MESON Chess Problem Database

Problem Display
PID: 135227 (5B2/2n2n2/1pN2P2/1PpkPB2/3pN3/8/bK2Qpq1/8 w - - 0 1)

Shire, David J

7th HM., The Problemist, 2009

5B2/2n2n2/1pN2P2/1PpkPB2/3pN3/8/bK2Qpq1/8

#2

9 + 9

56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Se7#
    • 1...d3
      • 2.Qxd3#
  • Tries
    • 1.Sxc5?
      • threat
        • 2.Sb4#
      • 1...bxc5
        • 2.Se7#
      • 1...d3
        • 2.Qxd3#
      • 1...Qe4
        • 2.Bxe4#
      • 1...Sa6
        • 2.Be6#
      • 1...Sd6!
    • 1.Sg5?
      • threat
        • 2.Se7#
      • 1...d3
        • 2.Qxd3#
      • 1...Qe4
        • 2.Bxe4#
      • 1...c4
        • 2.Sb4#
      • 1...Sxe5!
    • 1.Sd6?
      • threat
        • 2.Se7#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...d3
        • 2.Qxd3#
      • 1...c4!
    • 1.Bd6?
      • threat
        • 2.Se7#
      • 1...d3
        • 2.Qxd3#
      • 1...Sxd6!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Se7#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...d3
        • 2.Qxd3#
      • 1...c4
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(i);SBLOCK,XP(E)::S(G)
    • P(d);OGATEB::QAR2(B),XP(d)
  • Tries
    • Try
      • S(C);XP(e)
      • Threat
        • S(G)
      • Vars
        • P(g);SBLOCK,XS(C)::S(G)
        • P(d);OGATEB::QAR2(B),XP(d)
        • Q(c);N_GUARD::B(F),XQ(c)
        • S(h);N_GUARD::B(F)
      • Refutation
        • S(i);
    • Try
      • S(C);
      • Threat
        • S(G)
      • Vars
        • P(d);OGATEB::QAR2(B),XP(d)
        • Q(c);N_GUARD::B(F),XQ(c)
        • P(e);N_GUARD::S(G)
      • Refutation
        • S(i);XP(E)
    • Try
      • S(C);
      • Threat
        • S(G)
      • Vars
        • S(i);OGATE,XP(E)::QAR1(B),XS(i)
        • Q(c);N_GUARD::QAB1(B),XQ(c)
        • P(d);OGATEB::QAR2(B),XP(d)
      • Refutation
        • P(e);
    • Try
      • B(I);
      • Threat
        • S(G)
      • Vars
        • P(d);OGATEB::QAR2(B),XP(d)
      • Refutation
        • S(i);XB(I)
  • Actual
    • S(C);
    • Threat
      • S(G)
    • Vars
      • S(i);OGATE,XP(E)::QAR1(B),XS(i)
      • Q(c);N_GUARD::QAB1(B),XQ(c)
      • P(d);OGATEB::QAR2(B),XP(d)
      • P(e);N_GUARD::S(G)
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