MESON Chess Problem Database

Problem Display
PID: 245088 (5N1k/7P/5nQ1/7n/8/8/8/4K3 w - - 0 1)

Froberg, Johan Hilding Laurentius

Smena (Moscow), 1995

5N1k/7P/5nQ1/7n/8/8/8/4K3

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qxf6#
    • 1...Sf4
      • 2.Qxf6#
    • 1...Se4
      • 2.Qg8#
    • 1...Sg4
      • 2.Qg8#
    • 1...Sd5
      • 2.Qg8#
    • 1...Sd7
      • 2.Qg8#
    • 1...Sxh7
      • 2.Qxh7#
    • 1...Se8
      • 2.Qg8#
    • 1...Sg8
      • 2.Qxg8#
      • 2.hxg8Q#
      • 2.hxg8R#
  • Tries
    • 1.Kd1?
      • 1...Sxh7
        • 2.Qxh7#
      • 1...Sg3
        • 2.Qxf6#
      • 1...Sf4
        • 2.Qxf6#
      • 1...Se4
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sd5
        • 2.Qg8#
      • 1...Sd7
        • 2.Qg8#
      • 1...Se8
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Sg7!
    • 1.Se6?
      • 1...Sg7
        • 2.Qxg7#
      • 1...Sg3
        • 2.Qg7#
      • 1...Sf4
        • 2.Qg7#
      • 1...Se4
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#
      • 1...Sd5
        • 2.Qg8#
      • 1...Sd7
        • 2.Qg8#
      • 1...Se8
        • 2.Qg8#
      • 1...Sg8
        • 2.Qxg8#
        • 2.hxg8Q#
        • 2.hxg8R#
      • 1...Sxh7!
    • 1.Qf7?
      • threat
        • 2.Sg6#
      • 1...Sf4
        • 2.Qxf6#
      • 1...Sg7!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Sg6#
      • 1...Sxh7
        • 2.Qxh7#
      • 1...Sf4
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD::QAB(B),XS(b)
    • S(b);N_GUARD::QAR1(B)
    • S(b);OGATE,XP(C)::QAR1(B),XS(b)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);OGATE,XP(C)::QAR1(B),XS(b)
        • S(a);N_GUARD::QAB(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • S(a);
    • Try
      • S(D);
      • Vars
        • S(a);N_GUARD::QAB1(B),XS(a)
        • S(a);N_GUARD::QAB1(B)
        • S(b);N_GUARD::QAR1(B)
      • Refutation
        • S(b);XP(C)
    • Try
      • Q(B);
      • Threat
        • S(D)
      • Vars
        • S(a);N_GUARD::QAB(B),XS(b)
      • Refutation
        • S(a);
  • Actual
    • Q(B);
    • Threat
      • S(D)
    • Vars
      • S(b);OGATE,P_SPINS(b),XP(C)::QAR1(B),XS(b)
      • S(a);N_GUARD::QAB(B),XS(b)
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