MESON Chess Problem Database

Problem Display
PID: 231777 (R7/Bp6/k2p4/6Q1/3K4/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1970

R7/Bp6/k2p4/6Q1/3K4/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...b6
        • 2.Qxb6#
      • 1...Kb5!
    • 1.Qc5?
      • threat
        • 2.Bb6#
        • 2.Bb8#
        • 2.Qb6#
      • 1...b5
        • 2.Qb6#
      • 1...b6
        • 2.Qxb6#
      • 1...dxc5+!
  • Keys
    • 1.Qd5!
      • 1...b5
        • 2.Bc5#
      • 1...b6
        • 2.Bb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);::QAR1(B),XP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);::QAR1(B)
        • P(c);::QAR1(B),XP(c)
      • Refutation
        • P(b);CHECK,XQ(B)
  • Actual
    • Q(B);
    • Vars
      • P(c);SBLOCK::R(D)+B(C)
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