MESON Chess Problem Database

Problem Display
PID: 142218 (K7/2N4p/8/2P1kpP1/1Q3N1r/3P1p1P/p2P4/q7 w - - 0 1)

Lane, Henry Fitzgerald William

British Chess Magazine, 1903

K7/2N4p/8/2P1kpP1/1Q3N1r/3P1p1P/p2P4/q7

#2

9 + 7

14867 BCPS Library 2011
14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.Sg6#
    • 1...h6
      • 2.Sg6#
  • Tries
    • 1.Sce6?
      • threat
        • 2.Qb8#
      • 1...Qb2
        • 2.Qxb2#
      • 1...Qd4
        • 2.Qxd4#
      • 1...Qb1
        • 2.Qc3#
        • 2.Qd4#
      • 1...Rxf4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Sb5#
        • 2.Sce6#
      • 1...Kd4
        • 2.Sce6#
      • 1...Kxf4
        • 2.Se6#
      • 1...Rxf4
        • 2.Qh8#
      • 1...Qb2
        • 2.Sb5#
      • 1...Qd4
        • 2.Scd5#
      • 1...Qb1
        • 2.Sb5#
      • 1...Rh6
        • 2.Sce6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • P(g);N_GUARD::S(E)
  • Tries
    • Try
      • S(H);
      • Threat
        • QAB(D)
      • Vars
        • Q(a);N_GUARD::QAB(D),XQ(a)
        • Q(a);N_GUARD::QAB1(D),XQ(a)
      • Refutation
        • R(d);XS(E)
  • Actual
    • Q(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);S_FLIGHT::S(H)
      • K(e);S_FLIGHT,XS(E)::QAB(D)+S(H),DCHECK
      • R(d);SBLOCK,XS(E)::QAB(D)
      • Q(a);::QAB(D)+S(H)
      • Q(a);SBLOCK::QAB(D)+S(H)
      • R(d);::QAB(D)+S(H)
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