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BGonline.org Forums
61P-63R-62Z-61P-52Z-52
Posted By: Nack Ballard In Response To: 61P-63R-62Z-61P-52@-52 (Timothy Chow)
Date: Saturday, 3 March 2012, at 4:22 p.m.
I like stepping up the last back checker with 24/22, and with the 5 play 13/8 instead of 15/10 (the latter of which looks safer only before one considers the strong duplication of 3s). The 13/8 portion avoids getting hit outside with 61 52 in exchange for getting hit outside with 63 33. (I think White should not hit outside with 53 43 32 31 or 21, while her 66 will most likely win regardless.)
61P-63R-62Z-61P-52Z-52
Granted, there is the matter of Blue escaping cleanly next turn if not hit, but that's a double-edged consideration. In the meantime, the 15pt checker controls vital points in the outfield and puts White on the spot if she rolls 62 52 61 51 -- rolls that play much better for her if Blue plays the less coordinated 24/22 15/10.
Regarding Nactation:
White's last play of 24/22 13/8 is S or Z. One might nactate @ (anchor) with the best 5 being assumed, but IMO 13/8 is not an obvious enough 5 to warrant such usage; strictly speaking, the hit/more/6 rule ranks the 6/1* hit above (the closer-to-6pt) 13/8. Better to use # (alt anchor) for that play.
That said, I usually prefer using a symbol that describes the entire move, when possible. In isolation, I would S for White's 24/22 13/8, but I chose Z because her previous play of 24/22 13/7 is also nactated Z. In a similar vein, going forward from the diagram, I'd probably use Z for Blue's 24/22 15/10, and z for his 24/22 13/8, though instead using S for the first and s for the second is perfectly fine.
Nack
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