MESON Chess Problem Database

Problem Display
PID: 143814 (8/3N1n2/3p3Q/5p2/N2k1b2/1B3P2/4K1n1/8 w - - 0 1)

Shire, David J

British Chess Magazine, 1992

8/3N1n2/3p3Q/5p2/N2k1b2/1B3P2/4K1n1/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qxd2#
    • 1...Bh2
      • 2.Qd2#
    • 1...Bg3
      • 2.Qd2#
    • 1...Be5
      • 2.Qd2#
    • 1...Se1
      • 2.Qxf4#
    • 1...Se3
      • 2.Qxf4#
    • 1...Sh4
      • 2.Qxf4#
    • 1...Se5
      • 2.Qxd6#
    • 1...d5
      • 2.Qb6#
  • Tries
    • 1.Sb8?
      • threat
        • 2.Sc6#
      • 1...Ke5
        • 2.Sc6#
        • 2.Qg7#
      • 1...Se5
        • 2.Qxd6#
      • 1...Sd8!
    • 1.Qe6?
      • threat
        • 2.Qc4#
        • 2.Qd5#
      • 1...Se5
        • 2.Qd5#
        • 2.Qxd6#
      • 1...d5
        • 2.Qxd5#
        • 2.Qb6#
      • 1...Se3!
    • 1.Qf6+?
      • 1...Se5
        • 2.Qxd6#
      • 1...Be5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sc6#
      • 1...Kxe5
        • 2.Qg7#
      • 1...Bxe5
        • 2.Qd2#
      • 1...Sxe5
        • 2.Qxd6#
      • 1...dxe5
        • 2.Qb6#
      • 1...Sd8
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(c);OGATE::QAR2(E),XB(c)
    • B(c);OGATE::QAR2(E)
    • S(a);N_GUARD::QAR2(E),XB(c)
    • S(f);N_GUARD,S_CUTB(c)::QAR2(E),XP(e)
    • P(e);OGATE::QAB(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • S(f);N_GUARD,S_CUTB(c)::QAR2(E),XP(e)
      • Refutation
        • S(f);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f),S_CUTB(c)::QAR2(E),XP(e)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XS(F)::QAB(E)
      • B(c);OGATE,SBLOCK,XS(F)::QAR2(E)
      • S(f);N_GUARD,XS(F)::QAR2(E),XP(e)
      • P(e);OGATE,SBLOCK,XS(F)::QAB(E)
      • S(f);N_GUARD::QAR2(E),XP(e)
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