MESON Chess Problem Database

Problem Display
PID: 11368 (1R6/8/8/p7/k3K1Q1/8/2p4R/8 w - - 0 1)

Thompson, Frederick

Chess, 1938

1R6/8/8/p7/k3K1Q1/8/2p4R/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...c1R
      • 2.Ra2#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qa2#
        • 2.Qb3#
      • 1...Ka3
        • 2.Qb3#
      • 1...c1Q
        • 2.Qb3#
      • 1...c1B
        • 2.Qb3#
      • 1...c1S!
    • 1.Qg8?
      • threat
        • 2.Qa2#
        • 2.Qb3#
      • 1...Ka3
        • 2.Qb3#
      • 1...c1Q
        • 2.Qb3#
      • 1...c1B
        • 2.Qb3#
      • 1...c1S!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qa1#
      • 1...Ka3
        • 2.Qa1#
      • 1...cxd1Q
        • 2.Ra2#
      • 1...cxd1S
        • 2.Ra2#
      • 1...cxd1B
        • 2.Ra2#
      • 1...cxd1R
        • 2.Ra2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE::R(A)
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • P(a);::QAB1(C)
      • Refutation
        • P(a);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR1(C)
        • P(a);::QAB1(C)
      • Refutation
        • P(a);
  • Actual
    • Q(C);P_PINP(a)
    • Threat
      • QAR(C)
    • Vars
      • K(b);N_SPINP(a),P-FLIGHT::QAR2(C)
      • P(a);N_SPINP(a),OGATE,XQ(C)::R(A)
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