James A. Cook vs. Niall, December 2010

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Game information

Comments

Unfinished notes.

Move 26: Red is threatening two powerful moves: (J2) [I4] and (D8) [B12]. The B12 weakness of (D8) means that red can't connect (E6) to the bottom in one move. G6 

 - (K7) K6 (L6) L5 <(J7) I9> (L11 - pointless, as the ladder never gets that far now!) K12 
 - (F9 - aiming at (D8) B12 (D9) C13 (F11), and also at (G7) double peep) G8 
    - (F10) C9 [because (D8) is now a threat]
 - (D8) B12 - good for blue?
 - <(C9) D7> - good for blue?
 - (H4) I7 - gfb
 - (L10) K7 - gfb
 - (L11) L10

<F4 (E5)> G6 (D8) - <> exchange doesn't look like it helps E5 (F5) - because F2 has a weakness at (H2) F4 (F3) D5 (G3) H4 (G6) G5 (F6) F5 - blue wins H4 (G6) I7 (F8) 

 - F9 (G8) G10 (H10) H12 (H11) G12 (F10) - red connects (F8) to the bottom

H4 (D8) 

 - B12 (D9) C13 (F10) G11 - blue wins
 - E5 (F5) G2 (F3) F2 (D2) D3 (C3) D4 (C5) D5 (B7) - red wins

D7 (H5) I7 (F8) 

 - G6 (F7) F5 (E5) G2 (E3) - reds connection goes: {top->E3/E4/E5 -> F7/F8 -> bottom}
 - <...> F2 (?) D3 (C3) D4 (C5) D5 (B7) C9 (D8) D9 (E7) - red wins

D7 <(E7) D8> (I7) H4 (G6) F2 (D2) D3 (C3) D4 (C5) - now red can't connect if he has played (E7) F2 (D2) D3 (C3) H4 (G6) G5 (E7) C6 (D5) E5 (F5) F4 (H2) I1 (G2) G1 (F3) I7 (D8) B12 - now what? F2 (H2) H4

Move 24: <blah> denotes possibilty of exchanging blah C2 

 - (I7) F2 (H2) I1 (G2) G1
     - (B3) B2 (C3) <D5 (E4)> E1 (J2) I4 (I3) H4 (H3) G6 
         - (C9) D7 (E7 [G6->E8 ok]) D7 (B7) 
             - with       <D5 (E4)> get: B6 - BLUE wins
             - without <D5 (E4)> get: D5 (B6) D4 (D2) D1 (E2) F1 (E3) E5 (F5) - RED wins!
         - (D8) D9 (B10) B12 (B11) C13 - now blue wins as G11/F10 are miai
     - (J2) 
     - (D2) F4 (J2) 
     - (E4) E1 (J2) I4 (I3) H4 (H3) 
 - (J2) C9 (I7) I4 (H5) H4 (G5) F2 (D2) E4 (D5) E5 - red has no move, blue wins
 - (D2)

Close to repetition! From move 22 notes: I7 (C9 [B9 doesn't work with D11 because of E12]) C2 

 - (B3) B2 (C3) F2 (I4) I3 (D2) D5 (E5 [D4 weakness, so (E4)?]) D7 (E7) D8 (F8)

(note the K7) K6 (L6) L5 (J7) I9 sequence) 

- (D2) D7 (B7) C5, blue connects, red can play (F8), but looks like this works for blue? What if red plays (H4/G5/H5/I4), threatening  an attack around (J2) before (F8)? Well, blue can play at F7 and just connect to I7 and win.

I10 (C11 [threatens D8 connection]) C9 (I7) 

 - H4 (G6) G5 (E7) F2 (E4) D3 (C3), with C9 in place blue can run down the left
 - C2/F2?


Question: Does I7 connect E8 to the right edge? It's a series of double threats. Attacking the direct E8--> I7 connected: If red (F8) then blue walks up to I2, however this only connects by running down to J11. So can red attack the connection of E8 to the right edge by first attacking the direct route through I7 (eg. at (K7) or (L11)) and then playing (F8) having damaged the route down the RHS? Note* I was very worried, after playing move 22 that red would instead play at E10. This blocks E9-->I10 better than D11.

Move 22: 

                / F10 (G11) \

I10 (D11) I7 not needed (F8) F7 (G7) G6 (H6) G4 (B9) C2 [see below] 

                 \ G11 (F10) /
 - (B3) B2 (C3) F2 (I4) I3 (D2) D5 (E5 [D4 weakness, so (E4)?]) D7 (E7) D8 (F8) - blue *almost* wins here. The complication is J3, leading to a ladder down the right hand side, and the possibility of a double threat earlier. Something like (K7) K6 (L6) L5 (J7) I9. So it looks like it doesn't work for red.   
 - (D2) D7 (B7) C5, blue connects, red can play (F8), but looks like this works for blue? What if red plays (H4/G5/H5/I4), threatening  an attack around (J2) before (F8)? Well, blue can play at F7 and just connect to I7 and win.

I10 (C11 [threatens D8 connection]) C9 (I7) 

 - H4 (G6) G5 (E7) F2 (E4) D3 (C3), with C9 in place blue can run down the left
 - C2/F2?

I10 (I7) G11 (C11)

C11 (B12) D11 (B11) C9 (E10) C10 

 - (G11) 
 - (A10), and a ladder

C11 (D9 - cuts off E8 pieces fairly thoroughly) I10 (G11) C11 (B10) C9 (D11) - confusing...

D8s connection to both the top and the bottom? [E3/F2 - looking at C2? C2? - ignoring F2 too much?] H4 [protect against F2, sets up G6 related moves, like C9?] Can I get J5 in as a forcing move? J5 (J4) - looks bad for blue Red is in danger of playing J2 and chopping through the top. After red J2 blue can get to the E8 stones, but not to the left edge yet.

Move 20: D6 (C9? B7? D7? F4?) E4 (D5) C2 (D2) D6 (B7) C5 E4 (D5) C2 (B3) B2 (C3) F2 (D2) C9 (G11) F6 - looks good for blue E4 (D5) C2 (D2) D6 - seems to work for blue Red can pull out (J2) at any time - that looks like a big problem!

Problem is that if I play C9, red will play a testing move like (G8). If I play G7 red can play (I7) and I10 no longer threatens anything. So red can focus on the top, with something like (K4). Then when blue plays G11 red can answer at (E10), connecting to the bottom.

Move 18: E5 (F5) F2[say] (I4) I3 (B6) - looks good for red, F5 seems basically connected to top and bottom E5 (D6) D5 (B6) C7 (D8) C6 (B10) B8 - good for blue, red has no way to the top D5 (F4) - red seems to connect to the top and benefit substantially from this exchange. E4 (D5) G5 (B10) - good for red?

Move 14: C5? E8 (F8) F5 [looking at I4 and C5, or even D6, with E8?] E8 (F8) F7 (G7) G6 (H6) I4 - doesn't look like quite enough for blue? E8 (I7) H4 E10 (I7) I6 (J6) J5 (F8) F10 (G8) G11 (H11) - now (I7) forcing sequence connects red around to (F8)! - Bad for blue I7 (F8) D6 - doesn't connect to the left, can that be ok? F11 (D10) - goes badly for blue when red [later] plays E11

Move 12: Should arguably have been at J3, as this still connects with J11. Should always stretch as much as you can (Jonatan Rydh)

Move 10: I8?

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