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Subject: Re: IQ debugging and some tough positions ...

Author: Slater Wold

Date: 17:59:15 07/29/02

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On July 29, 2002 at 20:35:24, Slater Wold wrote:

>On July 29, 2002 at 15:30:55, Jim Monaghan wrote:
>
>>[D]4k3/pp2pp2/4n1p1/3RP1P1/2r1N3/P1P5/1P2q3/1K5Q w - - bm Nc5; id "IQ.1081";
>>Dzhindzhikhashvili-Tukmakov, Leningrad 1971
>>1. Nc5!! Rf4 (1... Rxc5 2. Qh8+ Nf8 3. Rxc5) 2. Qh8+ Nf8 3. Rd8+! Kxd8 4. Qf8+
>>Kc7 5. Qxe7+ Kc6 6. Qxb7+ (1-0)
>
>Not sure about this one.
>
>Deep Junior 7 - W,S
>4k3/pp2pp2/4n1p1/3RP1P1/2r1N3/P1P5/1P2q3/1K5Q w - - 0 1
>
>Analysis by Deep Junior 7:
>
>1.Nd6+ exd6 2.Qh8+ Kd7 3.exd6
>  ³  (-0.45)   Depth: 3   00:00:00
>1.Nd2 Rc8 2.Qh8+ Nf8 3.Qg8
>  ±  (0.88)   Depth: 3   00:00:00
>1.Nd2 Rc8 2.Qh8+ Nf8 3.Qg8
>  ±  (0.88)   Depth: 3   00:00:00
>1.Nd2 Rc8 2.Qh8+ Nf8 3.Kc2 Qe1
>  ²  (0.45)   Depth: 6   00:00:00  5kN
>1.Qh8+ Nf8 2.Nc5 Qf1+ 3.Ka2 Qc1 4.Nxb7
>  ²  (0.65)   Depth: 6   00:00:00  11kN
>1.Nc5 Qf2 2.Qh8+ Nf8 3.Nxb7 Qg1+ 4.Ka2 Qc1
>  ±  (0.92)   Depth: 6   00:00:00  17kN
>1.Nc5 Qh5 2.Qxh5 gxh5 3.Nxe6 fxe6 4.Rb5 b6 5.g6
>  ²  (0.51)   Depth: 9   00:00:00  134kN
>1.Qh8+ Nf8 2.Nc5 a5 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Qd6+ Kb5 7.Nxb7
>  ±  (1.05)   Depth: 9   00:00:00  163kN
>1.Qh8+ Nf8
>  ±  (0.75)   Depth: 12   00:00:00  1653kN
>1.Qh8+ Nf8 2.Nf6+ exf6 3.Rd8+ Kxd8 4.Qxf8+ Kd7 5.Qd6+ Kc8 6.Qf8+
>  =  (0.00)   Depth: 15   00:00:16  44336kN
>1.Nc5 Qh5
>  =  (-0.10)   Depth: 15   00:00:22  44336kN
>1.Nd2 Rg4 2.Qh8+ Nf8
>  =  (0.20)   Depth: 15   00:00:33  55358kN
>1.Nd2 Rg4 2.Qh8+ Nf8 3.Rc5 Qd3+ 4.Ka2 Qd7 5.c4 Rg2 6.Nb3 b6 7.Rd5 Qf5 8.Nd2 Qxg5
>9.e6 f5 10.Nb3
>  =  (0.04)   Depth: 18   00:01:35  247940kN
>1.Nd2 Rg4 2.Qh8+ Nf8 3.Rc5 Rg1+ 4.Ka2 Qxd2 5.Rc8+ Kd7 6.Qxf8 Qd5+ 7.c4 Qe4
>8.Qd8+ Ke6 9.Rc7 Kf5 10.Qxe7
>  =  (0.15)   Depth: 20   00:08:46  1433578kN, tb=12
>
>(W,  29.07.2002)

Ra4 is *clearly* an inferior move to Qh5 after Nc5.

After Nc5 Qh5:

W,S - Deep Junior 7
4k3/pp2pp2/4n1p1/2NRP1P1/2r5/P1P5/1P2q3/1K5Q b - - 0 1

Analysis by Deep Junior 7:

1...Nxc5 2.Qh8#
  +-  (#2)   Depth: 3   00:00:00
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5
  ²  (0.45)   Depth: 6   00:00:00  1kN
1...Qh5 2.Qxh5 gxh5 3.Nxe6 fxe6 4.Rd4 Rxd4 5.cxd4 Kf7 6.Kc2 Kg6
  ²  (0.32)   Depth: 9   00:00:00  55kN
1...Qh5 2.Qxh5 gxh5 3.g6 Rg4 4.gxf7+
  =  (0.20)   Depth: 12   00:00:00  1017kN
1...Qh5!
  =  (-0.10)   Depth: 15   00:00:10  25379kN
1...Qh5 2.Qxh5 gxh5 3.g6 h4 4.gxf7+ Kxf7 5.Nxb7 h3 6.Rd2 Rh4 7.Rh2 Kg6 8.Kc2 Kf5
  ³  (-0.32)   Depth: 17   00:00:49  125432kN
1...Qh5 2.Qxh5 gxh5 3.g6 h4 4.gxf7+ Kxf7 5.Nxb7 h3 6.Rd2 Rg4 7.Rh2 Nf4 8.Nd8+
Ke8 9.Nc6 Rg1+ 10.Ka2 Rg2
  ³  (-0.50)   Depth: 19   00:03:44  623336kN, tb=5
1...Qh5 2.Qxh5 gxh5 3.g6 h4 4.gxf7+ Kxf7 5.Nxb7 h3 6.Rd2 Rg4 7.Rh2 Nf4 8.Nd8+
Ke8 9.Nc6 Rg1+ 10.Ka2 Rg2
  ³  (-0.50)   Depth: 19   00:03:54  641092kN, tb=5

(W,  29.07.2002)


After Nc5 Rf4:

W,S - Deep Junior 7
4k3/pp2pp2/4n1p1/2NRP1P1/5r2/P1P5/1P2q3/1K5Q w - - 0 1

Analysis by Deep Junior 7:

2.Nxe6 Rf1+ 3.Qxf1 Qxf1+ 4.Kc2 fxe6
  -+  (-2.64)   Depth: 3   00:00:00
2.Qh8+ Nf8 3.Rd7
  ±  (1.28)   Depth: 3   00:00:00  1kN
2.Qh8+ Nf8 3.Rd7
  ±  (1.28)   Depth: 3   00:00:00  1kN
2.Qh8+ Nf8 3.Rd7
  ±  (1.28)   Depth: 3   00:00:00  1kN
2.Qh8+ Nf8 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Ka2
  ±  (0.92)   Depth: 6   00:00:00  19kN
2.Qh8+!
  ±  (1.22)   Depth: 8   00:00:00  30kN
2.Qh8+! Nf8 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Qxb7+ Kxc5 7.b4+ Kc4 8.Qa6+
Kxc3 9.Qxe2
  +-  (3.52)   Depth: 8   00:00:00  42kN
2.Qh8+ Nf8 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Qxb7+ Kxc5 7.b4+ Kc4 8.Qa6+
Kxc3 9.Qxe2 Kd4 10.Qb2+ Kd5 11.Qc3
  +-  (3.54)   Depth: 11   00:00:00  307kN
2.Qh8+ Nf8 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Qxb7+ Kxc5 7.b4+ Kc4 8.Qa6+
Kxc3 9.Qxe2 Kd4 10.Qa6 Kxe5 11.Qxa7
  +-  (3.35)   Depth: 14   00:00:01  3831kN
2.Qh8+!
  +-  (3.65)   Depth: 17   00:00:04  8983kN
2.Qh8+!
  +-  (3.95)   Depth: 19   00:00:39  99511kN, tb=7
2.Qh8+! Nf8 3.Rd8+ Kxd8 4.Qxf8+ Kc7 5.Qxe7+ Kc6 6.Qxb7+ Kxc5 7.b4+ Kc4 8.Qa6+
Kxc3 9.Qxe2 Kd4 10.e6 fxe6 11.Qxe6
  +-  (4.30)   Depth: 19   00:01:15  198390kN, tb=643

(W,  29.07.2002)


You judge.



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