MESON Chess Problem Database

Problem Display
PID: 85789 (8/8/8/8/8/1K4NN/3k4/6Q1 w - - 0 1)

Speckmann, Werner

Der Tagesspiegel (Berlin), 1987

8/8/8/8/8/1K4NN/3k4/6Q1

#2

4 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf5?
      • 1...Kd3
        • 2.Qe3#
      • 1...Ke2!
    • 1.Qf2+?
      • 1...Kc1
        • 2.Qe1#
        • 2.Qc2#
      • 1...Kd3
        • 2.Sf4#
      • 1...Kd1!
    • 1.Qe3+?
      • 1...Kd1
        • 2.Sf2#
      • 1...Kxe3!
    • 1.Qc5?
      • 1...Ke1
        • 2.Qc1#
      • 1...Kd3
        • 2.Qc3#
      • 1...Kd1!
    • 1.Qc1+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kxc1!
    • 1.Qe1+?
      • 1...Kd3
        • 2.Qc3#
      • 1...Kxe1!
  • Keys
    • 1.Qa1!
      • 1...Kd3
        • 2.Qc3#
      • 1...Ke3
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::S(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAR2(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAR2(A)
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