MESON Chess Problem Database

Problem Display
PID: 78390 (3nB3/2qn4/2r4R/2p1PkNp/7K/3P4/4N2Q/5r2 w - - 0 1)

Shire, David J

Australian Chess, 2004

3nB3/2qn4/2r4R/2p1PkNp/7K/3P4/4N2Q/5r2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Qh3#
    • 1...Ra1
      • 2.Qf4#
    • 1...Rb1
      • 2.Qf4#
    • 1...Rc1
      • 2.Qf4#
    • 1...Rd1
      • 2.Qf4#
    • 1...Re1
      • 2.Qf4#
    • 1...Rg1
      • 2.Qf4#
    • 1...Rf4+
      • 2.Qxf4#
    • 1...Rg6
      • 2.Bxg6#
    • 1...Sf6
      • 2.Bg6#
    • 1...Se6
      • 2.Bg6#
    • 1...c4
      • 2.Sd4#
  • Tries
    • 1.Bxd7+?
      • 1...Re6
        • 2.Rf6#
      • 1...Se6
        • 2.Rf6#
      • 1...Qxd7!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sg7#
      • 1...Rf4+
        • 2.Qxf4#
      • 1...Qxe5
        • 2.Qh3#
      • 1...Rxe6
        • 2.Rxh5#
      • 1...Sxe5
        • 2.Sg3#
      • 1...Sxe6
        • 2.Bg6#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Rg1
        • 2.Qf4#
      • 1...Sb6
        • 2.Rf6#
      • 1...Sb8
        • 2.Rf6#
      • 1...Sf8
        • 2.Rf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(f);SBLOCK,XP(E)::QAB(B)
    • R(a);N_GUARD::QAR1(B)
    • R(a);CHECK,N_GUARD::QAR1(B),XR(a)
    • R(e);N_GUARD::B(H),XR(e)
    • S(g);S_CUTR(e)::B(H)
    • S(h);S_CUTR(e)::B(H)
    • P(b);N_GUARD::S(A)
  • Tries
    • Try
      • B(H);CHECK,XS(g)
      • Vars
        • R(e);P_SPINR(e)::R1(G)
        • S(h);P_SPINS(h)::R1(G)
      • Refutation
        • Q(f);XB(H)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(a);CHECK,N_GUARD::QAR1(B),XR(a)
      • Q(f);SBLOCK,XP(E)::QAB(B)
      • R(e);SBLOCK,XS(F)::R(G),XP(d)
      • S(g);SBLOCK,XP(E)::S(A)
      • S(h);SBLOCK,XS(F)::B(H)
      • S(g);N_GUARD::R1(G),XS(g)
      • R(a);N_GUARD::QAR1(B)
      • S(g);N_GUARD::R1(G)
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