MESON Chess Problem Database

Problem Display
PID: 15889 (6K1/8/8/6N1/4R3/6kN/6r1/7Q w - - 0 1)

Ritchings, Mark

The Problemist, 1988

6K1/8/8/6N1/4R3/6kN/6r1/7Q

#2

5 + 2

2838 Fun with Chess Miniatures 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qxg1#
    • 1...Rh2
      • 2.Qf3#
  • Tries
    • 1.Rf4?
      • threat
        • 2.Se4#
      • 1...Rh2
        • 2.Qf3#
      • 1...Re2!
    • 1.Qe1+?
      • 1...Rf2
        • 2.Qxf2#
      • 1...Kh2!
  • Keys
    • 1.Sf2!
      • threat
        • 2.Qh4#
      • 1...Kxf2
        • 2.Qe1#
      • 1...Rxf2
        • 2.Qh3#
      • 1...Rg1
        • 2.Qxg1#
      • 1...Rh2
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATEB::QAR2(A),XR(a)
    • R(a);OGATE,SBLOCK::QAR1(A)
  • Tries
    • Try
      • R(C);
      • Threat
        • S(D)
      • Vars
        • R(a);OGATE,SBLOCK::QAR1(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
      • Refutation
        • K(b);P_PINS(D),S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);OGATEB,P_PINS(D),S_FLIGHT,XS(B)::QAB1(A)
      • R(a);SBLOCK,XS(B)::QAR1(A)
      • R(a);OGATEB::QAR2(A),XR(a)
      • R(a);OGATE,SBLOCK::QAR1(A)
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