MESON Chess Problem Database

Problem Display
PID: 185165 (8/8/8/5Q2/6np/7k/7n/6KN w - - 0 1)

Holm, Karl Helmer

Springaren, 1948

8/8/8/5Q2/6np/7k/7n/6KN

#2

3 + 4

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Qxf1#
    • 1...Sf3+
      • 2.Qxf3#
  • Tries
    • 1.Qd3+?
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Se3!
    • 1.Qe4?
      • threat
        • 2.Qg2#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Se3!
    • 1.Qd5?
      • threat
        • 2.Qg2#
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Se3!
  • Keys
    • 1.Qf4!
      • 1...Sf3+
        • 2.Qxf3#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Se3
        • 2.Sf2#
      • 1...Se5
        • 2.Sf2#
      • 1...Sf6
        • 2.Sf2#
      • 1...Sh6
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB(C),XS(a)
    • S(a);CHECK,N_GUARD::QAR2(C),XS(a)
  • Tries
    • Try
      • Q(C);CHECK,N_PINS(c)
      • Vars
        • S(a);CHECK,N_GUARD,P_SPINS(a)::QAR2(C),XS(a)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);N_PINS(c)
      • Threat
        • QAB1(C)
      • Vars
        • S(a);CHECK,N_GUARD::QAR2(C),XS(a)
      • Refutation
        • S(c);
    • Try
      • Q(C);N_PINS(c)
      • Threat
        • QAB1(C)
      • Vars
        • S(a);CHECK,N_GUARD::QAR2(C),XS(a)
      • Refutation
        • S(c);
  • Actual
    • Q(C);N_PINS(c)
    • Vars
      • S(a);CHECK,N_GUARD::QAR2(C),XS(a)
      • S(a);N_GUARD::QAB(C),XS(a)
      • S(c);N_GUARD::S(B),XS(c)
      • S(c);N_GUARD::S(B)
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