MESON Chess Problem Database

Problem Display
PID: 23146 (8/2K2p1Q/4k3/8/R6P/3N4/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/2K2p1Q/4k3/8/R6P/3N4/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe4#
      • 2.Qf5#
      • 2.Qxf7#
    • 1...f6
      • 2.Qd7#
  • Tries
    • 1.Re4+?
      • 1...Kd5
        • 2.Qf5#
      • 1...Kf6!
    • 1.Rf4?
      • threat
        • 2.Qe4#
        • 2.Qxf7#
      • 1...Kd5
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qxf7#
      • 1...Ke7
        • 2.Qxf7#
      • 1...f6
        • 2.Qd7#
      • 1...f5!
    • 1.Qh6+?
      • 1...Kd5
        • 2.Qc6#
        • 2.Qd6#
      • 1...Kf5
        • 2.Rf4#
      • 1...Ke7
        • 2.Re4#
      • 1...f6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
        • 2.Qxf7#
      • 1...Kf5
        • 2.Qxf7#
      • 1...Ke7
        • 2.Re4#
      • 1...f5
        • 2.Sf4#
      • 1...f6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATE,SBLOCK::QAB1(E)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR2(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(E),XP(b)
        • P(b);OGATE::QAB1(E)
      • Refutation
        • P(b);
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(a);S_FLIGHT::QAR2(E),XP(b)
      • K(a);P-FLIGHT,P_SPINP(b)::R(B)
      • P(b);SBLOCK::S(A)
      • P(b);OGATE,SBLOCK::QAB1(E)
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