MESON Chess Problem Database

Problem Display
PID: 201746 (4B3/8/8/3k1K2/Q2P4/3p4/3P4/8 w - - 0 1)

Speckmann, Werner

Stern, 1971

4B3/8/8/3k1K2/Q2P4/3p4/3P4/8

#2

5 + 2

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd7#
  • Tries
    • 1.Kf4?
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6!
    • 1.Kg4?
      • 1...Ke4
        • 2.Bc6#
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6!
    • 1.Kf6?
      • 1...Kd6
        • 2.Qc6#
        • 2.Qd7#
      • 1...Ke4!
    • 1.Kg6?
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#
      • 1...Ke4!
    • 1.Qb5+?
      • 1...Kd6
        • 2.Qd7#
        • 2.Qc5#
        • 2.Qe5#
      • 1...Kxd4!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kxc4!
    • 1.Qa7?
      • threat
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#
        • 2.Qd7#
      • 1...Kc4!
  • Keys
    • 1.Kg5!
      • 1...Ke4
        • 2.Bc6#
      • 1...Kd6
        • 2.Qd7#
      • 1...Ke6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::B(E)
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(D);S_FLIGHT
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT,XP(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • K(D);P-FLIGHT
    • Vars
      • K(b);S_FLIGHT::B(E)
      • K(b);P-FLIGHT::QAR1(B)
      • K(b);S_FLIGHT::QAB1(B)
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