MESON Chess Problem Database

Problem Display
PID: 240015 (q7/1r6/8/8/2Q5/k1N5/N7/K7 w - - 0 1)

Maleika, Gerhard

Die Schwalbe, 1971

q7/1r6/8/8/2Q5/k1N5/N7/K7

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxa4#
    • 1...Qb8
      • 2.Qa4#
    • 1...Qc8
      • 2.Qa4#
    • 1...Qd8
      • 2.Qa4#
    • 1...Qf8
      • 2.Qa4#
    • 1...Qg8
      • 2.Qa4#
    • 1...Qh8
      • 2.Qa4#
    • 1...Rb1+
      • 2.Sxb1#
    • 1...Rb4
      • 2.Qxb4#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Ra7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Rc7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Rd7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Re7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Rf7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Rg7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
    • 1...Rh7
      • 2.Sb1#
      • 2.Sb5#
      • 2.Qb4#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Sb1#
      • 1...Qh8
        • 2.Qa4#
      • 1...Rxb5!
    • 1.Qc5+?
      • 1...Rb4
        • 2.Qxb4#
      • 1...Kb3!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Sc2#
      • 1...Rxb4
        • 2.Qa2#
      • 1...Qa4
        • 2.Sb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::QAR1(D),XQ(c)
    • Q(c);N_GUARD::QAR1(D)
    • Q(c);N_GUARD,P_PINS(C)::QAR1(D)
    • R(b);CHECK,N_GUARD::S(C),XR(b)
    • R(b);N_GUARD::QAB1(D),XR(b)
    • R(b);N_GUARD::S(C),XR(b)
  • Tries
    • Try
      • Q(D);
      • Threat
        • S(C)
      • Vars
        • Q(c);N_GUARD,P_PINS(C)::QAR1(D)
      • Refutation
        • R(b);XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(D),XR(b)
      • Refutation
        • K(a);P-FLIGHT,P_PINS(B)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • R(b);SBLOCK,XS(B)::QAR1(D)
      • Q(c);SBLOCK::S(C)
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