MESON Chess Problem Database

Problem Display
PID: 107154 (8/8/8/7b/8/4k3/Q3N3/R3K2R w KQ - 0 1)

Kardos, Tivadar

De Waarheid, 1965

8/8/8/7b/8/4k3/Q3N3/R3K2R

#2

5 + 2

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rh3+?
      • 1...Ke4
        • 2.Qe6#
      • 1...Bf3!
    • 1.Qd5?
      • threat
        • 2.Ra3#
      • 1...Bg6
        • 2.Rh3#
      • 1...Bxe2!
  • Keys
    • 1.Qe6+!
      • 1...Kd3
        • 2.0-0-0#
      • 1...Kf3
        • 2.0-0#

Anticipated by 92916(1929)

This anticipates 46970(1987), 178198(2003)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(D)
      • Refutation
        • B(b);P_SPINB(b)
    • Try
      • Q(D);
      • Threat
        • R(A)
      • Vars
        • B(b);N_GUARD::R(C)
      • Refutation
        • B(b);XS(E)
  • Actual
    • Q(D);CHECK
    • Vars
      • K(a);P-FLIGHT::0-0-0
      • K(a);P-FLIGHT::0-0
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