Difference between revisions of "Ladder puzzle 1/Solution"
Roland Illig (Talk | contribs) (Explained the correct solution) |
Roland Illig (Talk | contribs) (→Wrong: f6: maybe not so wrong at all) |
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Finally, Red plays a double threat. This stone is the ladder helper, and it also threatens to connect along the top. | Finally, Red plays a double threat. This stone is the ladder helper, and it also threatens to connect along the top. | ||
| − | == | + | == Alternative Solution: f6 == |
<hex>R8 C8 Q1 Vc6 Vd5 Vd4 Ve3 Vh4 Hd6 Hb8 Hc1 He4 Hg3 N:on Vf6 He7</hex> | <hex>R8 C8 Q1 Vc6 Vd5 Vd4 Ve3 Vh4 Hd6 Hb8 Hc1 He4 Hg3 N:on Vf6 He7</hex> | ||
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The stone at f6 is a ladder breaker for the ladder starting at c7, and it also threatens to connect via f5. | The stone at f6 is a ladder breaker for the ladder starting at c7, and it also threatens to connect via f5. | ||
This looks very strong, but Blue can still defend at e7, which is a ladder breaker and threatens a connection at the lower side. | This looks very strong, but Blue can still defend at e7, which is a ladder breaker and threatens a connection at the lower side. | ||
| − | + | ||
| + | <hex>R8 C8 Q1 Vc6 Vd5 Vd4 Ve3 Vh4 Hd6 Hb8 Hc1 He4 Hg3 Vf6 He7 V3g6 H4f7 V5g7 H6e6</hex> | ||
| + | |||
| + | Now Red pushes to the right, making both f4 and f6 winning points. Blue cannot defend both. | ||
[[category:ladder puzzle]] | [[category:ladder puzzle]] | ||
Revision as of 13:56, 16 February 2009
Correct: e5
Red's main threat is the ladder starting at c7. If Red plays out this ladder, Blue can block it. So Red needs a helping stone somewhere on the right and on the second line from the bottom. R1 threatens the follow-up moves at *, which Blue must defend.
Red continues that way, using the stone at the right. Again, Blue has to defend.
Finally, Red plays a double threat. This stone is the ladder helper, and it also threatens to connect along the top.
Alternative Solution: f6
The stone at f6 is a ladder breaker for the ladder starting at c7, and it also threatens to connect via f5. This looks very strong, but Blue can still defend at e7, which is a ladder breaker and threatens a connection at the lower side.
Now Red pushes to the right, making both f4 and f6 winning points. Blue cannot defend both.
