MESON Chess Problem Database

Problem Display
PID: 166862 (8/p7/8/2Q5/k7/3K4/8/N7 w - - 0 1)

Speckmann, Werner

Deutsche Schachblatter, 1952

8/p7/8/2Q5/k7/3K4/8/N7

#2

3 + 2

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Kc4?
      • threat
        • 2.Qb4#
        • 2.Qxa7#
      • 1...a6
        • 2.Qb4#
      • 1...a5!
    • 1.Qc4+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Ka5!
    • 1.Qb5+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kxb5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qb4#
      • 1...Kb3
        • 2.Qa3#
      • 1...a5
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(C)
      • Refutation
        • P(b);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
  • Actual
    • S(A);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);S_FLIGHT::QAR1(C)
      • P(b);SBLOCK::QAR2(C)
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