MESON Chess Problem Database

Problem Display
PID: 85779 (2Q5/8/8/8/8/k7/P7/2K5 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1986

2Q5/8/8/8/8/k7/P7/2K5

#2

3 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb7?
      • threat
        • 2.Qb3#
      • 1...Kxa2
        • 2.Qb2#
      • 1...Ka4!
    • 1.Qd7?
      • 1...Kxa2
        • 2.Qa4#
      • 1...Kb4!
    • 1.Qc3+?
      • 1...Kxa2
        • 2.Qb2#
      • 1...Ka4!
    • 1.Qc6?
      • 1...Kxa2
        • 2.Qa4#
      • 1...Kb4!
    • 1.Qb8?
      • threat
        • 2.Qb3#
      • 1...Kxa2
        • 2.Qb2#
      • 1...Ka4!
    • 1.Qe8?
      • 1...Kxa2
        • 2.Qa4#
      • 1...Kb4!
  • Keys
    • 1.Qg4!
      • 1...Kxa2
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT,XP(B)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,XP(B)::QAR2(C)
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