MESON Chess Problem Database

Problem Display
PID: 87648 (7Q/8/8/8/8/7P/6k1/R3K2R w QK - 0 1)

McDowell, Michael

The Problemist, 1993

7Q/8/8/8/8/7P/6k1/R3K2R

#2

5 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb2+?
      • 1...Kxh1
        • 2.0-0-0#
      • 1...Kg3
        • 2.Qf2#
      • 1...Kf3!
    • 1.Qf6?
      • 1...Kg3
        • 2.Qf2#
      • 1...Kxh1!
    • 1.Qh5?
      • 1...Kg3
        • 2.Qg4#
      • 1...Kxh1!
    • 1.Qb8?
      • 1...Kxh1
        • 2.Kf2#
      • 1...Kf3!
    • 1.Qf8?
      • 1...Kg3
        • 2.Qf2#
      • 1...Kxh1!
  • Keys
    • 1.Qe5!
      • 1...Kxh1
        • 2.Kf2#
      • 1...Kf3
        • 2.0-0#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT,XR(C)::0-0-0
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
    • Try
      • Q(E);
      • Vars
        • K(a);S_FLIGHT,XR(C)::R(A)+K(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • K(a);S_FLIGHT,XR(C)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT,XR(C)::R(A)+K(B)
      • K(a);S_FLIGHT::0-0
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