MESON Chess Problem Database

Problem Display
PID: 11829 (R7/5Nk1/8/7Q/7P/8/8/7K w - - 0 1)

Kovacevic, Marjan

4th HM., Mat, 1972

R7/5Nk1/8/7Q/7P/8/8/7K

#2

5 + 1

5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sh6?
      • 1...Kh7
        • 2.Sf5#
      • 1...Kf6!
    • 1.Ra7?
      • 1...Kf8
        • 2.Qh8#
      • 1...Kg8
        • 2.Qh8#
      • 1...Kf6!
    • 1.Qg5+?
      • 1...Kh7
        • 2.Rh8#
        • 2.Qh6#
        • 2.Qg8#
      • 1...Kxf7!
  • Keys
    • 1.Sd8!
      • 1...Kf6
        • 2.Qg5#
      • 1...Kf8
        • 2.Qf7#
      • 1...Kg8
        • 2.Se6#

Anticipated by 74150(1929)

This anticipates 164209(1988), 154644(2006), 146940(2012)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAR(C)+S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);S_FLIGHT::QAR1(C)
      • K(a);P-FLIGHT::R(E)+S(D)
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