Size 6 e3 loses (Y)

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e3 and symmetrical moves (c5 e5) are losing moves even if the swap rule is disabled. Blue answers d5.


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Blue threats to win via b6 reduction (or e6). The plus marked hexes show the threat space.


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Blue also threats to win via c5 reduction (or e5). So Red has to play in one of the hexes that belong to the four threat spaces.


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Solution to intrusion in b5,b6 or c5

Blue plays d4.


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The 2 threats share no space so Blue wins.


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Blue had an angle template

Solution to intrusion in c6

Blue plays c5.


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The solution is very similar.