MESON Chess Problem Database

Problem Display
PID: 145061 (3K4/3N3Q/3p4/3k4/5pP1/1P1p1N2/3P4/8 w - - 0 1)

Steif, Adolf

Deutsche Schachzeitung, 1887

3K4/3N3Q/3p4/3k4/5pP1/1P1p1N2/3P4/8

#2

7 + 4

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qf5#
      • 2.Qg8#
  • Tries
    • 1.Ke8?
      • 1...Ke6
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qg8#
        • 2.Qf7#
      • 1...Kc6!
    • 1.Sg5?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Kc6!
    • 1.Sb8?
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qf5#
      • 1...Kc5!
    • 1.Qxd3+?
      • 1...Ke6
        • 2.Sg5#
        • 2.Qf5#
      • 1...Kc6!
  • Keys
    • 1.Qh1!
      • 1...Ke4
        • 2.Sf6#
      • 1...Kc6
        • 2.Sd4#
      • 1...Ke6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(c);P-FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(E);
      • Threat
        • QAR2(F)
      • Vars
        • K(c);S_FLIGHT::QAB1(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(F);CHECK,XP(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(F);
    • Vars
      • K(c);S_FLIGHT::S(E)
      • K(c);S_FLIGHT::QAB(F)+S(C),DCHECK
      • K(c);S_FLIGHT::S(C)
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