MESON Chess Problem Database

Problem Display
PID: 36645 (3B4/2N5/2BkP1PQ/1P3qp1/3Pp3/K2N4/8/8 w - - 0 1)

Rice, John Michael

2nd Prize, Schach-Echo, 1973

3B4/2N5/2BkP1PQ/1P3qp1/3Pp3/K2N4/8/8

#2

10 + 4

3753 FIDE Album (1971-1973) 1978
5174 Chess Problem Spectrum 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Qf8#
    • 1...Qg4
      • 2.Qf8#
    • 1...Qxg6
      • 2.Qf8#
      • 2.Qh2#
    • 1...Qc5+
      • 2.dxc5#
    • 1...Qd5
      • 2.Qf8#
    • 1...Qe5
      • 2.Qf8#
      • 2.dxe5#
    • 1...Qf8
      • 2.Qxf8#
  • Tries
    • 1.Qg7?
      • threat
        • 2.Qd7#
        • 2.Qe7#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Qxb5
        • 2.Qd7#
      • 1...Qf6
        • 2.Qd7#
      • 1...Qf7
        • 2.Qe5#
      • 1...Qf8
        • 2.Qe5#
        • 2.Qxf8#
        • 2.Qd7#
      • 1...Qxe6!
    • 1.Qh2+?
      • 1...Qe5
        • 2.Qxe5#
        • 2.dxe5#
      • 1...Qf4!
    • 1.g7?
      • threat
        • 2.Se8#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Qxb5
        • 2.e7#
      • 1...Qg6
        • 2.Qh2#
      • 1...Qf7
        • 2.exf7#
      • 1...Qf8
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Qf6!
  • Keys
    • 1.e7!
      • threat
        • 2.e8S#
      • 1...Qc5+
        • 2.dxc5#
      • 1...Qxb5
        • 2.g7#
      • 1...Qe6
        • 2.Se8#
      • 1...Qd7
        • 2.Qh2#
      • 1...Qe5
        • 2.dxe5#
      • 1...Qf7
        • 2.gxf7#
      • 1...Qf8
        • 2.exf8Q#
        • 2.exf8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD,P_PINS(B)::QAB(H)
    • Q(b);N_GUARD::QAB(H)
    • Q(b);CHECK,OGATE::P(C),XQ(b)
    • Q(b);N_GUARD::QAB(H),XQ(b)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::P(C),XQ(b)
        • Q(b);XP(D)::QAR1(H)
        • Q(b);::QAR1(H)
        • Q(b);N_GUARD::QAB1(H)
      • Refutation
        • Q(b);XP(F)
    • Try
      • Q(H);CHECK
      • Refutation
        • Q(b);P_SPINQ(b)
    • Try
      • P(G);
      • Threat
        • S(I)
      • Vars
        • Q(b);CHECK,OGATE::P(C),XQ(b)
        • Q(b);N_GUARD,XP(D)::QAR(H)+P(F)
        • Q(b);N_GUARD::QAB(H)
        • Q(b);OGATE::QAR(H)+P(F),XQ(b)
        • Q(b);OGATE::PXQ(b)=Q
      • Refutation
        • Q(b);
  • Actual
    • P(F);
    • Threat
      • P=S
    • Vars
      • Q(b);CHECK,OGATE::P(C),XQ(b)
      • Q(b);N_GUARD,XP(D)::QAR(H)+P(G)
      • Q(b);SBLOCK::S(I)
      • Q(b);N_GUARD::QAB(H)
      • Q(b);OGATE::P(C),XQ(b)
      • Q(b);OGATE::QAR(H)+P(G),XQ(b)
      • Q(b);OGATE::PXQ(b)=Q
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