MESON Chess Problem Database

Problem Display
PID: 95181 (8/8/6R1/8/4k3/5N2/3K4/3Q4 w - - 0 1)

Krizhanivsky, Vasil Viktorovich

Cherkasskaya Pravda, 1987

8/8/6R1/8/4k3/5N2/3K4/3Q4

#2

4 + 1

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc2+?
      • 1...Kxf3
        • 2.Qf5#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf4!
    • 1.Qa4+?
      • 1...Kd5
        • 2.Qc6#
        • 2.Qd4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Kxf3!
  • Keys
    • 1.Qg1!
      • 1...Kxf3
        • 2.Qe3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qg4#

This anticipates 87700(2000)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XS(C)::QAR2(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT,XS(C)::QAR1(A)
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
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