MESON Chess Problem Database

Problem Display
PID: 197829 (nR6/3p4/6Q1/2k2n2/b4N2/3P4/1B6/4K3 w - - 0 1)

Hannam, F

The Observer, 1944

(First published on Sun Jun 4 1944)

nR6/3p4/6Q1/2k2n2/b4N2/3P4/1B6/4K3

#2

6 + 5

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Ba3#
    • 1...Sb6
      • 2.Qxb6#
    • 1...Sc7
      • 2.Qb6#
  • Tries
    • 1.Qf6?
      • threat
        • 2.Ba3#
      • 1...Sb6
        • 2.Qxb6#
      • 1...d6
        • 2.Qc3#
      • 1...Sd6!
  • Keys
    • 1.Qa6!
      • 1...Bb5
        • 2.Rxb5#
      • 1...Bc6
        • 2.Qa3#
      • 1...Sb6
        • 2.Qxb6#
      • 1...Bd1
        • 2.Rb5#
      • 1...Bc2
        • 2.Rb5#
      • 1...Bb3
        • 2.Rb5#
      • 1...Se3
        • 2.d4#
      • 1...Sg3
        • 2.d4#
      • 1...Sd4
        • 2.Ba3#
      • 1...Sh4
        • 2.d4#
      • 1...Sd6
        • 2.d4#
      • 1...Sh6
        • 2.d4#
      • 1...Se7
        • 2.d4#
      • 1...Sg7
        • 2.d4#
      • 1...Sc7
        • 2.Qb6#
      • 1...d5
        • 2.Se6#
      • 1...d6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::B(B)
    • S(e);N_GUARD::QAB1(E),XS(e)
    • S(e);N_GUARD::QAB1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • B(B)
      • Vars
        • S(e);N_GUARD::QAB1(E),XS(e)
        • P(d);SBLOCK::QAR2(E)
      • Refutation
        • S(c);
  • Actual
    • Q(E);
    • Vars
      • B(a);N_GUARD::R1(F),XB(a)
      • B(a);OGATE,SBLOCK::QAB(E)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • B(a);N_GUARD::R1(F)
      • S(c);N_GUARD::P(C)
      • S(c);SBLOCK::B(B)
      • S(e);N_GUARD::QAB1(E)
      • P(d);N_GUARD,SBLOCK::S(D)
      • P(d);SBLOCK::QAR1(E)
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