MESON Chess Problem Database

Problem Display
PID: 193718 (8/8/4Q3/1N6/p3p3/3k4/8/3K4 w - - 0 1)

Pannwitz, F

Tagliche Rundschau, 1915

8/8/4Q3/1N6/p3p3/3k4/8/3K4

#2

3 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...a3
      • 2.Qb3#
    • 1...e3
      • 2.Qd5#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qe2#
      • 1...e3
        • 2.Qd5#
        • 2.Qc2#
      • 1...Ke3!
    • 1.Qg4?
      • threat
        • 2.Qe2#
      • 1...Ke3
        • 2.Qg3#
      • 1...e3
        • 2.Qd4#
      • 1...Kc4!
    • 1.Qf7?
      • 1...a3
        • 2.Qb3#
      • 1...e3
        • 2.Qd5#
      • 1...Ke3!
    • 1.Qc8?
      • threat
        • 2.Qc3#
      • 1...e3
        • 2.Qc2#
      • 1...Ke3!
    • 1.Qe5?
      • threat
        • 2.Qc3#
        • 2.Qd4#
      • 1...Ke3
        • 2.Qg3#
      • 1...e3
        • 2.Qd4#
        • 2.Qd5#
      • 1...Kc4!
    • 1.Qc6?
      • threat
        • 2.Qc3#
      • 1...e3
        • 2.Qd5#
        • 2.Qc2#
      • 1...Ke3!
    • 1.Qd6+?
      • 1...Ke3
        • 2.Qg3#
      • 1...Kc4!
  • Keys
    • 1.Qg8!
      • 1...Ke3
        • 2.Qg3#
      • 1...a3
        • 2.Qb3#
      • 1...e3
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR2(C)
    • P(c);SBLOCK::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • P(c);OGATE::QAR1(C)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(b);N_GUARD::QAR2(C)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(c)::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • P(b);N_GUARD::QAR2(C)
      • P(c);SBLOCK::QAR2(C)
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