MESON Chess Problem Database

Problem Display
PID: 146693 (K7/nQp4p/2R1P2r/3k1N2/p2Pp3/8/8/8 w - - 0 1)

Willmott, Arthur

British Chess Magazine, 1983

K7/nQp4p/2R1P2r/3k1N2/p2Pp3/8/8/8

#2

6 + 7

1085 Australian Chess Problem Magazine 1993

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe6
      • 2.Rc5#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sc8
      • 2.Qb5#
  • Tries
    • 1.Rc1+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Rc2+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Rc3+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...c6
        • 2.Qd7#
      • 1...Kxe6!
    • 1.Rxc7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxe6!
    • 1.Qb3+?
      • 1...Kxc6
        • 2.Qb7#
      • 1...axb3!
    • 1.Qxa7?
      • threat
        • 2.Se7#
        • 2.Qc5#
      • 1...Kxc6
        • 2.Qc5#
        • 2.Qb7#
      • 1...Rxe6
        • 2.Rc5#
        • 2.Qc5#
      • 1...e3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Rxe6
        • 2.Rc5#
      • 1...Sxc6
        • 2.Qa2#
      • 1...e3
        • 2.Qg2#
      • 1...Sc8
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);SBLOCK,XP(D)::QAB(E)+R(C),DCHECK
    • S(e);N_GUARD::QAR2(E),XS(e)
    • S(e);N_GUARD::QAR2(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
        • P(f);OGATE,P_SPINP(f)::QAR2(E)
      • Refutation
        • K(c);S_FLIGHT,XP(D)
    • Try
      • R(C);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
        • P(f);OGATE,P_SPINP(f)::QAR2(E)
      • Refutation
        • K(c);S_FLIGHT,XP(D)
    • Try
      • R(C);CHECK
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
        • P(f);OGATE,P_SPINP(f)::QAR2(E)
      • Refutation
        • K(c);S_FLIGHT,XP(D)
    • Try
      • R(C);CHECK,XP(f)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
      • Refutation
        • K(c);S_FLIGHT,XP(D)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(E)
      • Refutation
        • P(a);XQ(E)
    • Try
      • Q(E);XS(e)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(E)
      • R(d);SBLOCK,XP(D)::R1(C)
      • S(e);SBLOCK,XR(C)::QAB(E)
      • P(b);OGATEB::QAB(E)
      • S(e);N_GUARD::QAR2(E)
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