MESON Chess Problem Database

Problem Display
PID: 137111 (8/1Bp1B3/QR1Pk3/1P2N3/5K2/8/Pp6/8 w - - 0 1)

Maleika, Gerhard

Sp. Prize, Hartong MT, 1989

8/1Bp1B3/QR1Pk3/1P2N3/5K2/8/Pp6/8

#2

9 + 3

145 StrateGems 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Qa4?
      • threat
        • 2.Qb3#
        • 2.Qc4#
      • 1...b1Q
        • 2.Qc4#
      • 1...b1R
        • 2.Qc4#
      • 1...c5
        • 2.Qc4#
      • 1...cxd6!
    • 1.Qa8?
      • threat
        • 2.Bd5#
        • 2.Bc8#
        • 2.Qc8#
        • 2.Qg8#
      • 1...c6
        • 2.Qg8#
      • 1...cxd6!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qb3#
        • 2.Qh3#
        • 2.dxc7#
      • 1...cxb6
        • 2.Qb3#
        • 2.Qh3#
      • 1...cxd6
        • 2.Qxd6#
      • 1...c6
        • 2.Qb3#
      • 1...b1Q
        • 2.dxc7#
      • 1...b1B
        • 2.Qb3#
        • 2.dxc7#
      • 1...b1R
        • 2.Qh3#
        • 2.dxc7#
      • 1...c5
        • 2.Qh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAB(E)
        • P(c);::QAB(E)
      • Refutation
        • P(c);P_SPINP(c),XP(G)
    • Try
      • Q(E);
      • Threat
        • DUALS(4)
      • Vars
        • P(c);::QAB(E)
      • Refutation
        • P(c);P_SPINP(c),XP(G)
  • Actual
    • Q(E);
    • Threat
      • DUALS(3)
    • Vars
      • P(c);OGATE,P_SPINP(c),XP(G)::QAR1(E),XP(c)
      • P(c);::QAB(E)
      • P(a);::R(F)+P(G),XP(c)
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