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Problem Display

PID: 106002 (8/5Q2/N2npP2/1p6/1pp5/2k5/3R4/2N1K3 w - - 0 1)

Melekhov, N

Intelectualie Egri, 1992

8/5Q2/N2npP2/1p6/1pp5/2k5/3R4/2N1K3

#2

6 + 6

6490	yacpdb	2009

SOLUTION

SOUND
Sets
- 1...b3
  - 2.Se2#
Tries
- 1.Sc7?
  - 1...Sxf7
    - 2.Sxb5#
  - 1...Se4
    - 2.Sxb5#
  - 1...Sf5
    - 2.Sxb5#
  - 1...Sb7
    - 2.Sxb5#
  - 1...Sc8
    - 2.Sxb5#
  - 1...Se8
    - 2.Sxb5#
  - 1...e5
    - 2.Sd5#
  - 1...b3!
- 1.Qh5?
  - threat
    - 2.Qf3#
    - 2.Qh3#
    - 2.Qe5#
  - 1...Se4
    - 2.Qf3#
    - 2.Qe5#
  - 1...Sf7
    - 2.Qf3#
    - 2.Qh3#
  - 1...e5
    - 2.Qf3#
    - 2.Qh3#
    - 2.Qxe5#
  - 1...Sf5!
- 1.Qxe6?
  - threat
    - 2.Qh3#
    - 2.Qe3#
    - 2.Qe5#
  - 1...Se4
    - 2.Qe5#
  - 1...Sf7
    - 2.Qh3#
    - 2.Qe3#
  - 1...Sf5!
- 1.Qa7?
  - threat
    - 2.Qe3#
    - 2.Qd4#
  - 1...e5
    - 2.Qe3#
  - 1...Sf5!
- 1.Qd7?
  - 1...Se4
    - 2.Qd4#
  - 1...Sb7
    - 2.Qd4#
  - 1...Sf7
    - 2.Qd4#
  - 1...Sc8
    - 2.Qd4#
  - 1...Se8
    - 2.Qd4#
  - 1...b3
    - 2.Se2#
  - 1...e5
    - 2.Qh3#
  - 1...Sf5!
- 1.Qf8?
  - 1...Sf5
    - 2.Qxb4#
  - 1...Se4
    - 2.Qxb4#
  - 1...Sb7
    - 2.Qxb4#
  - 1...Sf7
    - 2.Qxb4#
  - 1...Sc8
    - 2.Qxb4#
  - 1...Se8
    - 2.Qxb4#
  - 1...b3
    - 2.Se2#
  - 1...e5!
Keys
- 1.Qe7!
  - 1...Sf5
    - 2.Qxb4#
  - 1...Se4
    - 2.Qxb4#
  - 1...Sb7
    - 2.Qxb4#
  - 1...Sf7
    - 2.Qxb4#
  - 1...Sc8
    - 2.Qxb4#
  - 1...Se8
    - 2.Qxb4#
  - 1...b3
    - 2.Se2#
  - 1...e5
    - 2.Qxe5#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 0
Sets
- P(b);SBLOCK::S(A)
Tries
- Try
  - S(D);
  - Vars
    - S(e);N_GUARD,XQ(F)::S(D),XP(d)
    - S(e);N_GUARD::S(D),XP(d)
    - P(f);N_GUARD::S(D)
  - Refutation
    - P(b);
- Try
  - Q(F);
  - Threat
    - DUALS(3)
  - Refutation
    - S(e);
- Try
  - Q(F);XP(f)
  - Threat
    - DUALS(3)
  - Vars
    - S(e);::QAB(F)
  - Refutation
    - S(e);
- Try
  - Q(F);
  - Threat
    - DUALS(2)
  - Vars
    - P(f);::QAR2(F)
  - Refutation
    - S(e);
- Try
  - Q(F);
  - Vars
    - S(e);OGATE::QAB1(F)
    - P(b);SBLOCK::S(A)
    - P(f);OGATE::QAR(F)
  - Refutation
    - S(e);
- Try
  - Q(F);
  - Vars
    - S(e);OGATE::QAB1(F),XP(b)
    - P(b);SBLOCK::S(A)
  - Refutation
    - P(f);
Actual
- Q(F);
- Vars
  - S(e);OGATE::QAB1(F),XP(b)
  - P(b);SBLOCK::S(A)
  - P(f);OGATE::QAB(F),XP(f)

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