Difference between revisions of "Template VI1/Intrusion on the 4th row"
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This page is devoted to details on how to [[Defending against intrusions in template VI1|defend against intrusions in template VI]]. This page explores what are the possibilities for Red to defend the template when Blue intrude on the 4th row. | This page is devoted to details on how to [[Defending against intrusions in template VI1|defend against intrusions in template VI]]. This page explores what are the possibilities for Red to defend the template when Blue intrude on the 4th row. | ||
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| − | + | contents="R j2 B i4" | |
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Red should move here (or the equivalent mirror-image move at "+"): | Red should move here (or the equivalent mirror-image move at "+"): | ||
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| − | + | contents="R h3 j2 B i4 E +:k3" | |
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== Elimination of irrelevant Blue moves == | == Elimination of irrelevant Blue moves == | ||
This gives Red several immediate threats: | This gives Red several immediate threats: | ||
From III1a: | From III1a: | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R g5 h3 j2 B i4 E +:e7 +:f6 +:f7 +:g4 +:g6 +:g7 +:h4 +:h5 +:h6 +:h7" | |
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From III1a again: | From III1a again: | ||
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| − | + | contents="R g5 h3 j2 B i4 E +:d7 +:e6 +:e7 +:f5 +:f6 +:f7 +:g4 +:g6 +:g7 +:h4" | |
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From III1b : | From III1b : | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R g5 h3 j2 B i4 E +:d7 +:e6 +:e7 +:f5 +:f6 +:g4 +:g6 +:g7 +:h4 +:h5 +:h6 +:h7" | |
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From IV1a: | From IV1a: | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R g4 h3 j2 B i4 E +:b7 +:c6 +:c7 +:d5 +:d6 +:d7 +:e5 +:e6 +:e7 +:f4 +:f5 +:f6 +:f7 +:g5 +:g6 +:g7 +:h5 +:h6 +:h7" | |
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From IV1b: | From IV1b: | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R g4 h3 j2 B i4 E +:b7 +:c6 +:c7 +:d5 +:d6 +:d7 +:e5 +:e6 +:e7 +:f4 +:f5 +:f7 +:g5 +:g6 +:g7 +:h4 +:h5 +:h6 +:h7 +:i5 +:i6 +:i7" | |
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The intersection of all of these leaves: | The intersection of all of these leaves: | ||
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| − | + | coords="full bottom right" | |
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R h3 j2 B i4 E +:e7 +:g4 +:g5 +:g6 +:g7" | |
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== Specific defense == | == Specific defense == | ||
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=== Bg4 === | === Bg4 === | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| + | contents="R h3 2:h4 4:h5 j2 B 1:g4 3:g6 i4" | ||
| + | /> | ||
And now either | And now either | ||
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| − | + | contents="R h3 h4 h5 j2 2:j5 B g4 g6 1:h6 i4 E +:i5 +:k3" | |
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or | or | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R h3 h4 h5 2:h6 j2 6:j5 4:j6 B g4 g6 3:g7 1:h7 i4 5:i6 E +:i5 +:k3" | |
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=== Bg5 === | === Bg5 === | ||
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| + | contents="R 2:f4 h3 j2 B 1:g5 i4" | ||
| + | /> | ||
Threatening: | Threatening: | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R 4:d5 f4 h3 j2 B g5 i4 E +:a7 +:b6 +:b7 +:c5 +:c6 +:c7 +:d6 +:d7 +:e4 +:e5" | |
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| − | + | contents="R 4:e6 f4 h3 j2 B g5 i4 E +:d7 +:e5 +:e7 +:f5" | |
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| − | + | contents="R 4:e5 f4 h3 j2 B g5 i4 E +:b7 +:c6 +:c7 +:d5 +:d6 +:e6 +:e7 +:f5 +:f6 +:f7" | |
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So the only hope for Blue lies in the intersection of the threats, Be5, but it is unsufficient: | So the only hope for Blue lies in the intersection of the threats, Be5, but it is unsufficient: | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R f4 2:f5 4:f6 6:g6 h3 j2 8:j5 B 1:e5 3:e7 5:f7 g5 7:g7 i4 E +:i5 +:k3" | |
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=== Bg6 === | === Bg6 === | ||
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| − | + | contents="R 2:g5 h3 4:h5 j2 B 3:f6 1:g6 i4 E +:e7" | |
| + | /> | ||
3 could be played at + with the same effect; in any case | 3 could be played at + with the same effect; in any case | ||
now either | now either | ||
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| − | + | contents="R g5 h3 h5 j2 2:j5 B f6 g6 1:h6 i4 E +:i5 +:k3" | |
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or | or | ||
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| − | + | visible="area(a7,n7,n5,k2,i2,c5)" | |
| − | + | contents="R g5 h3 h5 2:h6 j2 6:j5 4:j6 B f6 g6 3:g7 1:h7 i4 5:i6 E +:i5 +:k3" | |
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=== Be7 === | === Be7 === | ||
Either this | Either this | ||
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| − | + | contents="R 2:g5 h3 4:h5 j2 6:j5 B 1:e7 3:g6 5:h6 i4 E +:i5 +:k3" | |
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or a minor variation | or a minor variation | ||
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| − | + | contents="R 2:g5 h3 4:h5 6:h6 j2 10:j5 8:j6 B 1:e7 3:g6 7:g7 5:h7 i4 9:i6 E +:i5 +:k3" | |
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=== Bg7 === | === Bg7 === | ||
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| − | + | contents="R 2:g5 h3 4:h6 j2 8:j5 6:j6 B 3:f6 1:g7 5:h7 i4 7:i6 E +:i5 +:k3" | |
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[[category:edge templates]] | [[category:edge templates]] | ||
Revision as of 02:33, 9 March 2021
This page is devoted to details on how to defend against intrusions in template VI. This page explores what are the possibilities for Red to defend the template when Blue intrude on the 4th row.
Red should move here (or the equivalent mirror-image move at "+"):
Contents
Elimination of irrelevant Blue moves
This gives Red several immediate threats: From III1a:
From III1a again:
From III1b :
From IV1a:
From IV1b:
The intersection of all of these leaves:
Specific defense
So we must deal with each of these responses. (Which will not be too hard!)
Bg4
And now either
or
Bg5
Threatening:
So the only hope for Blue lies in the intersection of the threats, Be5, but it is unsufficient:
Bg6
3 could be played at + with the same effect; in any case now either
or
Be7
Either this
or a minor variation
