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Problem Display

PID: 218433 (7Q/5K2/3p3B/3np3/4R1N1/3B1k1p/3P2br/5NRn w - - 0 1)

Uris, Miguel

BCPS Website, 2020

7Q/5K2/3p3B/3np3/4R1N1/3B1k1p/3P2br/5NRn

#2

9 + 8

SOLUTION

SOUND
Sets
- 1...Sf2
  - 2.Sgxh2#
- 1...Sg3
  - 2.Sfxh2#
- 1...Sc3
  - 2.Qf6#
- 1...Sb4
  - 2.Qf6#
- 1...Sb6
  - 2.Qf6#
- 1...Sf6
  - 2.Qxf6#
- 1...Sc7
  - 2.Qf6#
Tries
- 1.Qg7?
  - 1...Sf2
    - 2.Sgxh2#
  - 1...Sg3
    - 2.Sfxh2#
  - 1...Sc3
    - 2.Re3#
    - 2.Qf6#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sb4
    - 2.Re3#
    - 2.Qf6#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
    - 2.Qf6#
  - 1...Sf6
    - 2.Re3#
    - 2.Qxf6#
  - 1...Sc7
    - 2.Re3#
    - 2.Qf6#
  - 1...Se7
    - 2.Re3#
  - 1...Bxf1!
- 1.Qc8?
  - 1...Sf2
    - 2.Sgxh2#
  - 1...Sg3
    - 2.Sfxh2#
  - 1...Sc3
    - 2.Re3#
    - 2.Qf5#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sb4
    - 2.Re3#
    - 2.Qf5#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
    - 2.Qf5#
  - 1...Sf6
    - 2.Re3#
    - 2.Qf5#
  - 1...Sc7
    - 2.Re3#
    - 2.Qf5#
  - 1...Se7
    - 2.Re3#
  - 1...Bxf1!
- 1.Qg8?
  - 1...Sf2
    - 2.Sgxh2#
  - 1...Sg3
    - 2.Sfxh2#
  - 1...Sc3
    - 2.Re3#
  - 1...Se3
    - 2.Rxe3#
  - 1...Sb4
    - 2.Re3#
  - 1...Sf4
    - 2.Re3#
  - 1...Sb6
    - 2.Re3#
  - 1...Sf6
    - 2.Re3#
  - 1...Sc7
    - 2.Re3#
  - 1...Se7
    - 2.Re3#
  - 1...Bxf1!
Keys
- 1.Qa8!
  - 1...Bxf1
    - 2.Re3#
  - 1...Sf4
    - 2.Rxf4#
  - 1...Sf2
    - 2.Sgxh2#
  - 1...Sg3
    - 2.Sfxh2#
  - 1...Sc3
    - 2.Rf4#
  - 1...Se3
    - 2.Rf4#
  - 1...Sb4
    - 2.Be2#
    - 2.Rf4#
  - 1...Sb6
    - 2.Be2#
    - 2.Rf4#
  - 1...Sf6
    - 2.Be2#
    - 2.Rf4#
  - 1...Sc7
    - 2.Be2#
    - 2.Rf4#
  - 1...Se7
    - 2.Be2#
    - 2.Rf4#

This is a version of 218432

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 4
Sets
- S(a);SBLOCK::S(F),XR(c)
- S(a);SBLOCK::S(A),XR(c)
- S(f);N_GUARD::QAR(I)
- S(f);N_GUARD::QAR(I),XS(f)
Tries
- Try
  - Q(I);
  - Vars
    - S(a);SBLOCK::S(F),XR(c)
    - S(a);SBLOCK::S(A),XR(c)
    - S(f);N_GUARD::R1(E),XS(f)
    - S(f);N_GUARD::R1(E)
  - Refutation
    - B(b);XS(A)
- Try
  - Q(I);
  - Vars
    - S(a);SBLOCK::S(F),XR(c)
    - S(a);SBLOCK::S(A),XR(c)
    - S(f);N_GUARD::R1(E),XS(f)
    - S(f);N_GUARD::R1(E)
  - Refutation
    - B(b);XS(A)
- Try
  - Q(I);
  - Vars
    - S(a);SBLOCK::S(F),XR(c)
    - S(a);SBLOCK::S(A),XR(c)
    - S(f);N_GUARD::R1(E)
    - S(f);N_GUARD::R1(E),XS(f)
  - Refutation
    - B(b);XS(A)
Actual
- Q(I);
- Vars
  - B(b);XS(A)::R1(E)
  - S(f);::QAB(I)+R(E),DCHECK,XS(f)
  - S(a);SBLOCK::S(F),XR(c)
  - S(a);SBLOCK::S(A),XR(c)
  - S(f);::QAB(I)+R(E),DCHECK

Developed and maintained by Brian Stephenson.
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