MESON Chess Problem Database

Problem Display
PID: 272962 (4k3/3rPr2/2Q3K1/1N5N/8/8/8/8 w - - 0 1)

Zickermann, Albert

Die Schwalbe, 1932

4k3/3rPr2/2Q3K1/1N5N/8/8/8/8

#2

5 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qa8+?
      • 1...Rd8
        • 2.Qxd8#
        • 2.exd8Q#
      • 1...Kxe7!
    • 1.Qc8+?
      • 1...Rd8
        • 2.Qxd8#
        • 2.exd8Q#
      • 1...Kxe7!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxf7#
      • 1...Rf6+
        • 2.Sxf6#
      • 1...Rg7+
        • 2.Sxg7#
      • 1...Rdxe7
        • 2.Qc8#
      • 1...Rfxe7
        • 2.Qg8#
      • 1...Rd1
        • 2.Sc7#
      • 1...Rd2
        • 2.Sc7#
      • 1...Rd3
        • 2.Sc7#
      • 1...Rd4
        • 2.Sc7#
      • 1...Rd5
        • 2.Sc7#
      • 1...Rd6
        • 2.Sxd6#
        • 2.Sc7#
      • 1...Ra7
        • 2.Sd6#
      • 1...Rb7
        • 2.Sd6#
      • 1...Rc7
        • 2.Sd6#
        • 2.Sxc7#
      • 1...Rd8
        • 2.Sc7#
      • 1...Rf1
        • 2.Sg7#
      • 1...Rf2
        • 2.Sg7#
      • 1...Rf3
        • 2.Sg7#
      • 1...Rf4
        • 2.Sg7#
      • 1...Rf5
        • 2.Sg7#
      • 1...Rh7
        • 2.Sf6#
      • 1...Rf8
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);CHECK,N_PINR(a)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK,N_PINR(a)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
  • Actual
    • Q(C);N_PINR(a)
    • Threat
      • QAB1(C),XR(b)
    • Vars
      • R(b);CHECK,N_GUARD::S(B),XR(b)
      • R(a);OGATE,P_SPINR(a),SBLOCK,XP(E)::QAR2(C)
      • R(b);OGATE,P_SPINR(b),SBLOCK,XP(E)::QAR2(C)
      • R(a);N_GUARD::S(A)
      • R(b);N_GUARD::S(B)
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