MESON Chess Problem Database

Problem Display
PID: 23145 (8/8/R7/8/1k6/1N6/P3Q3/4K3 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/R7/8/1k6/1N6/P3Q3/4K3

#2

5 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qc4#
      • 1...Kc3!
    • 1.Ra4+?
      • 1...Kc3
        • 2.Rc4#
        • 2.Qd2#
      • 1...Kxa4!
    • 1.Qg4+?
      • 1...Kb5
        • 2.Qa4#
      • 1...Kc3!
    • 1.Qe4+?
      • 1...Kb5
        • 2.Qa4#
      • 1...Kc3!
  • Keys
    • 1.Sa5!
      • 1...Ka3
        • 2.Sc6#
      • 1...Kc3
        • 2.Qd2#
      • 1...Ka4
        • 2.Sc6#
      • 1...Kc5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(C)
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,XR(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::R(E)+S(D)
      • K(a);S_FLIGHT::QAB1(C)
      • K(a);P-FLIGHT::R(E)+S(D)
      • K(a);S_FLIGHT::QAR1(C)
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