MESON Chess Problem Database

Problem Display
PID: 8031 (k1K1Q3/r2p4/P7/1N6/8/8/8/8 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

k1K1Q3/r2p4/P7/1N6/8/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6
      • 2.Kc7#
    • 1...Rb7
      • 2.axb7#
    • 1...Rc7+
      • 2.Kxc7#
  • Tries
    • 1.Qe4+?
      • 1...Rb7
        • 2.Qxb7#
        • 2.axb7#
      • 1...d5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxa7#
      • 1...Rc7+
        • 2.Sxc7#
      • 1...Rxa6
        • 2.Sc7#
      • 1...Rb7
        • 2.axb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(a);XP(B)::QAR(D)+K(C)
    • R(a);OGATE::P(B),XR(a)
    • R(a);CHECK::QAR(D)+K(C),XR(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XR(a)
    • Vars
      • R(a);CHECK,N_GUARD::S(A),XR(a)
      • R(a);N_GUARD,XP(B)::S(A)
      • R(a);OGATE::P(B),XR(a)
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