MESON Chess Problem Database

Problem Display
PID: 209318 (8/8/8/7n/7p/5K1k/6N1/6QB w - - 0 1)

Lewis, Robert Tony

The Problemist, 1984

8/8/8/7n/7p/5K1k/6N1/6QB

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...Sf6
      • 2.Sf4#
    • 1...Sg7
      • 2.Sf4#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qxh4#
      • 1...Sg3
        • 2.Sf4#
      • 1...Kh2!
  • Keys
    • 1.Sxh4!
      • 1...Kxh4
        • 2.Qg4#
      • 1...Sg3
        • 2.Qxg3#
      • 1...Sf4
        • 2.Qg3#
      • 1...Sf6
        • 2.Qg3#
      • 1...Sg7
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD::S(C)
    • S(c);N_GUARD::S(C),XS(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • S(c);N_GUARD::S(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);XP(b)
    • Vars
      • K(a);P-FLIGHT,XS(C)::QAR1(A)
      • S(c);N_GUARD::QAR1(A),XS(c)
      • S(c);N_GUARD::QAR1(A)
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