MESON Chess Problem Database

Problem Display
PID: 138750 (8/6p1/6p1/3K2nR/6kN/6P1/6Q1/8 w - - 0 1)

Neyndorff, Luke

StrateGems, 2010

8/6p1/6p1/3K2nR/6kN/6P1/6Q1/8

#2

5 + 4

3713 Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sh3
      • 2.Qf3#
  • Tries
    • 1.Qf3+?
      • 1...Kh3
        • 2.Sxg6#
      • 1...Sxf3!
  • Keys
    • 1.Sf5!
      • 1...Kxf5
        • 2.Qf3#
      • 1...Kxh5
        • 2.g4#
      • 1...gxf5
        • 2.Rh4#
      • 1...gxh5
        • 2.Se3#
      • 1...Sf3
        • 2.Qh3#
      • 1...Sh3
        • 2.Qe2#
      • 1...Se4
        • 2.Qe2#
      • 1...Se6
        • 2.Qe2#
      • 1...Sf7
        • 2.Qe2#
      • 1...Sh7
        • 2.Qe2#

Anticipated by 45960(2002)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R(E)+S(C),XP(c)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • S(C);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT,XS(C)::QAR2(A)
      • K(a);OGATE,S_FLIGHT,XR(E)::P(B)
      • P(c);SBLOCK,XS(C)::R1(E)
      • P(c);SBLOCK,XR(E)::S(C)
      • S(b);N_GUARD,SBLOCK::QAB1(A)
      • S(b);N_GUARD::QAB(A)
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