MESON Chess Problem Database

Problem Display
PID: 23185 (k7/5r2/2N5/NPK5/8/Q7/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

k7/5r2/2N5/NPK5/8/Q7/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3+?
      • 1...Ra7
        • 2.Qxa7#
      • 1...Kb7!
    • 1.Sc4+?
      • 1...Ra7
        • 2.Qxa7#
      • 1...Kb7!
  • Keys
    • 1.Kb6!
      • threat
        • 2.Sb7#
      • 1...Rb7+
        • 2.Sxb7#
      • 1...Rf3
        • 2.Sb3#
      • 1...Rf4
        • 2.Sc4#
      • 1...Ra7
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR1(A),XR(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • QAR(A)+S(B)
    • Vars
      • R(a);CHECK::QAR(A)+S(B),XR(a)
      • R(a);N_GUARD::QAR(A)+S(B)
      • R(a);N_GUARD::QAR(A)
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