MESON Chess Problem Database

Problem Display
PID: 77671 (2Q5/6K1/4N3/4k3/6P1/1N6/5P2/8 w - - 0 1)

Ackermann, Otto

Das deutsche Schach, 1933

2Q5/6K1/4N3/4k3/6P1/1N6/5P2/8

#2

6 + 1

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Sed4?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kd6!
    • 1.Sec5?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kd6!
    • 1.Sg5?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe6#
        • 2.Qc5#
      • 1...Kd6!
    • 1.Sc7?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd6!
    • 1.Sd8?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kd6!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Qf5#
      • 1...Kxe6!
  • Keys
    • 1.Sf8!
      • 1...Ke4
        • 2.Qf5#
      • 1...Kf4
        • 2.Qf5#
      • 1...Kd5
        • 2.Qe6#
      • 1...Kd6
        • 2.Qc5#

This anticipates 77281(1950), 176156(1953)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(F)
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
        • K(a);P-FLIGHT::QAB1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(F)
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(F)
        • K(a);S_FLIGHT::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT,XS(D)
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT::QAB1(F)
      • K(a);S_FLIGHT::QAR1(F)
      • K(a);S_FLIGHT::QAB1(F)
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