MESON Chess Problem Database

Problem Display
PID: 107062 (4K3/8/8/QP1Nk3/1P2pN1P/8/3P2P1/8 w - - 0 1)

Keidanski, Theodore Hermann

Deutsches Wochenschach, 1892

4K3/8/8/QP1Nk3/1P2pN1P/8/3P2P1/8

#2

9 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc7#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qf6#
      • 1...Kf5
        • 2.Qe6#
      • 1...e3!
    • 1.Qc7+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kf5!
    • 1.Qa1+?
      • 1...Kd6
        • 2.Qf6#
      • 1...Kf5!
  • Keys
    • 1.Se3!
      • 1...Kd4
        • 2.Qa1#
      • 1...Kxf4
        • 2.Qc7#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(b);P-FLIGHT::QAB1(F)
      • Refutation
        • P(a);
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(F)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(H);
    • Vars
      • K(b);S_FLIGHT::QAB(F)
      • K(b);S_FLIGHT,XS(D)::QAB(F)
      • K(b);S_FLIGHT::S(H)
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