MESON Chess Problem Database

Problem Display
PID: 7861 (qn2Q2n/3ppp1b/4k3/4B3/3R1R2/8/p7/K4B2 w - - 0 1)

Shire, David J

Prize, Oxford TT, 1994

qn2Q2n/3ppp1b/4k3/4B3/3R1R2/8/p7/K4B2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qxe7#
  • Tries
    • 1.Bf6?
      • threat
        • 2.Qxe7#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Sg6
        • 2.Bh3#
      • 1...Qa3!
    • 1.Qxd7+?
      • 1...Kxe5
        • 2.Qxe7#
      • 1...Sxd7!
    • 1.Qxf7+?
      • 1...Kxe5
        • 2.Qxe7#
      • 1...Sxf7!
  • Keys
    • 1.Bd6!
      • threat
        • 2.Qxe7#
      • 1...Sc6
        • 2.Bc4#
      • 1...Sg6
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT,XB(E)::QAR2(F),XP(d)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(F),XP(d)
      • Vars
        • S(h);N_GUARD::QAB1(F),XP(c)
        • S(i);S_CUTB(f)::B(B)
      • Refutation
        • Q(g);
    • Try
      • Q(F);CHECK,N_PINP(d),XP(c)
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR2(F),XP(d)
      • Refutation
        • S(h);XQ(F)
    • Try
      • Q(F);CHECK,N_PINP(d),XP(e)
      • Vars
        • K(b);P-FLIGHT,XB(E)::QAR2(F),XP(d)
      • Refutation
        • S(i);XQ(F)
  • Actual
    • B(E);
    • Threat
      • QAR1(F),XP(d)
    • Vars
      • S(h);S_CUTQ(g)::B(B)
      • S(i);N_GUARD::QAB1(F),XP(e)
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