MESON Chess Problem Database

Problem Display
PID: 106887 (4Q3/8/1N2N3/4k3/8/2K3P1/4P3/8 w - - 0 1)

Diggs, J Ross

Baltimore News, 1888

4Q3/8/1N2N3/4k3/8/2K3P1/4P3/8

#2

6 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sd4#
      • 2.Sg7#
  • Tries
    • 1.Qf7?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kd6!
    • 1.Qe7?
      • threat
        • 2.Sd4#
        • 2.Sg7#
      • 1...Ke4
        • 2.Sd4#
        • 2.Sg7#
      • 1...Kf5!
    • 1.Qf8?
      • 1...Ke4
        • 2.Qf4#
      • 1...Kxe6!
  • Keys
    • 1.e4!
      • 1...Kxe4
        • 2.Sd4#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(F);
      • Vars
        • K(a);P-FLIGHT::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT,XS(E)
  • Actual
    • P(A);
    • Vars
      • K(a);P-FLIGHT,XP(A)::QAR(F)+S(E)
      • K(a);S_FLIGHT::S(D)
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