MESON Chess Problem Database

Problem Display
PID: 108824 (7K/7n/7R/7P/7k/3N4/6Q1/8 w - - 0 1)

Lebedev, Aleksandr N

Kudesnik, 2000

7K/7n/7R/7P/7k/3N4/6Q1/8

#2

5 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rg6?
      • threat
        • 2.Qh1#
        • 2.Qh2#
        • 2.Qg4#
      • 1...Kxh5
        • 2.Qg4#
      • 1...Sf6
        • 2.Qh1#
        • 2.Qh2#
      • 1...Sg5!
    • 1.Qh3+?
      • 1...Kg5
        • 2.Rg6#
      • 1...Kxh3!
    • 1.Qh2+?
      • 1...Kg5
        • 2.Qf4#
      • 1...Kg4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf3#
        • 2.Sg6#
        • 2.Qg4#
      • 1...Sg5
        • 2.Sg6#
        • 2.Qg4#
      • 1...Sf6
        • 2.Sf3#
        • 2.Sg6#
      • 1...Sf8
        • 2.Sf3#
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(3)
      • Vars
        • K(a);P-FLIGHT,XP(C)::QAB1(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • DUALS(3)
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