MESON Chess Problem Database

Problem Display
PID: 207680 (8/5K2/8/p4NkN/8/8/8/3Q4 w - - 0 1)

Kamcatsky, Aleksandr

Sachova skladba, 2015

8/5K2/8/p4NkN/8/8/8/3Q4

#2

4 + 2

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qg1+?
      • 1...Kxh5
        • 2.Qg6#
      • 1...Kxf5!
    • 1.Qd4?
      • 1...Kxf5
        • 2.Qf4#
      • 1...Kxh5
        • 2.Qh4#
      • 1...a4!
    • 1.Qd6?
      • threat
        • 2.Qg6#
      • 1...Kxf5
        • 2.Qf4#
      • 1...Kxh5
        • 2.Qg6#
      • 1...Kg4!
  • Keys
    • 1.Qa4!
      • 1...Kxf5
        • 2.Qf4#
      • 1...Kxh5
        • 2.Qh4#

Anticipated by 4617(1884), 194171(1917), 119959(1924), 227453(1926), 71679(2006), 246013(2008)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT,XS(B)
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT,XS(B)::QAR1(A)
        • K(b);P-FLIGHT,XS(C)::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT,XS(B)::QAR1(A)
        • K(b);P-FLIGHT,XS(C)::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT,XS(B)::QAR1(A)
      • K(b);P-FLIGHT,XS(C)::QAR1(A)
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