MESON Chess Problem Database

Problem Display
PID: 104377 (8/8/3K4/8/8/5Bk1/6NN/6Q1 w - - 0 1)

Ljubomirovic, Dragan

Mat, 1984

8/8/3K4/8/8/5Bk1/6NN/6Q1

#2

5 + 1

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sf4+?
      • 1...Kh4
        • 2.Qg4#
      • 1...Kxf4!
    • 1.Sf1+?
      • 1...Kh3
        • 2.Qh2#
        • 2.Qh1#
      • 1...Kxf3!
    • 1.Sg4?
      • 1...Kh3
        • 2.Qh2#
      • 1...Kxf3!
    • 1.Qf2+?
      • 1...Kxh2
        • 2.Sf4#
      • 1...Kh3
        • 2.Sf4#
        • 2.Qh4#
      • 1...Kxf2!
    • 1.Qd4?
      • threat
        • 2.Qh4#
      • 1...Kh3
        • 2.Qh4#
      • 1...Kxh2!
    • 1.Qe1+?
      • 1...Kh3
        • 2.Qh4#
      • 1...Kxh2!
  • Keys
    • 1.Qh1!
      • 1...Kf2
        • 2.Qe1#
      • 1...Kh3
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • S(C);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(C)::QAR(A)+S(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);P-FLIGHT::QAR(A)+S(C)
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