MESON Chess Problem Database

Problem Display
PID: 19117 (7N/8/8/R2NkPP1/8/7n/7K/3Q4 w - - 0 1)

Gold, Samuel

Pittsburgh Leader, 1912

7N/8/8/R2NkPP1/8/7n/7K/3Q4

#2

7 + 2

1829 The Theory of Pawn Promotion 1912

SOLUTION

  • SOUND
  • Tries
    • 1.Qg4?
      • threat
        • 2.Sf7#
      • 1...Sxg5
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Kd6!
  • Keys
    • 1.Qa4!
      • 1...Kxf5
        • 2.Sc7#
      • 1...Kd6
        • 2.Sf7#
      • 1...Sxg5
        • 2.Qf4#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sf2
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • S(G)
      • Vars
        • S(a);N_GUARD,XP(F)::QAB1(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT,XP(E)::R(C)+S(D)
      • K(b);S_FLIGHT::S(G)
      • S(a);N_GUARD,XP(F)::QAB1(A)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
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