MESON Chess Problem Database

Problem Display
PID: 81733 (4k3/8/4K3/4p3/8/8/4Q3/8 w - - 0 1)

Hornecker, Siegfried

Wikipedia, 2007

4k3/8/4K3/4p3/8/8/4Q3/8

#2

2 + 2

273 Mat Plus 2007
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qb5+?
      • 1...Kd8
        • 2.Qd7#
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qh5+?
      • 1...Kf8
        • 2.Qf7#
        • 2.Qh8#
      • 1...Kd8!
    • 1.Qb2?
      • threat
        • 2.Qb8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8!
    • 1.Qh2?
      • threat
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...Kd8!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Qb8#
        • 2.Qh8#
      • 1...Kd8
        • 2.Qb8#
      • 1...Kf8
        • 2.Qh8#

Anticipated by 44561(1870), 47232(1906), 22033(1923)

This anticipates 221421(2015)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);XP(a)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
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