MESON Chess Problem Database

Problem Display
PID: 176154 (8/8/p7/R7/2k5/8/P3K3/4Q3 w - - 0 1)

Blaschke, Friedrich

Schach-Echo, 1953

8/8/p7/R7/2k5/8/P3K3/4Q3

#2

4 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb4#
  • Tries
    • 1.Rc5+?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kxc5!
    • 1.Rf5?
      • 1...Kd4
        • 2.Qb4#
      • 1...a5!
    • 1.Rg5?
      • 1...Kd4
        • 2.Qb4#
      • 1...a5!
    • 1.Rh5?
      • 1...Kd4
        • 2.Qb4#
      • 1...a5!
    • 1.Qf2?
      • threat
        • 2.Qc5#
      • 1...Kb4
        • 2.Qc5#
      • 1...Kc3!
    • 1.Qg3?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kb4!
    • 1.Qb1?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qb4#
      • 1...Kc3!
    • 1.Qc1+?
      • 1...Kb4
        • 2.Qc5#
      • 1...Kd4!
    • 1.Qg1?
      • threat
        • 2.Qc5#
      • 1...Kb4
        • 2.Qc5#
      • 1...Kc3!
    • 1.a3?
      • threat
        • 2.Qb4#
      • 1...Kd4
        • 2.Qb4#
      • 1...Kb3!
    • 1.a4?
      • 1...Kd4
        • 2.Qb4#
      • 1...Kb3!
  • Keys
    • 1.Kd2!
      • threat
        • 2.Qh4#
        • 2.Qe4#
      • 1...Kb4
        • 2.Kd3#
      • 1...Kd4
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT,XR(D)
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • P(B);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • K(C);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::QAB(A)+K(C)
      • K(a);P-FLIGHT::QAR(A)
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