MESON Chess Problem Database

Problem Display
PID: 85684 (8/8/8/Q7/8/3K4/p3N3/1k6 w - - 0 1)

Speckmann, Werner

The Problemist, 1990

8/8/8/Q7/8/3K4/p3N3/1k6

#2

3 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sc3+?
      • 1...Ka1
        • 2.Qxa2#
      • 1...Kc1
        • 2.Qa3#
      • 1...Kb2!
    • 1.Qc3?
      • threat
        • 2.Qc1#
      • 1...a1Q
        • 2.Qc2#
      • 1...a1B
        • 2.Qc2#
      • 1...a1R
        • 2.Qc2#
        • 2.Qb3#
      • 1...a1S!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Qc1#
      • 1...Ka1
        • 2.Qc1#
      • 1...a1Q
        • 2.Qc2#
      • 1...a1S
        • 2.Sc3#
      • 1...a1B
        • 2.Qc2#
      • 1...a1R
        • 2.Sc3#
        • 2.Qc2#

This is a version of 85685

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(b)::QAR1(C),XP(b)
        • K(a);P-FLIGHT::QAB(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(b);SBLOCK::QAB1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);P-FLIGHT::QAR2(C)
      • P(b);SBLOCK::QAB1(C)
      • P(b);SBLOCK::S(A)
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