MESON Chess Problem Database

Problem Display
PID: 75257 (8/K2p3Q/2k5/8/4R3/3N4/2B5/8 w - - 0 1)

Lincoln, Robert A

Magadanskaya Pravda, 2005

8/K2p3Q/2k5/8/4R3/3N4/2B5/8

#2

5 + 2

145 StrateGems 2007
56 The Problemist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Qb7#
  • Tries
    • 1.Ba4+?
      • 1...Kd6
        • 2.Qxd7#
      • 1...Kc7
        • 2.Qxd7#
      • 1...Kd5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qc5#
      • 1...Kb5
        • 2.Qc5#
      • 1...Kd5
        • 2.Sb4#
      • 1...Kc7
        • 2.Rc4#
      • 1...d5
        • 2.Ba4#
      • 1...d6
        • 2.Qb7#

FEATURES

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