MESON Chess Problem Database

Problem Display
PID: 226634 (5k2/8/6K1/8/4Q3/4P3/8/8 w - - 0 1)

Grab, F

Deutsche Schachzeitung, 1968

5k2/8/6K1/8/4Q3/4P3/8/8

#2

3 + 1

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kg8
      • 2.Qa8#
      • 2.Qe8#
  • Tries
    • 1.Kh6?
      • 1...Kg8
        • 2.Qe8#
      • 1...Kf7!
    • 1.Qc6?
      • 1...Kg8
        • 2.Qa8#
        • 2.Qe8#
        • 2.Qc8#
      • 1...Ke7!
    • 1.Qb7?
      • threat
        • 2.Qf7#
      • 1...Kg8
        • 2.Qa8#
        • 2.Qc8#
        • 2.Qg7#
        • 2.Qb8#
      • 1...Ke8!
    • 1.Qa4?
      • 1...Kg8
        • 2.Qe8#
        • 2.Qa8#
      • 1...Ke7!
    • 1.Qb4+?
      • 1...Kg8
        • 2.Qb8#
      • 1...Ke8!
    • 1.Qh4?
      • threat
        • 2.Qd8#
      • 1...Kg8
        • 2.Qd8#
      • 1...Ke8!
    • 1.Qe7+?
      • 1...Kg8
        • 2.Qd8#
        • 2.Qg7#
        • 2.Qe8#
      • 1...Kxe7!
  • Keys
    • 1.Qe5!
      • 1...Kg8
        • 2.Qg7#
        • 2.Qb8#
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(a);P-FLIGHT::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);
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