MESON Chess Problem Database

Problem Display
PID: 141907 (8/1p6/p7/8/kP6/1pPQ4/1K6/8 w - - 0 1)

Matthaus, Hans Georg

Deutsche Schachzeitung, 1987

8/1p6/p7/8/kP6/1pPQ4/1K6/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...b6
      • 2.Qxa6#
  • Tries
    • 1.Qf1?
      • 1...b5
        • 2.Qa1#
      • 1...b6
        • 2.Qxa6#
      • 1...a5!
    • 1.Qd5?
      • threat
        • 2.Qa5#
      • 1...a5
        • 2.Qxa5#
      • 1...b5
        • 2.Qxb3#
      • 1...b6!
  • Keys
    • 1.Qc4!
      • 1...a5
        • 2.b5#
      • 1...b5
        • 2.Qxb3#
      • 1...b6
        • 2.Qxa6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);N_GUARD::QAR2(C),XP(c)
  • Tries
    • Try
      • Q(C);
      • Vars
        • P(d);SBLOCK::QAR(C)
        • P(d);N_GUARD::QAR2(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • P(c);::QAR1(C),XP(c)
        • P(d);SBLOCK::QAB1(C),XP(a)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Vars
      • P(c);SBLOCK::QAR(C)+P(D)
      • P(d);SBLOCK::QAB1(C),XP(a)
      • P(d);N_GUARD::QAR2(C),XP(c)
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