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Problem Display

PID: 8016 (1R4Q1/8/1N6/kPn5/1pB5/8/8/7K w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

1R4Q1/8/1N6/kPn5/1pB5/8/8/7K

#2

6 + 3

SOLUTION

SOUND
Tries
- 1.Ra8+?
  - 1...Sa6
    - 2.Rxa6#
  - 1...Kxb6!
- 1.Qd5?
  - 1...b3
    - 2.Qd2#
  - 1...Sb3
    - 2.Qa8#
  - 1...Sd3
    - 2.Qa8#
  - 1...Sa4
    - 2.Qa8#
  - 1...Se4
    - 2.Qa8#
  - 1...Sa6
    - 2.bxa6#
  - 1...Se6
    - 2.Qa8#
  - 1...Sd7
    - 2.Qa8#
  - 1...Sb7!
- 1.Qg2?
  - 1...b3
    - 2.Qd2#
  - 1...Sa6
    - 2.Qa2#
  - 1...Sb3
    - 2.Qa8#
    - 2.Qa2#
  - 1...Sd3
    - 2.Qa8#
    - 2.Qa2#
  - 1...Sa4
    - 2.Qa8#
  - 1...Se4
    - 2.Qa2#
  - 1...Se6
    - 2.Qa8#
    - 2.Qa2#
  - 1...Sd7
    - 2.Qa8#
    - 2.Qa2#
  - 1...Sb7!
- 1.Qg7?
  - 1...b3
    - 2.Qc3#
  - 1...Sa6
    - 2.Qa1#
  - 1...Sb3
    - 2.Qa7#
  - 1...Sd3
    - 2.Qa1#
    - 2.Qa7#
  - 1...Sa4
    - 2.Qa7#
  - 1...Se4
    - 2.Qa1#
    - 2.Qa7#
  - 1...Se6
    - 2.Qa1#
    - 2.Qa7#
  - 1...Sd7
    - 2.Qa1#
  - 1...Sb7!
- 1.Qd8?
  - 1...b3
    - 2.Qd2#
  - 1...Sb3
    - 2.Ra8#
  - 1...Sd3
    - 2.Ra8#
  - 1...Sa4
    - 2.Ra8#
  - 1...Se4
    - 2.Ra8#
  - 1...Se6
    - 2.Ra8#
  - 1...Sb7
    - 2.Ra8#
  - 1...Sd7
    - 2.Ra8#
  - 1...Sa6!
Keys
- 1.Qg1!
  - 1...b3
    - 2.Qe1#
  - 1...Sa6
    - 2.Qa1#
  - 1...Sb3
    - 2.Ra8#
  - 1...Sd3
    - 2.Ra8#
    - 2.Qa1#
  - 1...Sa4
    - 2.Ra8#
  - 1...Se4
    - 2.Ra8#
    - 2.Qa1#
  - 1...Se6
    - 2.Ra8#
    - 2.Qa1#
  - 1...Sb7
    - 2.Ra8#
  - 1...Sd7
    - 2.Ra8#
    - 2.Qa1#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
Sets
Tries
- Try
  - R(E);CHECK
  - Vars
    - S(c);N_GUARD,P_SPINS(c)::R1(E),XS(c)
  - Refutation
    - K(b);S_FLIGHT,XS(D)
- Try
  - Q(F);
  - Vars
    - P(a);OGATEB::QAB(F)
    - S(c);N_GUARD::QAR(F)
    - S(c);OGATE::QAR(F)+P(C),XS(c)
  - Refutation
    - S(c);
- Try
  - Q(F);
  - Vars
    - P(a);OGATEB::QAB(F)
    - S(c);N_GUARD::QAR(F)
  - Refutation
    - S(c);
- Try
  - Q(F);
  - Vars
    - P(a);OGATEB::QAB(F)
    - S(c);N_GUARD::QAR(F)
    - S(c);N_GUARD::QAR2(F)
  - Refutation
    - S(c);
- Try
  - Q(F);
  - Vars
    - P(a);OGATEB::QAB(F)
    - S(c);N_GUARD::R(E)
  - Refutation
    - S(c);
Actual
- Q(F);
- Vars
  - P(a);OGATEB::QAB(F)
  - S(c);N_GUARD::QAR(F)
  - S(c);N_GUARD::R(E)

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