MESON Chess Problem Database

Problem Display
PID: 33467 (8/6K1/8/7k/2Q4p/5n1N/4p3/8 w - - 0 1)

Lincoln, Robert A

The Problemist Supplement, 2001

8/6K1/8/7k/2Q4p/5n1N/4p3/8

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4?
      • threat
        • 2.Qxf3#
        • 2.Qg6#
      • 1...e1S
        • 2.Qg6#
      • 1...Se1
        • 2.Qf5#
        • 2.Qg6#
      • 1...Sg1
        • 2.Qf5#
        • 2.Qg6#
      • 1...Sd2
        • 2.Qf5#
        • 2.Qg6#
      • 1...Sh2
        • 2.Qf5#
        • 2.Qg6#
      • 1...Sd4
        • 2.Qg6#
      • 1...Se5
        • 2.Qf5#
      • 1...Sg5!
    • 1.Qf4?
      • threat
        • 2.Qxf3#
      • 1...Se1
        • 2.Qg5#
        • 2.Qf5#
      • 1...Sg1
        • 2.Qg5#
        • 2.Qf5#
      • 1...Sd2
        • 2.Qg5#
        • 2.Qf5#
      • 1...Sh2
        • 2.Qg5#
        • 2.Qf5#
      • 1...Sd4
        • 2.Qg5#
      • 1...Se5
        • 2.Qg5#
        • 2.Qf5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...e1S!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qg6#
      • 1...Se5
        • 2.Qf5#
      • 1...Sg5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB1(B)
        • S(b);::QAB1(B)
        • S(b);N_GUARD::QAR2(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Threat
        • QAB(B),XS(b)
      • Vars
        • S(b);N_GUARD::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • S(b);N_GUARD::QAR2(B)
      • S(b);SBLOCK::S(A)
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