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18pt, or 21pt + 7pt

Posted By: Nack Ballard
Date: Friday, 19 February 2010, at 12:33 a.m.

In Response To: Rollouts (jdg)

157 62S-63X-54@-63 158

155 64S-63X-54@-63 158

Hmmm... general opening rule (equal race): 18pt is better than the 21pt when your opponent holds the 20pt?

This early in the game, owning the 18pt is better than owning the 21pt, period.

OTOH, the 21pt plus the 7pt is better than the 18pt by itself. But that's only IF the 7pt is a meaningful blocking point, which is not the case in the 62S-63X-54@-63 position above, where White owns her 20pt anchor.

Change the position to 62S-63X-32@-63, as shown below and now Blue should make his 21pt and 7pt because the 7pt is a meaningful blocking point against White's (deeper) 22pt anchor.

By the way, duplication of White's 2s or 4s is not a salient factor in Blue's decision. Blue should still make the 18pt in 64S-63X-54@-63 (right-hand diagram above), and he should still make the 21pt and 7pt in 64S-63X-32@-63 (right-hand diagram below).

Hope that helps,

Nack

161 62S-63X-32@-63 158

159 64S-63X-32@-63 158

Messages In This Thread

• 62S-63X-54@-63?
  Stick -- Tuesday, 16 February 2010, at 5:32 a.m.
  • 62S-63X-54@-63?
    Paul Weaver -- Tuesday, 16 February 2010, at 6:36 a.m.
    • 62S-63X-54@-63?
      Stick -- Tuesday, 16 February 2010, at 7:22 a.m.
      • 64S-63X-54@-63?
        Nack Ballard -- Wednesday, 17 February 2010, at 7:19 p.m.
    • 62S-63X-54@-63?
      Ian Shaw -- Tuesday, 16 February 2010, at 9:23 a.m.
    • 62S-63X-54@-63?
      Leonardo Jerkovic -- Tuesday, 16 February 2010, at 3:12 p.m.
      • 62S-63X-54@-63?
        Timothy Chow -- Tuesday, 16 February 2010, at 4:17 p.m.
        • 62S-63X-54@-63?
          Leonardo Jerkovic -- Tuesday, 16 February 2010, at 4:39 p.m.
      • 62S-63X-54@-63?
        mtuhtan -- Tuesday, 16 February 2010, at 4:20 p.m.
      • 62S-63X-54@-63?
        Paul Weaver -- Tuesday, 16 February 2010, at 6:43 p.m.
        • 62S-63X-54@-63?
          Nack Ballard -- Wednesday, 17 February 2010, at 1:33 a.m.
  • 62S-63X-54@-63?
    Martin -- Tuesday, 16 February 2010, at 11:34 a.m.
  • 62S-63X-54@-63?
    neilkaz -- Tuesday, 16 February 2010, at 6:54 p.m.
    • 62S-63X-54@-63?
      christian munk-christensen -- Tuesday, 16 February 2010, at 9:07 p.m.
  • @?
    W Womack -- Tuesday, 16 February 2010, at 10:51 p.m.
    • @?
      Timothy Chow -- Tuesday, 16 February 2010, at 11:57 p.m.
  • 62S-63X-54@-63?
    johnk -- Wednesday, 17 February 2010, at 1:40 a.m.
  • Rollouts
    Stick -- Thursday, 18 February 2010, at 5:46 p.m.
    • Rollouts
      jdg -- Thursday, 18 February 2010, at 9:01 p.m.
      • 18pt, or 21pt + 7pt
        Nack Ballard -- Friday, 19 February 2010, at 12:33 a.m.