MESON Chess Problem Database

Problem Display
PID: 185840 (4r3/5Q2/3RR3/4p3/2B1p3/2pPk3/8/2K3N1 w - - 0 1)

Smedley, Don A

Chess, 1957

4r3/5Q2/3RR3/4p3/2B1p3/2pPk3/8/2K3N1

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...exd3
      • 2.Qf3#
  • Tries
    • 1.Rxe5?
      • threat
        • 2.Qf3#
      • 1...Rf8
        • 2.Rxe4#
      • 1...Rxe5!
    • 1.Rg6?
      • threat
        • 2.Rg3#
      • 1...exd3
        • 2.Qf3#
      • 1...Rg8!
    • 1.Rxe8?
      • 1...exd3
        • 2.Rxe5#
        • 2.Qf3#
      • 1...c2!
    • 1.dxe4?
      • threat
        • 2.Qf3#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Rf8!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rxe4#
      • 1...Kxd4
        • 2.Qa7#
      • 1...exd3
        • 2.Qf4#
      • 1...exd4
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD,P_SPINP(d),XP(C)::QAR1(G)
  • Tries
    • Try
      • R(F);P_PINP(c),XP(d)
      • Threat
        • QAR1(G)
      • Vars
        • R(e);N_GUARD::R1(F),XP(c)
      • Refutation
        • R(e);N_SPINP(c),XR(F)
    • Try
      • R(F);
      • Threat
        • R(F)
      • Vars
        • P(c);N_GUARD,XP(C)::QAR1(G)
      • Refutation
        • R(e);
    • Try
      • R(F);XR(e)
      • Refutation
        • P(a);
    • Try
      • P(C);XP(c)
      • Threat
        • QAR1(G)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(d),XP(C)::QAB1(G)
      • Refutation
        • R(e);
  • Actual
    • R(E);
    • Threat
      • R1(E),XP(c)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(E)::QAB(G)
      • P(c);P_SPINP(d),XP(C)::QAB1(G)
      • P(d);P_SPINP(c),SBLOCK,XR(E)::QAR1(G)
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