MESON Chess Problem Database

Problem Display
PID: 48068 (5n2/7p/5Q2/7k/7P/6Kn/8/8 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

5n2/7p/5Q2/7k/7P/6Kn/8/8

#2

3 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Qg5#
    • 1...Sf2
      • 2.Qg5#
    • 1...Sf4
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
  • Tries
    • 1.Kxh3?
      • threat
        • 2.Qg5#
      • 1...h6
        • 2.Qf5#
      • 1...Se6!
    • 1.Qf5+?
      • 1...Sg5
        • 2.Qxg5#
      • 1...Kh6!
    • 1.Qf7+?
      • 1...Sg6
        • 2.Qxh7#
      • 1...Kh6!
  • Keys
    • 1.Qg7!
      • 1...Sg1
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sg6
        • 2.Qxh7#
      • 1...Sd7
        • 2.Qxh7#
      • 1...h6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAR1(C)
    • S(a);N_GUARD::QAR1(C),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Threat
        • QAR1(C)
      • Vars
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • S(d);
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(C),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR2(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • S(a);N_GUARD::QAR1(C)
      • S(a);N_GUARD::QAR1(C),XS(a)
      • S(d);N_GUARD::QAR2(C),XP(c)
      • P(c);SBLOCK::QAB1(C)
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