MESON Chess Problem Database

Problem Display
PID: 231779 (4Q3/1k6/8/8/B4B2/8/1K6/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1970

4Q3/1k6/8/8/B4B2/8/1K6/8

#2

4 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Bb5?
      • threat
        • 2.Qb8#
      • 1...Ka7
        • 2.Qb8#
      • 1...Kb6!
    • 1.Be3?
      • 1...Ka6
        • 2.Qb5#
        • 2.Qa8#
      • 1...Kc7!
    • 1.Qb5+?
      • 1...Ka8
        • 2.Qa6#
        • 2.Qb8#
      • 1...Kc8
        • 2.Qd7#
        • 2.Qb8#
      • 1...Ka7!
    • 1.Qe6?
      • 1...Ka8
        • 2.Qa6#
      • 1...Ka7!
  • Keys
    • 1.Bb8!
      • 1...Ka6
        • 2.Qb5#
      • 1...Kb6
        • 2.Qb5#
      • 1...Ka8
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(C);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(a);S_FLIGHT::QAR2(D)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(C);
    • Vars
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::B(B)
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