MESON Chess Problem Database

Problem Display
PID: 52610 (8/5P2/KRNN2Q1/1p1kP2R/1P6/pP2p3/8/5q2 w - - 0 1)

Dittrich, Stefan

3rd Prize, Het Belgisch Schaakbord (L'Echiquier Belge), 1987-1988

8/5P2/KRNN2Q1/1p1kP2R/1P6/pP2p3/8/5q2

#2

10 + 5

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7
      • 2.Qxf7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc3#
      • 1...Qd3
        • 2.e6#
      • 1...Qc4
        • 2.e6#
      • 1...Qa1
        • 2.Rxb5#
      • 1...Qc1
        • 2.e6#
      • 1...Qe1
        • 2.Rxb5#
        • 2.e6#
      • 1...Qf6!
    • 1.Se8?
      • threat
        • 2.Sc7#
      • 1...Qxf7
        • 2.Rxb5#
      • 1...Qf5!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Se7#
      • 1...Qxb5+
        • 2.Rxb5#
      • 1...Qxf7
        • 2.Sc3#
      • 1...Qf5
        • 2.Sc3#
      • 1...Qf6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XP(J)::QAB(I),XQ(a)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(a);N_GUARD::R(D)+P(C)
        • Q(a);N_GUARD::R(F),XP(d)
      • Refutation
        • Q(a);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • Q(a);N_GUARD,XP(J)::R(F),XP(d)
      • Refutation
        • Q(a);
  • Actual
    • S(H);P_SPINS(H),XP(d)
    • Threat
      • S(G)
    • Vars
      • Q(a);CHECK,OGATE,XS(H)::R(F),XQ(a)
      • Q(a);N_PINS(H),XP(J)::S(H)
      • Q(a);N_PINS(H)::S(H)
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