MESON Chess Problem Database

Problem Display
PID: 19347 (k1K3Q1/2p5/8/1N6/8/8/2r1p3/8 w - - 0 1)

Speckmann, Werner

Kieler Nachrichten, 1963

k1K3Q1/2p5/8/1N6/8/8/2r1p3/8

#2

3 + 4

3295 Einfuhrung in die Welt des Schachproblem 1984

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qa2#
    • 1...Ra2
      • 2.Kxc7#
      • 2.Qxa2#
    • 1...Rb2
      • 2.Kxc7#
    • 1...Rc5
      • 2.Qa2#
    • 1...c5
      • 2.Kc7#
      • 2.Qd5#
      • 2.Qg2#
    • 1...c6
      • 2.Kc7#
  • Tries
    • 1.Qd5+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...c6!
    • 1.Qe6?
      • threat
        • 2.Qa6#
      • 1...Ra2
        • 2.Qxa2#
        • 2.Qc6#
      • 1...Rc6
        • 2.Qxc6#
      • 1...c6!
    • 1.Qg2+?
      • 1...Rc6
        • 2.Qxc6#
      • 1...c6!
    • 1.Qg6?
      • threat
        • 2.Qa6#
      • 1...Ra2
        • 2.Qc6#
      • 1...Rc6
        • 2.Qxc6#
      • 1...c6!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qa7#
      • 1...Ra2
        • 2.Sxc7#
      • 1...Rc5
        • 2.Qa1#
      • 1...c5
        • 2.Qh1#
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAR(C)
    • R(a);::QAR(C)+K(B),XP(c)
    • P(c);::QAR(C)+K(B)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(C),XR(a)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • R(a);N_GUARD::QAB(C),XR(a)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(C),XR(a)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • R(a);N_GUARD::QAB(C)
        • R(a);N_GUARD::QAB(C),XR(a)
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • R(a);N_GUARD::S(A),XP(c)
      • R(a);N_GUARD::QAB(C)
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