MESON Chess Problem Database

Problem Display
PID: 212833 (8/Q3N3/2p3p1/1p2p1Bp/1Rnpk3/4p2K/4p3/4N3 w - - 0 1)

von Alvensleben, Wichard Udo Reinhard

Schach-Echo, 1989

8/Q3N3/2p3p1/1p2p1Bp/1Rnpk3/4p2K/4p3/4N3

#2

6 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxe3#
    • 1...c5
      • 2.Qb7#
      • 2.Qa8#
  • Tries
    • 1.Qa3?
      • threat
        • 2.Qd3#
      • 1...d3
        • 2.Qxd3#
      • 1...Sb2
        • 2.Qxe3#
      • 1...Sxa3!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxc6#
      • 1...Sa5
        • 2.Qc2#
      • 1...Sb6
        • 2.Qc2#
      • 1...d3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);OGATE,P_SPINS(c)::QAR1(E),XP(b)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • P(d);P_SPINS(c)::QAB1(E),XP(d)
        • S(c);N_GUARD,P_SPINP(d)::QAR1(E),XP(b)
      • Refutation
        • S(c);P_SPINP(d),XQ(E)
  • Actual
    • Q(E);
    • Threat
      • QAB(E),XP(i)
    • Vars
      • S(c);OGATE,P_SPINP(d)::QAB(E)
      • P(d);OGATE,P_SPINS(c)::QAR1(E),XP(b)
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