MESON Chess Problem Database

Problem Display
PID: 250731 (7b/8/4p3/7Q/1N4K1/2pNk3/3r2B1/2B5 w - - 0 1)

Dittrich, Stefan

Deutsche Schachzeitung, 1984

7b/8/4p3/7Q/1N4K1/2pNk3/3r2B1/2B5

#2

6 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke2
      • 2.Kf4#
    • 1...Kd4
      • 2.Qc5#
    • 1...Be5
      • 2.Qxe5#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Ke2!
    • 1.Qf7?
      • threat
        • 2.Qf2#
      • 1...Ke2
        • 2.Qf3#
      • 1...Kd4
        • 2.Qf4#
      • 1...Bf6!
    • 1.Qh3+?
      • 1...Ke2
        • 2.Qf3#
      • 1...Kd4!
    • 1.Qd5?
      • threat
        • 2.Qe4#
      • 1...Ke2
        • 2.Qf3#
      • 1...exd5!
    • 1.Qf5?
      • threat
        • 2.Qe4#
        • 2.Qf2#
      • 1...Ke2
        • 2.Qf3#
      • 1...Kd4
        • 2.Qe4#
        • 2.Qf4#
        • 2.Qc5#
      • 1...exf5+!
    • 1.Qg5+?
      • 1...Kd4
        • 2.Qf4#
        • 2.Qc5#
      • 1...Ke2!
    • 1.Qh6+?
      • 1...Kd4
        • 2.Qf4#
      • 1...Ke2!
    • 1.Qh7?
      • threat
        • 2.Qe4#
      • 1...Kd4
        • 2.Qe4#
      • 1...Ke2!
    • 1.Qxh8?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Ke2!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf2#
      • 1...Ke2
        • 2.Qe1#
      • 1...Kd4
        • 2.Kf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINR(a),P-FLIGHT::QAB(F)+K(E)
    • K(c);N_GUARD,N_SPINR(a),S_CUTB(e),S_FLIGHT::QAB1(F)
    • B(e);N_GUARD::QAR2(F),XB(e)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(c);N_SPINR(a),S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • K(c);N_GUARD,N_SPINR(a),P-FLIGHT::QAB1(F)
        • K(c);N_GUARD,N_SPINR(a),S_FLIGHT::QAR2(F)
      • Refutation
        • B(e);
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINR(a),P-FLIGHT::QAB1(F)
      • Refutation
        • K(c);N_SPINR(a),S_FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(c);N_GUARD,N_SPINR(a),P-FLIGHT::QAB1(F)
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_GUARD,N_SPINR(a),P-FLIGHT::QAB1(F)
      • Refutation
        • P(d);CHECK,XQ(F)
    • Try
      • Q(F);CHECK
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINR(a),S_FLIGHT::QAR2(F)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • K(c);N_SPINR(a),S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
    • Try
      • Q(F);XB(e)
      • Threat
        • QAR2(F)
      • Vars
        • P(d);::QAR2(F),XP(d)
      • Refutation
        • K(c);N_SPINR(a),P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • K(c);N_GUARD,N_SPINR(a),P-FLIGHT::QAR1(F)
      • K(c);N_SPINR(a),S_FLIGHT::QAR(F)+K(E)
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