MESON Chess Problem Database

Problem Display
PID: 1166 (KnQB2B1/1p1p4/1p4pb/pr3k1N/2N3p1/3P1b2/6n1/5R2 w - - 0 1)

Shanahan, Ian

Problem Observer, 1995

KnQB2B1/1p1p4/1p4pb/pr3k1N/2N3p1/3P1b2/6n1/5R2

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sd6#
    • 1...Bf4
      • 2.Sg7#
    • 1...Sf4
      • 2.Sg3#
    • 1...Sa6
      • 2.Qxd7#
    • 1...Sc6
      • 2.Qxd7#
  • Tries
    • 1.Rxf3+?
      • 1...Bf4
        • 2.Sg3#
        • 2.Sg7#
      • 1...Sf4
        • 2.Sg3#
      • 1...gxf3!
  • Keys
    • 1.Qxb7!
      • threat
        • 2.Qe4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Re5
        • 2.Sd6#
      • 1...Bf4
        • 2.Sg7#
      • 1...Sf4
        • 2.Sg3#
      • 1...Sc6
        • 2.Qxd7#
      • 1...d5
        • 2.Qf7#

There are these versions: 173212

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);SBLOCK::S(C)
    • B(i);N_GUARD,N_SPINB(b),SBLOCK::S(D)
    • S(a);N_SPINB(b),SBLOCK::S(D)
    • S(l);N_GUARD::QAB(F),XP(k)
  • Tries
    • Try
      • R(A);CHECK,XB(b)
      • Vars
        • S(a);P_SPINS(a)::S(D)
      • Refutation
        • P(c);XR(A)
  • Actual
    • Q(F);N_PINP(k),P_SPINQ(F),XP(j)
    • Threat
      • QAB1(F)
    • Vars
      • R(e);N_GUARD,N_PINQ(F)::QAR2(F),XR(e)
      • R(e);SBLOCK::S(C)
      • B(i);N_GUARD,N_SPINB(b),SBLOCK::S(D)
      • S(a);N_SPINB(b),SBLOCK::S(D)
      • S(l);N_PINQ(F)::QAB(F),XP(k)
      • P(k);N_PINQ(F)::QAR2(F)
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