MESON Chess Problem Database

Problem Display
PID: 9410 (k1B5/3N4/2n5/1N6/8/6KQ/8/8 w - - 0 1)

Bernard, Henry D'Oyly

HM., Norwich Mercury, 1902-1903

k1B5/3N4/2n5/1N6/8/6KQ/8/8

#2

5 + 2

2012 Miniature Chess Problems from Many Countries 1981
3713 Snap 2009
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sa7
      • 2.Sc7#
    • 1...Sb8
      • 2.Sb6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sa5
        • 2.Qa6#
      • 1...Se5
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sa7
        • 2.Sc7#
      • 1...Se7
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sd8
        • 2.Qa2#
        • 2.Qa6#
      • 1...Sb4!
    • 1.Qh6?
      • threat
        • 2.Qxc6#
      • 1...Sd4
        • 2.Qa6#
      • 1...Sa5
        • 2.Qa6#
      • 1...Se5
        • 2.Qa6#
      • 1...Sa7
        • 2.Sc7#
      • 1...Se7
        • 2.Qa6#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sd8
        • 2.Qa6#
      • 1...Sb4!
  • Keys
    • 1.Qh8!
      • 1...Sb4
        • 2.Ba6#
      • 1...Sd4
        • 2.Ba6#
      • 1...Sa5
        • 2.Ba6#
      • 1...Se5
        • 2.Ba6#
      • 1...Sa7
        • 2.Sc7#
      • 1...Se7
        • 2.Qa1#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sd8
        • 2.Qa1#

This anticipates 249052(1947), 93378(1956)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::S(C)
    • S(a);SBLOCK::S(D)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB(B),XS(a)
      • Vars
        • S(a);OGATE::QAR2(B)
        • S(a);SBLOCK::S(C)
        • S(a);SBLOCK::S(D)
      • Refutation
        • S(a);
    • Try
      • Q(B);
      • Threat
        • QAB(B),XS(a)
      • Vars
        • S(a);OGATE::QAR2(B)
        • S(a);SBLOCK::S(C)
        • S(a);SBLOCK::S(D)
      • Refutation
        • S(a);
  • Actual
    • Q(B);
    • Vars
      • S(a);N_GUARD::QAR(B)+B(E)
      • S(a);SBLOCK::S(C)
      • S(a);N_GUARD::QAB(B)
      • S(a);SBLOCK::S(D)
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