MESON Chess Problem Database

Problem Display
PID: 89104 (6Q1/8/8/5N2/5p2/4Pk2/8/4K2R w K - 0 1)

Rice, John Michael

The Problemist, 1991

6Q1/8/8/5N2/5p2/4Pk2/8/4K2R

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6?
      • threat
        • 2.Rh3#
      • 1...fxe3
        • 2.Rf1#
      • 1...Kxe3!
    • 1.Rg1?
      • threat
        • 2.Qd5#
        • 2.Qg2#
        • 2.Qa8#
      • 1...fxe3
        • 2.Qg4#
      • 1...Ke4!
    • 1.Rh4?
      • threat
        • 2.Rxf4#
        • 2.Qd5#
        • 2.Qa8#
      • 1...fxe3
        • 2.Sd4#
        • 2.Qd5#
        • 2.Qg3#
        • 2.Qg4#
        • 2.Qa8#
      • 1...Ke4!
  • Keys
    • 1.Qc4!
      • 1...Kg2
        • 2.Qf1#
      • 1...Kg4
        • 2.Qxf4#
      • 1...fxe3
        • 2.0-0#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • R(B)
      • Vars
        • P(b);SBLOCK,XP(C)::R(B)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(b);XP(C)::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB1(E)
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(E),XP(b)
      • P(b);XP(C)::0-0
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