MESON Chess Problem Database

Problem Display
PID: 89112 (8/8/8/8/n7/4p3/4Q3/kN2K2R w K - 0 1)

Rice, John Michael

The Problemist, 1991

8/8/8/8/n7/4p3/4Q3/kN2K2R

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb1
      • 2.0-0#
  • Tries
    • 1.0-0?
      • threat
        • 2.Sa3#
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb2!
  • Keys
    • 1.Rh2!
      • threat
        • 2.Qa2#
      • 1...Kxb1
        • 2.Qd1#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Sc3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,XS(A)::0-0
  • Tries
    • Try
      • K(B);0-0
      • Threat
        • DUALS(2)
      • Vars
        • S(c);::R(C)+S(A),XS(c)
      • Refutation
        • S(c);
  • Actual
    • R(C);
    • Threat
      • QAR1(D)
    • Vars
      • K(a);OGATEB,P-FLIGHT,XS(A)::QAR2(D)
      • S(c);N_GUARD::QAB1(D),XS(c)
      • S(c);N_GUARD::QAB1(D)
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