MESON Chess Problem Database

Problem Display
PID: 146692 (4BK2/3q1P2/1R1Pk1N1/3p4/1N1p2P1/4nQ1b/8/8 w - - 0 1)

Willmott, Arthur

British Chess Magazine, 1989

4BK2/3q1P2/1R1Pk1N1/3p4/1N1p2P1/4nQ1b/8/8

#2

9 + 6

1085 Australian Chess Problem Magazine 1993

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe8+
      • 2.fxe8Q#
    • 1...Qc7
      • 2.dxc7#
    • 1...Qe7+
      • 2.dxe7#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Sd1
      • 2.Qf5#
    • 1...Sf1
      • 2.Qf5#
    • 1...Sc2
      • 2.Qf5#
    • 1...Sg2
      • 2.Qf5#
    • 1...Sc4
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
  • Tries
    • 1.Kg8?
      • threat
        • 2.f8S#
      • 1...Qxe8+
        • 2.fxe8Q#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Qe7
        • 2.dxe7#
      • 1...Qc6!
    • 1.Qf4?
      • threat
        • 2.Qe5#
      • 1...Qxe8+
        • 2.fxe8Q#
      • 1...Qxd6+
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Qe7+
        • 2.dxe7#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Sc4
        • 2.Qf5#
      • 1...Sxg4!
  • Keys
    • 1.Kg7!
      • threat
        • 2.Qf6#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Sf5+
        • 2.Qxf5#
      • 1...Qxe8
        • 2.fxe8Q#
      • 1...Sxg4
        • 2.Qxd5#
      • 1...Qe7
        • 2.dxe7#
      • 1...Qd8
        • 2.f8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(f);CHECK,OGATE,XB(H)::PXQ(f)=Q
    • Q(f);OGATE::R(D)+P(E),XQ(f)
    • Q(f);CHECK,OGATE::R(D)+P(E),XQ(f)
    • Q(f);CHECK,OGATE,XP(G)::QAB1(A),XQ(f)
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
  • Tries
    • Try
      • K(I);P-FLIGHT
      • Threat
        • P=S
      • Vars
        • Q(f);CHECK,OGATE,XB(H)::PXQ(f)=Q
        • Q(f);CHECK,OGATE,XP(G)::QAB1(A),XQ(f)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • Q(f);OGATE::R(D)+P(E),XQ(f)
      • Refutation
        • Q(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(f);CHECK,OGATE,XB(H)::PXQ(f)=Q
        • Q(f);CHECK,OGATE::R(D)+P(E),XQ(f)
        • Q(f);CHECK,OGATE,XP(G)::QAB1(A),XQ(f)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • S(a);XP(C)
  • Actual
    • K(I);P_SPINP(G),S_FLIGHT
    • Threat
      • QAR1(A)
    • Vars
      • Q(f);CHECK,OGATE,XP(G)::QAB1(A),XQ(f)
      • S(a);CHECK,N_GUARD::QAB1(A),XS(a)
      • Q(f);N_PINP(G),XB(H)::PXQ(f)=Q
      • S(a);N_GUARD,XP(C)::QAB1(A),XP(d)
      • Q(f);OGATE::R(D)+P(E),XQ(f)
      • Q(f);N_PINP(G)::P=S
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