MESON Chess Problem Database

Problem Display
PID: 157663 (8/2N5/1r1p4/k7/1p3Q2/1K6/8/8 w - - 0 1)

Paslack, Rainer

Deutsche Schachzeitung, 1969

8/2N5/1r1p4/k7/1p3Q2/1K6/8/8

#2

3 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxb4#
    • 1...Rc6
      • 2.Qxb4#
  • Tries
    • 1.Qe5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...d5
        • 2.Qa1#
      • 1...dxe5!
    • 1.Qg5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...d5!
    • 1.Qxd6?
      • 1...Rc6
        • 2.Qxb4#
      • 1...Rb5
        • 2.Qa6#
      • 1...Ra6
        • 2.Qxb4#
        • 2.Qc5#
        • 2.Qxa6#
      • 1...Rb7
        • 2.Qa6#
      • 1...Rb8
        • 2.Qa6#
      • 1...Rxd6!
    • 1.Qc4?
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ra6
        • 2.Qb5#
        • 2.Qxa6#
        • 2.Qxb4#
      • 1...Rc6
        • 2.Qb5#
        • 2.Qxb4#
      • 1...Rb7
        • 2.Qa6#
      • 1...Rb8
        • 2.Qa6#
      • 1...d5!
    • 1.Qd4?
      • threat
        • 2.Qa1#
      • 1...Ra6
        • 2.Qxb4#
      • 1...Rb5
        • 2.Qa7#
      • 1...Rc6
        • 2.Qxb4#
      • 1...Rb8
        • 2.Qa7#
      • 1...Rb7!
    • 1.Qf5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...d5!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qa1#
      • 1...Rb5
        • 2.Qxb5#
      • 1...Ra6
        • 2.Qb5#
        • 2.Qxa6#
      • 1...Rc6
        • 2.Qb5#
      • 1...Rb7
        • 2.Qa6#
      • 1...Rb8
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::QAB1(B),XP(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(B),XR(c)
        • P(d);P_SPINP(d)::QAR(B)
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(B),XR(c)
      • Refutation
        • P(d);P_SPINP(d)
    • Try
      • Q(B);XP(d)
      • Vars
        • R(c);N_GUARD::QAB1(B),XP(a)
        • R(c);OGATE::QAR1(B)
      • Refutation
        • R(c);XQ(B)
    • Try
      • Q(B);
      • Vars
        • R(c);N_GUARD::QAR1(B),XR(c)
        • R(c);N_GUARD::QAR1(B)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • QAR(B)
      • Vars
        • R(c);N_GUARD::QAB1(B),XP(a)
        • R(c);OGATE::QAR2(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(B),XR(c)
      • Refutation
        • P(d);P_SPINP(d)
  • Actual
    • Q(B);
    • Threat
      • QAR(B)
    • Vars
      • R(c);N_GUARD::QAR1(B),XR(c)
      • R(c);N_GUARD::QAR1(B)
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