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Problem Display

PID: 232815 (6rQ/6PP/4N3/2P1k3/p4R2/p7/B7/K7 w - - 0 1)

Kichigin, Viktor Vladimirovich

Freie Presse, 1988

6rQ/6PP/4N3/2P1k3/p4R2/p7/B7/K7

#2

8 + 4

15148	Sadier Collection	2021

SOLUTION

SOUND
Sets
- 1...Rxg7
  - 2.Qxg7#
- 1...Ra8
  - 2.g8Q#
  - 2.g8S#
  - 2.g8B#
  - 2.g8R#
- 1...Rb8
  - 2.Qxb8#
  - 2.g8Q#
  - 2.g8S#
  - 2.g8B#
  - 2.g8R#
- 1...Rc8
  - 2.g8Q#
  - 2.g8S#
  - 2.g8B#
  - 2.g8R#
- 1...Rd8
  - 2.g8Q#
  - 2.g8S#
  - 2.g8B#
  - 2.g8R#
- 1...Re8
  - 2.g8Q#
  - 2.g8S#
  - 2.g8B#
  - 2.g8R#
- 1...Rf8
  - 2.gxf8Q#
  - 2.gxf8S#
  - 2.gxf8B#
  - 2.gxf8R#
- 1...Rxh8
  - 2.gxh8Q#
  - 2.gxh8B#
Tries
- 1.Sf8?
  - threat
    - 2.Sg6#
  - 1...Rxf8
    - 2.gxf8Q#
    - 2.gxf8R#
  - 1...Kxf4!
- 1.Bc4?
  - 1...Rxg7
    - 2.Qxg7#
  - 1...Rxh8
    - 2.gxh8Q#
    - 2.gxh8B#
  - 1...Ra8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rb8
    - 2.Qxb8#
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rc8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rd8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Re8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rf8
    - 2.gxf8Q#
    - 2.gxf8S#
    - 2.gxf8B#
    - 2.gxf8R#
  - 1...a2!
Keys
- 1.Kb1!
  - 1...Rb8+
    - 2.Qxb8#
  - 1...Rxg7
    - 2.Qxg7#
  - 1...Rxh8
    - 2.gxh8Q#
    - 2.gxh8B#
  - 1...Ra8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rc8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rd8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Re8
    - 2.g8Q#
    - 2.g8S#
    - 2.g8B#
    - 2.g8R#
  - 1...Rf8
    - 2.gxf8Q#
    - 2.gxf8S#
    - 2.gxf8B#
    - 2.gxf8R#

FEATURES

Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
Sets
- R(d);OGATE,P_SPINR(d),XP(F)::QAB(H),XR(d)
- R(d);OGATE,XQ(H)::PXR(d)=Q
Tries
- Try
  - S(E);
  - Threat
    - S(E)
  - Vars
    - R(d);OGATE,XS(E)::PXR(d)=Q
  - Refutation
    - K(c);S_FLIGHT,XR(C)
- Try
  - B(B);
  - Vars
    - R(d);OGATE,P_SPINR(d),XP(F)::QAB(H),XR(d)
    - R(d);OGATE,XQ(H)::PXR(d)=Q
  - Refutation
    - P(a);
Actual
- K(A);P-FLIGHT
- Vars
  - R(d);CHECK,OGATE::QAB(H),XR(d)
  - R(d);OGATE,P_SPINR(d),XP(F)::QAB(H),XR(d)
  - R(d);OGATE,XQ(H)::PXR(d)=Q

Developed and maintained by Brian Stephenson.
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