MESON Chess Problem Database

Problem Display
PID: 147086 (8/5K2/8/3n1k2/3Q3P/7b/6P1/8 w - - 0 1)

Lincoln, Robert A

Australian Chess Problem Magazine TT, 1996

8/5K2/8/3n1k2/3Q3P/7b/6P1/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qe5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kxe5!
    • 1.Qxd5+?
      • 1...Kg4
        • 2.Qg5#
      • 1...Kf4!
  • Keys
    • 1.g3!
      • 1...Sf4
        • 2.Qxf4#
      • 1...Bf1
        • 2.g4#
      • 1...Bg2
        • 2.g4#
      • 1...Bg4
        • 2.Qxd5#
      • 1...Sc3
        • 2.Qf4#
      • 1...Se3
        • 2.Qf4#
      • 1...Sb4
        • 2.Qf4#
      • 1...Sb6
        • 2.Qf4#
      • 1...Sf6
        • 2.Qf4#
      • 1...Sc7
        • 2.Qf4#
      • 1...Se7
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK,XS(b)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • P(A);
    • Vars
      • S(b);N_GUARD::QAR1(B),XS(b)
      • B(a);N_GUARD::P(A)
      • B(a);SBLOCK::QAR2(B),XS(b)
      • S(b);N_GUARD::QAR1(B)
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