MESON Chess Problem Database

Problem Display
PID: 15626 (5K2/8/2Qp4/1N2k3/8/5R2/3r4/8 w - - 0 1)

Lincoln, Robert A

Newark Star-Ledger, 1986

5K2/8/2Qp4/1N2k3/8/5R2/3r4/8

#2

4 + 3

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Qe8#
    • 1...d5
      • 2.Qe8#
  • Tries
    • 1.Rf5+?
      • 1...Ke6
        • 2.Qc8#
      • 1...Kxf5!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...Ke4
        • 2.Qf5#
      • 1...Kd5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Rd5
        • 2.Qe3#
      • 1...d5
        • 2.Qe3#
        • 2.Qe7#
      • 1...dxc5!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Ke4
        • 2.Qf5#
      • 1...Kd5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke6
        • 2.Qe8#
      • 1...Re2
        • 2.Qd5#
      • 1...Rd4
        • 2.Qe8#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR(C)
    • P(c);SBLOCK::QAR(C)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAB(C)
      • Refutation
        • K(b);P-FLIGHT,XR(A)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(C)
        • R(a);P_SPINR(a),SBLOCK::QAR2(C)
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);S_FLIGHT::QAR1(C)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR2(C)
      • R(a);N_GUARD::QAR1(C)
      • R(a);SBLOCK::QAR(C)
      • R(a);N_GUARD::QAR1(C),XR(a)
      • P(c);OGATE::QAB1(C)
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