="4x5" | <hexboard size="4x5" | ||
| − | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E | + | coords="hide" |
| + | edges="bottom" | ||
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
| + | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E x:c2 E *:a3 E *:e3 E y:b4 E *:d4 E *:e4" | ||
/> | /> | ||
| − | + | If Blue plays at x: | |
<hexboard size="4x5" | <hexboard size="4x5" | ||
coords="hide" | coords="hide" | ||
| + | edges="bottom" | ||
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:b2 B 1:c2 E *:a3 R 4:b3 E +:c3 R 2:d3 E *:e3 B 3:c4 E *:d4 E *:e4" | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E +:b2 B 1:c2 E *:a3 R 4:b3 E +:c3 R 2:d3 E *:e3 B 3:c4 E *:d4 E *:e4" | ||
/> | /> | ||
| − | Red 4 is connected to the top by the two | + | Red 4 is connected to the top by the two cells marked with +. |
| − | + | If Blue plays at y: | |
<hexboard size="4x5" | <hexboard size="4x5" | ||
coords="hide" | coords="hide" | ||
| + | edges="bottom" | ||
| + | visible="-a1--a3 b1 d4 e3 e4" | ||
contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E *:a3 R 2:b3 B 5:c3 R 6:d3 E *:e3 B 3:a4 B 1:b4 R 4:c4 E *:d4 E *:e4" | contents="E *:a1 E *:b1 R c1 R d1 R e1 E *:a2 E *:a3 R 2:b3 B 5:c3 R 6:d3 E *:e3 B 3:a4 B 1:b4 R 4:c4 E *:d4 E *:e4" | ||
/> | /> | ||
| − | |||
| − | |||
[[category:edge templates]] | [[category:edge templates]] | ||
Latest revision as of 18:09, 11 December 2020
Template IV3-a is a 4th row edge template with 3 stones:
If the middle red piece is removed, the template stays valid, as long as the two remaining stones are connected to each other in some other way.
(From: www.drking.org.uk)
Defending the template
Red has two main threats:
and
For trying to block the connection Blue has to play on the overlap:
If Blue plays at x:
Red 4 is connected to the top by the two cells marked with +.
If Blue plays at y:
