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Problem Display

PID: 67809 (8/8/3p2N1/1Q1Pp3/r2k4/1B6/3PK3/8 w - - 0 1)

Lewis, Robert Tony

Phenix, 1999

8/8/3p2N1/1Q1Pp3/r2k4/1B6/3PK3/8

#2

6 + 4

SOLUTION

SOUND
Sets
- 1...Ke4
  - 2.Qd3#
- 1...Ra1
  - 2.Qc4#
  - 2.Qb4#
- 1...Ra2
  - 2.Qc4#
  - 2.Qb4#
- 1...Ra3
  - 2.Qc4#
  - 2.Qb4#
- 1...Rb4
  - 2.Qxb4#
- 1...Rc4
  - 2.Qxc4#
- 1...Ra5
  - 2.Qc4#
  - 2.Qb4#
- 1...Ra6
  - 2.Qc4#
  - 2.Qb4#
- 1...Ra7
  - 2.Qc4#
  - 2.Qb4#
- 1...Ra8
  - 2.Qc4#
  - 2.Qb4#
- 1...e4
  - 2.Qb6#
Tries
- 1.Sh4?
  - 1...Ke4
    - 2.Qxa4#
  - 1...Rb4
    - 2.Qxb4#
  - 1...Ra1
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra2
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra3
    - 2.Qc4#
    - 2.Qb4#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Ra5
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra6
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra7
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra8
    - 2.Qc4#
    - 2.Qb4#
  - 1...e4!
- 1.Ba2?
  - 1...Ke4
    - 2.Qd3#
  - 1...e4
    - 2.Qb6#
  - 1...Ra3
    - 2.Qc4#
    - 2.Qb4#
  - 1...Rb4
    - 2.Qxb4#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Ra5
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra6
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra7
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra8
    - 2.Qc4#
    - 2.Qb4#
  - 1...Rxa2!
- 1.Bxa4?
  - 1...Ke4
    - 2.Qd3#
  - 1...e4!
Keys
- 1.Se7!
  - 1...Ke4
    - 2.Qxa4#
  - 1...Rb4
    - 2.Qxb4#
  - 1...Ra1
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra2
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra3
    - 2.Qc4#
    - 2.Qb4#
  - 1...Rc4
    - 2.Qxc4#
  - 1...Ra5
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra6
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra7
    - 2.Qc4#
    - 2.Qb4#
  - 1...Ra8
    - 2.Qc4#
    - 2.Qb4#
  - 1...e4
    - 2.Sc6#

FEATURES

Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
Sets
- K(b);P-FLIGHT::QAB1(D)
- R(a);N_GUARD::QAR2(D),XR(a)
- R(a);N_GUARD::QAR1(D),XR(a)
- P(c);SBLOCK::QAB(D)
Tries
- Try
  - S(F);
  - Vars
    - K(b);P-FLIGHT::QAR(D),XR(a)
    - R(a);N_GUARD::QAR2(D),XR(a)
    - R(a);N_GUARD::QAR1(D),XR(a)
  - Refutation
    - P(c);
- Try
  - B(C);
  - Vars
    - K(b);P-FLIGHT::QAB1(D)
    - P(c);SBLOCK::QAB(D)
    - R(a);N_GUARD::QAR2(D),XR(a)
    - R(a);N_GUARD::QAR1(D),XR(a)
  - Refutation
    - R(a);P_PINP(A),XB(C)
- Try
  - B(C);XR(a)
  - Vars
    - K(b);P-FLIGHT::QAB1(D)
  - Refutation
    - P(c);
Actual
- S(F);
- Vars
  - K(b);P-FLIGHT::QAR(D),XR(a)
  - R(a);N_GUARD::QAR2(D),XR(a)
  - R(a);N_GUARD::QAR1(D),XR(a)
  - P(c);SBLOCK::S(F)

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