MESON Chess Problem Database

Problem Display
PID: 232396 (8/8/8/3p4/1Qbk1K2/8/8/4B3 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1983

8/8/8/3p4/1Qbk1K2/8/8/4B3

#2

3 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd2#
  • Tries
    • 1.Kf3?
      • 1...Kd3
        • 2.Qd2#
        • 2.Qc3#
      • 1...Ke5!
    • 1.Kf5?
      • 1...Kd3
        • 2.Qd2#
      • 1...Ke3!
    • 1.Qd2+?
      • 1...Bd3
        • 2.Qc3#
      • 1...Kc5!
    • 1.Qa3?
      • threat
        • 2.Bf2#
        • 2.Qe3#
      • 1...Bf1
        • 2.Qc3#
      • 1...Ba2
        • 2.Qc3#
      • 1...Be2
        • 2.Qc3#
      • 1...Bd3
        • 2.Qc3#
      • 1...Bb5
        • 2.Qc3#
      • 1...Ba6
        • 2.Qc3#
      • 1...Bb3!
    • 1.Qb2+?
      • 1...Kd3
        • 2.Qd2#
      • 1...Kc5!
    • 1.Qa4?
      • 1...Kd3
        • 2.Qd1#
      • 1...Kc5!
  • Keys
    • 1.Qa5!
      • 1...Kd3
        • 2.Qd2#
      • 1...Bf1
        • 2.Qc3#
      • 1...Ba2
        • 2.Qc3#
      • 1...Be2
        • 2.Qc3#
      • 1...Bb3
        • 2.Qc3#
      • 1...Bb5
        • 2.Qc3#
      • 1...Ba6
        • 2.Qc3#
      • 1...Bd3
        • 2.Qc3#

This is a version of 232394

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(b);N_SPINB(a),P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINB(a)
      • Vars
        • B(a);P_SPINB(a)::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);N_PINB(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::QAB1(B)
      • Refutation
        • B(a);
    • Try
      • Q(B);CHECK,N_PINB(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);N_SPINB(a),P-FLIGHT::QAR2(B)
      • Refutation
        • K(b);N_SPINB(a),S_FLIGHT
  • Actual
    • Q(B);N_PINB(a)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • B(a);::QAB1(B)
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