MESON Chess Problem Database

Problem Display
PID: 43570 (1N2q3/4p3/3PkP2/7B/2N2R2/2n5/6Q1/4bK2 w - - 0 1)

Rice, John Michael

British Chess Magazine, 2002

1N2q3/4p3/3PkP2/7B/2N2R2/2n5/6Q1/4bK2

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qg8#
    • 1...Qb5
      • 2.Qg8#
    • 1...Qc6
      • 2.Qg8#
    • 1...Qd7
      • 2.Qg8#
    • 1...Qf7
      • 2.Bg4#
    • 1...Qg8
      • 2.Qxg8#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sa2
      • 2.Qe4#
    • 1...Se2
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sb5
      • 2.Qe4#
    • 1...Sd5
      • 2.Qh3#
      • 2.Qe4#
      • 2.Qg4#
  • Tries
    • 1.Qe2+?
      • 1...Kd5
        • 2.Qe5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxe2!
    • 1.Qg8+?
      • 1...Qf7
        • 2.Bxf7#
        • 2.Qxf7#
      • 1...Qxg8!
    • 1.d7?
      • threat
        • 2.Qc6#
      • 1...Qxh5
        • 2.d8S#
      • 1...Qxd7
        • 2.Qg8#
      • 1...exf6
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Qg6
        • 2.d8S#
      • 1...Se4
        • 2.Qxe4#
      • 1...Qc8
        • 2.dxc8Q#
        • 2.dxc8B#
      • 1...Sb5
        • 2.Qe4#
      • 1...Sd5
        • 2.Qh3#
        • 2.Qe4#
        • 2.Qg4#
      • 1...Qxb8!
  • Keys
    • 1.f7!
      • threat
        • 2.Bg4#
      • 1...Qxf7
        • 2.Bxf7#
      • 1...exd6
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Se4
        • 2.Qxe4#
      • 1...Qb5
        • 2.f8S#
      • 1...Qg8
        • 2.fxg8Q#
        • 2.fxg8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(e);N_GUARD::QAB(B)
    • Q(e);N_GUARD,P_PINS(C)::QAB(B)
    • Q(e);SBLOCK::B(E)
    • Q(e);N_GUARD::QAB(B),XQ(e)
    • S(b);N_GUARD::QAR2(B)
    • S(b);N_GUARD::QAR2(B),XS(b)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR1(B)
        • S(b);N_GUARD,P_SPINS(b)::QAR2(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • Q(e);XQ(B)
    • Try
      • P(F);
      • Threat
        • QAR2(B)
      • Vars
        • Q(e);N_GUARD,XB(E)::P=S
        • Q(e);N_GUARD,XP(F)::QAB(B)
        • P(d);XP(G)::PXQ(e)=Q
        • Q(e);N_GUARD::P=S
        • S(b);N_GUARD::QAR2(B),XS(b)
        • Q(e);OGATE::PXQ(e)=Q
        • S(b);N_GUARD::QAR2(B)
      • Refutation
        • Q(e);XS(H)
  • Actual
    • P(G);
    • Threat
      • B(E)
    • Vars
      • Q(e);OGATE,P_PINR(D),XP(G)::B(E),XQ(e)
      • P(d);XP(F)::PXQ(e)=Q
      • S(b);N_GUARD::QAR2(B),XS(b)
      • Q(e);N_GUARD,P_PINS(C)::P=S
      • Q(e);OGATE::PXQ(e)=Q
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