MESON Chess Problem Database

Problem Display
PID: 224481 (8/8/K2p1q2/nBkp4/3NbPQ1/P7/1P6/3n4 w - - 0 1)

Ehrenstein, Moritz

Philadelphia Times, 1888

8/8/K2p1q2/nBkp4/3NbPQ1/P7/1P6/3n4

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Se6#
    • 1...Qg5
      • 2.Se6#
    • 1...Qg7
      • 2.Se6#
    • 1...Qd8
      • 2.Se6#
    • 1...Qh8
      • 2.Se6#
    • 1...Qxf4
      • 2.Se6#
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qf8
      • 2.Se6#
    • 1...Sb3
      • 2.Sxb3#
    • 1...Sc4
      • 2.Sb3#
    • 1...Sc6
      • 2.Sb3#
    • 1...Sb7
      • 2.Sb3#
  • Tries
    • 1.Qc8+?
      • 1...Sc6
        • 2.Sb3#
      • 1...Kxd4!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qa7#
      • 1...Kxd4
        • 2.Qa7#
      • 1...Qxg7
        • 2.Se6#
      • 1...Qe7
        • 2.b4#
      • 1...Qd8
        • 2.Se6#
        • 2.b4#
      • 1...Qf7
        • 2.b4#
      • 1...Sc4
        • 2.Sb3#
      • 1...Sc6
        • 2.Sb3#
      • 1...Sb7
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(g);N_GUARD::S(C)
    • Q(g);N_GUARD,XP(D)::S(C)
    • Q(g);N_GUARD::S(C),XQ(g)
    • S(c);N_GUARD::S(C),XS(c)
    • S(c);N_GUARD::S(C)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);P_SPINS(c)::S(C)
      • Refutation
        • K(d);S_FLIGHT,XS(C)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • K(d);P_SPINQ(g),S_FLIGHT,XS(C)::QAB(E)
      • Q(g);N_GUARD,XQ(E)::S(C)
      • Q(g);::P(A)
      • S(c);N_GUARD::S(C)
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Developed and maintained by Brian Stephenson.
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