magicwand versus drmwc

Magicwand · Post by **Magicwand** » Fri Jun 14, 2013 9:45 am

Click Here To Show Diagram Code: [go]$$Bcm131 B has captured 8; W has captured 3 $$ --------------------------------------- $$ | . . . . 4 8 1 X . . . . . . . . . . . | $$ | . . . . . X O O X 3 . . . . . . . . . | $$ | . . . O . X O 2 O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . 0 O O . . . O X X X . . . . . X . . | $$ | . 9 . . . X . O O . . . X . 5 . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . 7 , X X . . X O O . O O . , . . . | $$ | . . 6 . X . . X . X X O X O . O . . . | $$ | . . . . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . . . . . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

drmwc · Post by **drmwc** » Fri Jun 14, 2013 10:47 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 8; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . . . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . . . . . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Magicwand · Post by **Magicwand** » Fri Jun 14, 2013 5:55 pm

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 8; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . . . . . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

drmwc · Post by **drmwc** » Sat Jun 15, 2013 3:16 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 8; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . . . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

foeZ · Post by **foeZ** » Sat Jun 15, 2013 3:43 am

tj86430 · Post by **tj86430** » Sat Jun 15, 2013 3:51 am

opex · Post by **opex** » Sat Jun 15, 2013 5:06 am

tj86430 wrote:
drmwc wrote:There is a mole, who lives in a hole. You like eating moles, so you want to catch the mole. There are 5 entrances to the hole, which are arranged in a line.

Once a day, you look through a hole. If the mole is directly underneath you, you capture the mole. Othewrise, the mole goes free for the day. Ovenight, the mole moves exactly one hole away from its current position to a new hole.

What strategy guarantees capturing the mole?

Assuming, that the mole must move (intuitively I don't think there's a solution if the mole can either move or stay put, but haven't really looked into it yet):
If the holes are numbered 1,2,3,4,5 use this pattern: 3,2,2,3,4,4,3,2

e: oops, made a mistake, must think again

e2: no I didn't (I hope), but the first step can be omitted: 2,2,3,4,4,3,2 (or 4,4,3,2,2,3,4)

tj86430 · Post by **tj86430** » Sat Jun 15, 2013 6:08 am

opex wrote:
tj86430 wrote:
drmwc wrote:There is a mole, who lives in a hole. You like eating moles, so you want to catch the mole. There are 5 entrances to the hole, which are arranged in a line.

Once a day, you look through a hole. If the mole is directly underneath you, you capture the mole. Othewrise, the mole goes free for the day. Ovenight, the mole moves exactly one hole away from its current position to a new hole.

What strategy guarantees capturing the mole?

Assuming, that the mole must move (intuitively I don't think there's a solution if the mole can either move or stay put, but haven't really looked into it yet):
If the holes are numbered 1,2,3,4,5 use this pattern: 3,2,2,3,4,4,3,2

e: oops, made a mistake, must think again

e2: no I didn't (I hope), but the first step can be omitted: 2,2,3,4,4,3,2 (or 4,4,3,2,2,3,4)
I'd omit one more step as well: 2,3,4,4,3,2

Magicwand · Post by **Magicwand** » Sat Jun 15, 2013 8:09 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 8; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

drmwc · Post by **drmwc** » Sat Jun 15, 2013 10:19 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 9; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

My move is probably a little slack, but it makes very nice aji and I am way ahead. I the game were closer, I would play more actively. One possible idea that is:

Click Here To Show Diagram Code: [go]$$Bc risky $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . . . | $$ | . . O . O X X . X . . O . X X . 6 8 . | $$ | . . . O . X O X X . X 7 X . . X 4 5 . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O . | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O b O X . . . . . | $$ | . . . . . . . . . . . 2 1 3 . . . . . | $$ ---------------------------------------[/go]

Atari as above is a little risky - W will fight a ko which is risky for B. W has more ko threats. After the move 145 as played W may need to answer 1 at b since it becomes more a flower viewing ko for me.

Following the atari, if I connect at 3 (eventually) W may cut at 4 and the sequence shown follows. Then I believe 8 is gote for W, so the whole sequence may be playable, But I may have overlooked something.

Suppose I had played this move:

Click Here To Show Diagram Code: [go]$$Bc risky $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . . . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . . . | $$ | . . O . O X X . X . . O . X X . 1 . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . 4 2 3 . . . . | $$ ---------------------------------------[/go]

This gets more points on the RHS. However, W gains around 4 points in double sente from the hane at 2 becoming sente.

So although my move is slack, given the 4 points in double sente, it's not that slack. And there is not need for me to take any chances. I don't really see where W has aji that could win after this.

Click Here To Show Diagram Code: [go]$$Bc W's only chance? $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . 7 X X O X O O X . . . . . . . | $$ | . O O O 5 4 6 O X X X . . . . . X . . | $$ | . X 2 . 8 X . O O . . . X . X . . . . | $$ | . 3 X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . . . | $$ | . . O . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 1 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White 2 above is a weak threat against some central stones. But I can answer 4 at 6 rather 5, and all is well. Other than that, the board is played out.

Magicwand · Post by **Magicwand** » Sat Jun 15, 2013 5:46 pm

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 9; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . . . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . 6 . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

drmwc · Post by **drmwc** » Sun Jun 16, 2013 3:30 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 9; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . 7 . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . 6 . . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Descending at first glance appears to be better yose.

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . 0 . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . 6 X 4 . | $$ | . . . . . X X O X O O X . . . . 7 5 . | $$ | . O O O . . . O X X X . . . . 8 X 1 . | $$ | . X . . . X . O O . . . X . X 9 O 2 . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . . . | $$ | . . O . O X X . X . . O . X X . . 3 . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

However, W' blosk at 2 appears to be sente. Suppose I ignore it, then W can start operations in the corner as shown. Next, B wants to cut off W 8 but this is an overplay:

Click Here To Show Diagram Code: [go]$$Bcm11 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . 7 6 8 . | $$ | . . . O . X O O O . . X . . . X 1 O . | $$ | . . . O O O X O . , O X . . . X O 2 . | $$ | . . . . X O X O O O X X . . . O X O 4 | $$ | . . . . . X X O X O O X . . . 3 X X . | $$ | . O O O . . . O X X X . . . 5 O X X . | $$ | . X . . . X . O O . . . X . X X O O . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . . . | $$ | . . O . O X X . X . . O . X X . . X . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

B needs 13 to avoid collapse. W 14 threatens to link underneath. So W lives up to 18.

I can avoid this in a number of ways:

Play differently at the first move

Don't play tenuki at 3 an tlet W kosumi at q8

don't cut W at move 9

I've gone for the first option, since it's the cleanest. Next:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . 1 . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . O 3 7 | $$ | . . X . . . X X O . O O X . . O . 4 5 | $$ | . . X , X X . . X O O . O O . , . . 6 | $$ | . X O . X . . X . X X O X O . O . 8 . | $$ | . . O . O X X . X . . O . X X . 2 . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . 9 X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

W 2 is big, but I can play some sente yose and get the last big point at 9 with my lead intact.The move 1 as played effectively makes miai of 2 and 3 in diagram above.

Magicwand · Post by **Magicwand** » Sun Jun 16, 2013 8:15 am

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 9; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . 7 . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X . 6 8 . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

drmwc · Post by **drmwc** » Sun Jun 16, 2013 3:43 pm

Click Here To Show Diagram Code: [go]$$Bcm141 B has captured 9; W has captured 3 $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . . . . 7 . | $$ | . O O O . . . O X X X . . . . . X . . | $$ | . X . . . X . O O . . . X . X 9 6 8 . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . 1 O . X . . X . X X O X O . O . . . | $$ | . . 2 . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O 5 | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . 3 . 4 . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

another safety first move.

Black 1 below looks more appealing:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . 5 X . . | $$ | . . . . . X X O X O O X . . . 4 . X . | $$ | . O O O . . . O X X X 8 . 6 . 2 X . . | $$ | . X . . . X . O O . . . X 7 X 3 O O . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . x O . X . . X . X X O X O . O . 1 . | $$ | . . O . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White will cut at 2. If I cut the stone off, 4 threaens some ataris and so 5 is a natural defence. however, 6 is now very strong since it threatens the cut at 8.

I can avoid this line, for example:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . 7 X a . | $$ | . . . . . X X O X O O X . . 5 4 6 X . | $$ | . O O O . . . O X X X . . . 9 2 X 8 . | $$ | . X . . . X . O O . . . X . X 3 O O . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . X O . X . . X . X X O X O . O . 1 . | $$ | . . O . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

5 is a nice move which protects the cut. Then I can squeeze white. However, W's incursion is quite big and after W connects, I will porbably need to connect at a. Hence I prefer to avoid the problems at the outset.

Another plan is to go for a trade:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . 5 X . . | $$ | . . . . . X X O X O O X . . . 4 . X . | $$ | . O O O . . . O X X X 8 9 6 . 2 X . . | $$ | . X . . . X . O O . . 0 X . X 3 O O . | $$ | . . X . . . X X O . O O X . 7 O b . . | $$ | . . X , X X . . X O O . O O . a . . . | $$ | . x O . X . . X . X X O X O . O . 1 . | $$ | . . O . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

B atari at a or b will follow this. It seems playable for B, but it has some risks and I may have misread.

The final idea is not to cut at 3 initially:

Click Here To Show Diagram Code: [go]$$Bc $$ --------------------------------------- $$ | . . . . O O X X . . . . . . . . . . . | $$ | . . . . . X O O X X . . . . . . . . . | $$ | . . . O . X O O O . . X . . . X . . . | $$ | . . . O O O X O . , O X . . . X O . . | $$ | . . . . X O X O O O X X . . . . X . . | $$ | . . . . . X X O X O O X . . 3 . . X . | $$ | . O O O . . . O X X X . . 4 . 2 X . . | $$ | . X . . . X . O O . . . X . X . O O . | $$ | . . X . . . X X O . O O X . . O . . . | $$ | . . X , X X . . X O O . O O . , . . . | $$ | . x O . X . . X . X X O X O . O . 1 . | $$ | . . O . O X X . X . . O . X X . . . . | $$ | . . . O . X O X X . X . X . . X . . . | $$ | . . O . O . O . O . O O . . O O X X . | $$ | . . . X O . O . . . . . O O . O X O X | $$ | . . O O X X . . O , X O X X O O O X . | $$ | . . O X . X . . . . . O X X X X X . . | $$ | . . X . X . . . X . O . O X . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This may be similar to the squeeze line above, alhtough 4 may activate the cut so it may not work for B.

Magicwand · Post by **Magicwand** » Mon Jun 17, 2013 1:37 am

Life In 19x19

magicwand versus drmwc

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Re: magicwand versus drmwc

Re: magicwand versus drmwc