MESON Chess Problem Database

Problem Display
PID: 218036 (k7/1R6/K7/8/2n5/8/Q7/8 w - - 0 1)

Munz, Rupert

Deutsche Schachzeitung, 1980

k7/1R6/K7/8/2n5/8/Q7/8

#2

3 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qg8#
    • 1...Sd2
      • 2.Kb6#
      • 2.Qg8#
    • 1...Sa3
      • 2.Qg8#
    • 1...Se3
      • 2.Kb6#
      • 2.Qg8#
    • 1...Sa5
      • 2.Qg8#
    • 1...Se5
      • 2.Kb6#
      • 2.Qg8#
    • 1...Sb6
      • 2.Kxb6#
    • 1...Sd6
      • 2.Kb6#
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qh8#
      • 1...Sd6
        • 2.Kb6#
      • 1...Se5
        • 2.Kb6#
      • 1...Sb6
        • 2.Kxb6#
      • 1...Sb2!
    • 1.Qf2?
      • threat
        • 2.Qa7#
        • 2.Qf8#
      • 1...Sd6
        • 2.Qa7#
      • 1...Se3
        • 2.Qf8#
      • 1...Sb6!
    • 1.Qg2?
      • threat
        • 2.Rb1#
        • 2.Rb2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Qg8#
      • 1...Sb2
        • 2.Rxb2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Qg8#
      • 1...Sd2
        • 2.Qg8#
      • 1...Se3
        • 2.Qg8#
      • 1...Sa5
        • 2.Qg8#
      • 1...Se5
        • 2.Qg8#
      • 1...Sb6
        • 2.Rxb6#
      • 1...Sd6!
    • 1.Qh2?
      • threat
        • 2.Ra7#
        • 2.Rb8#
        • 2.Qb8#
        • 2.Qh8#
      • 1...Se5
        • 2.Qh8#
      • 1...Sb6
        • 2.Ra7#
        • 2.Rb8#
        • 2.Qb8#
      • 1...Sd6!
    • 1.Qa3?
      • threat
        • 2.Qf8#
      • 1...Sd6
        • 2.Kb6#
      • 1...Sb6
        • 2.Kxb6#
      • 1...Sxa3!
    • 1.Qa5?
      • threat
        • 2.Qd8#
      • 1...Sd6
        • 2.Kb6#
      • 1...Sb6
        • 2.Kxb6#
      • 1...Sxa5!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Qe8#
      • 1...Sd6
        • 2.Kb6#
      • 1...Sb6
        • 2.Kxb6#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE::QAR(A)
    • S(a);::QAR(A)+K(B),XS(a)
    • S(a);::QAR(A)+K(B)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(a);::QAR(A)+K(B)
        • S(a);::QAR(A)+K(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR1(A)
        • S(a);::QAR(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(7)
      • Vars
        • S(a);::QAR(A)
        • S(a);::QAB(A)+R(C),XS(a)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(a);::QAR(A)+K(B)
        • S(a);::QAR(A)+K(B),XS(a)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(a);::QAR(A)+K(B)
        • S(a);::QAR(A)+K(B),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(a);::QAR(A)+K(B)
      • S(a);::QAR(A)+K(B),XS(a)
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