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Problem Display

PID: 164496 (k7/rqQ3K1/8/8/8/5B2/8/8 w - - 0 1)

Antipov, Viacheslav Pavlovich

Schach-WW, 1998

k7/rqQ3K1/8/8/8/5B2/8/8

#2

3 + 3

15148	Sadier Collection	2017

SOLUTION

SOUND
Sets
- 1...Ra1
  - 2.Qxb7#
- 1...Ra2
  - 2.Qxb7#
- 1...Ra3
  - 2.Qxb7#
- 1...Ra4
  - 2.Qxb7#
- 1...Ra5
  - 2.Qxb7#
- 1...Ra6
  - 2.Qxb7#
Tries
- 1.Kf8?
  - threat
    - 2.Qd8#
    - 2.Qc8#
  - 1...Ra1
    - 2.Qxb7#
  - 1...Ra2
    - 2.Qxb7#
  - 1...Ra3
    - 2.Qxb7#
  - 1...Ra4
    - 2.Qxb7#
  - 1...Ra5
    - 2.Qxb7#
  - 1...Ra6
    - 2.Qxb7#
  - 1...Qe4
    - 2.Qc8#
  - 1...Qd5
    - 2.Qc8#
  - 1...Qc6
    - 2.Qc8#
  - 1...Qxf3+!
- 1.Kg8?
  - threat
    - 2.Qd8#
    - 2.Qc8#
  - 1...Qxf3
    - 2.Qc8#
  - 1...Ra1
    - 2.Qxb7#
  - 1...Ra2
    - 2.Qxb7#
  - 1...Ra3
    - 2.Qxb7#
  - 1...Ra4
    - 2.Qxb7#
  - 1...Ra5
    - 2.Qxb7#
  - 1...Ra6
    - 2.Qxb7#
  - 1...Qe4
    - 2.Qc8#
  - 1...Qc6
    - 2.Qc8#
  - 1...Qd5+!
- 1.Bc6?
  - 1...Ra1
    - 2.Qxb7#
  - 1...Ra2
    - 2.Qxb7#
  - 1...Ra3
    - 2.Qxb7#
  - 1...Ra4
    - 2.Qxb7#
  - 1...Ra5
    - 2.Qxb7#
  - 1...Ra6
    - 2.Qxb7#
  - 1...Qxc6!
Keys
- 1.Kh8!
  - threat
    - 2.Qd8#
    - 2.Qc8#
  - 1...Qxf3
    - 2.Qc8#
  - 1...Ra1
    - 2.Qxb7#
  - 1...Ra2
    - 2.Qxb7#
  - 1...Ra3
    - 2.Qxb7#
  - 1...Ra4
    - 2.Qxb7#
  - 1...Ra5
    - 2.Qxb7#
  - 1...Ra6
    - 2.Qxb7#
  - 1...Qe4
    - 2.Qc8#
  - 1...Qd5
    - 2.Qc8#
  - 1...Qc6
    - 2.Qc8#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 0
Sets
- R(a);N_GUARD::QAB1(B),XQ(b)
Tries
- Try
  - K(C);N_SPINQ(B),S_FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - R(a);N_GUARD::QAB1(B),XQ(b)
    - Q(b);::QAR2(B)
  - Refutation
    - Q(b);CHECK,N_SPINQ(b),XB(A)
- Try
  - K(C);N_SPINQ(B),P-FLIGHT
  - Threat
    - DUALS(2)
  - Vars
    - Q(b);N_SPINQ(b),XB(A)::QAR2(B)
    - R(a);N_GUARD::QAB1(B),XQ(b)
    - Q(b);::QAR2(B)
  - Refutation
    - Q(b);CHECK
- Try
  - B(A);
  - Vars
    - R(a);N_GUARD::QAB1(B),XQ(b)
  - Refutation
    - Q(b);N_SPINQ(b),XB(A)
Actual
- K(C);N_SPINQ(B),S_FLIGHT
- Threat
  - DUALS(2)
- Vars
  - Q(b);N_SPINQ(b),XB(A)::QAR2(B)
  - R(a);N_GUARD::QAB1(B),XQ(b)
  - Q(b);::QAR2(B)

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