MESON Chess Problem Database

Problem Display
PID: 135640 (8/6Q1/5PR1/8/8/8/5Knp/7k w - - 0 1)

Lincoln, Robert A

3rd Comm., Amirov MT, 2008

8/6Q1/5PR1/8/8/8/5Knp/7k

#2

4 + 3

145 StrateGems 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Rh6?
      • threat
        • 2.Qxg2#
      • 1...Se1
        • 2.Qg1#
      • 1...Se3
        • 2.Qg1#
      • 1...Sf4
        • 2.Qg1#
      • 1...Sh4!
    • 1.Qh8?
      • 1...Se1
        • 2.Rg1#
      • 1...Se3
        • 2.Rg1#
      • 1...Sf4
        • 2.Rg1#
      • 1...Sh4!
    • 1.Qe7?
      • 1...Se1
        • 2.Qxe1#
      • 1...Sf4
        • 2.Qe1#
      • 1...Sh4
        • 2.Qe1#
      • 1...Se3!
    • 1.Qh7?
      • 1...Se1
        • 2.Rg1#
      • 1...Se3
        • 2.Rg1#
      • 1...Sf4
        • 2.Rg1#
      • 1...Sh4!
  • Keys
    • 1.Qh6!
      • 1...Se1
        • 2.Rg1#
      • 1...Se3
        • 2.Rg1#
      • 1...Sf4
        • 2.Rg1#
      • 1...Sh4
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);P_PINP(c)
      • Threat
        • QAB1(D),XS(b)
      • Vars
        • S(b);OGATE::QAR1(D)
      • Refutation
        • S(b);N_SPINP(c)
    • Try
      • Q(D);P_PINP(c)
      • Vars
        • S(b);OGATE::R1(C)
      • Refutation
        • S(b);N_SPINP(c)
    • Try
      • Q(D);
      • Vars
        • S(b);N_GUARD::QAR(D),XS(b)
        • S(b);N_GUARD::QAR(D)
      • Refutation
        • S(b);
    • Try
      • Q(D);P_PINP(c)
      • Vars
        • S(b);OGATE::R1(C)
      • Refutation
        • S(b);N_SPINP(c)
  • Actual
    • Q(D);P_PINP(c)
    • Vars
      • S(b);OGATE::R1(C)
      • S(b);N_GUARD,N_SPINP(c)::QAR(D)
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