MESON Chess Problem Database

Problem Display
PID: 234515 (8/n7/Q7/8/8/3n2K1/8/6Nk w - - 0 1)

Speckmann, Werner

Problemas, 1964

8/n7/Q7/8/8/3n2K1/8/6Nk

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Se2?
      • threat
        • 2.Qh6#
      • 1...Sf4
        • 2.Qa1#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sf2!
    • 1.Sf3?
      • threat
        • 2.Qh6#
      • 1...Sf2
        • 2.Qf1#
      • 1...Sf4
        • 2.Qf1#
        • 2.Qa1#
      • 1...Sc6!
    • 1.Qb7+?
      • 1...Kxg1
        • 2.Qg2#
      • 1...Sc6!
    • 1.Qc6+?
      • 1...Kxg1
        • 2.Qg2#
      • 1...Sxc6!
  • Keys
    • 1.Sh3!
      • 1...Sc1
        • 2.Qf1#
      • 1...Se1
        • 2.Qf1#
      • 1...Sb2
        • 2.Qf1#
      • 1...Sf2
        • 2.Qf1#
      • 1...Sb4
        • 2.Qf1#
        • 2.Qa1#
      • 1...Sf4
        • 2.Qf1#
        • 2.Qa1#
      • 1...Sc5
        • 2.Qf1#
        • 2.Qa1#
      • 1...Se5
        • 2.Qf1#
        • 2.Qa1#
      • 1...Sb5
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR(C)
      • Vars
        • S(b);N_GUARD::QAB1(C)
        • S(c);N_GUARD::QAB(C),XS(c)
      • Refutation
        • S(b);
    • Try
      • S(A);
      • Threat
        • QAR(C)
      • Vars
        • S(b);OGATE::QAR2(C)
      • Refutation
        • S(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(A)::QAR1(C)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(A)::QAR1(C)
      • Refutation
        • S(c);XQ(C)
  • Actual
    • S(A);
    • Vars
      • S(b);OGATE::QAR2(C)
      • S(c);N_GUARD::QAB(C),XS(c)
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