MESON Chess Problem Database

Problem Display
PID: 46101 (3BB1bQ/1R4rq/p5pp/2k1N3/n2RP3/8/1nN5/7K w - - 0 1)

Shire, David J

2nd Prize, Probleemblad, 1997

3BB1bQ/1R4rq/p5pp/2k1N3/n2RP3/8/1nN5/7K

#2

9 + 9

102 Probleemblad 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Rd5#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Bf7
      • 2.Be7#
      • 2.Qf8#
    • 1...Sd1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sc4
      • 2.Sd3#
    • 1...Sc3
      • 2.Bb6#
    • 1...Sb6
      • 2.Bxb6#
    • 1...a5
      • 2.Rb5#
  • Tries
    • 1.Ba5?
      • threat
        • 2.Bb4#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Rxb7!
    • 1.Bf7?
      • threat
        • 2.Be7#
        • 2.Rd5#
      • 1...Rxf7
        • 2.Rd5#
      • 1...Bxf7
        • 2.Be7#
        • 2.Qf8#
      • 1...Sc4
        • 2.Rd5#
      • 1...Sc3
        • 2.Be7#
      • 1...Sb6!
    • 1.Rf7?
      • threat
        • 2.Rd5#
      • 1...Bxf7
        • 2.Qf8#
      • 1...Sb6
        • 2.Be7#
      • 1...Sc3!
    • 1.Qxg7?
      • threat
        • 2.Be7#
      • 1...Sc4
        • 2.Sd3#
      • 1...Qxg7!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Be7#
      • 1...Rxf7
        • 2.Qe5#
      • 1...Sc4
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • R(g);S_CUTB(i)::R1(C)
    • B(i);N_GUARD,P_PINP(D)::R1(C),XB(i)
    • S(a);N_GUARD::S(E)
    • S(a);N_GUARD::S(E),XS(a)
    • S(b);N_GUARD::B(G)
    • S(b);N_GUARD::B(G),XS(b)
    • P(d);N_GUARD::R1(F)
  • Tries
    • Try
      • B(G);
      • Threat
        • B(G)
      • Vars
        • S(a);N_GUARD::S(E),XS(a)
      • Refutation
        • R(g);XR(F)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(g);XB(H)::R1(C)
        • S(a);::R1(C)
        • S(b);::B(G)
      • Refutation
        • S(b);
    • Try
      • R(F);
      • Threat
        • R1(C)
      • Vars
        • B(i);OGATE,XR(F)::QAB(I)
        • S(b);SBLOCK::B(G)
      • Refutation
        • S(b);
    • Try
      • Q(I);XR(g)
      • Threat
        • B(G)
      • Vars
        • S(a);N_GUARD::S(E)
      • Refutation
        • Q(h);XQ(I)
  • Actual
    • S(E);
    • Threat
      • B(G)
    • Vars
      • R(g);OGATE,XS(E)::QAR2(I)
      • S(a);SBLOCK::R1(C)
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