Difference between revisions of "Ladder puzzle 1/Solution"
Roland Illig (Talk | contribs) (→Wrong: f6: maybe not so wrong at all) |
Roland Illig (Talk | contribs) (→Alternative Solution: f6: typo) |
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<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> | ||
| − | The stone at f6 is a ladder breaker for the ladder starting at c7, and it also threatens to connect via | + | The stone at f6 is a ladder breaker for the ladder starting at c7, and it also threatens to connect via e5. |
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. | ||
Revision as of 13:57, 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 e5. 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.
