MESON Chess Problem Database

Problem Display
PID: 29939 (1b4QK/qb5p/pr3P2/5k2/2N3RB/5pPp/8/8 w - - 0 1)

Shire, David J

Problem Observer, 1987

1b4QK/qb5p/pr3P2/5k2/2N3RB/5pPp/8/8

#2

7 + 9

3256 David Shire Selected Chess Problems 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Rf4#
    • 1...Re6
      • 2.Qg5#
    • 1...Bf4
      • 2.Rxf4#
    • 1...Be5
      • 2.Se3#
  • Tries
    • 1.Rg5+?
      • 1...Kxf6
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd5#
        • 2.Re5#
        • 2.Rh5#
      • 1...Ke4!
    • 1.Qd5+?
      • 1...Kxg4
        • 2.Se3#
        • 2.Qg5#
      • 1...Be5
        • 2.Se3#
      • 1...Bxd5!
    • 1.Qxh7+?
      • 1...Kxg4
        • 2.Se3#
        • 2.Qg6#
      • 1...Ke6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Se3#
      • 1...Kxg4
        • 2.Se3#
      • 1...Rxf6
        • 2.Rg5#
      • 1...Rb1
        • 2.Qd7#
      • 1...Rb2
        • 2.Qd7#
      • 1...Rb3
        • 2.Qd7#
      • 1...Rb4
        • 2.Qd7#
      • 1...Rb5
        • 2.Qd7#
      • 1...Rc6
        • 2.Qe4#
      • 1...Rd6
        • 2.Rf4#
      • 1...Re6
        • 2.Qh5#
      • 1...Bf4
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(e);S_CUTB(i)::R1(C)
    • R(e);SBLOCK::QAR1(F)
    • B(i);N_GUARD::R1(C),XB(i)
    • B(i);P_PINP(E),SBLOCK::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • B(i);P_PINP(E),P_SPINB(i)::S(B)
      • Refutation
        • B(g);XQ(F)
    • Try
      • Q(F);CHECK,XP(h)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • S(B)
    • Vars
      • K(c);S_FLIGHT,XR(C)::S(B)
      • R(e);SBLOCK,XP(E)::R1(C)
      • R(e);N_GUARD::QAB(F)
      • R(e);S_CUTB(g)::QAB1(F)
      • R(e);S_CUTB(i)::R1(C)
      • R(e);SBLOCK::QAR2(F)
      • B(i);N_GUARD::R1(C),XB(i)
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