MESON Chess Problem Database

Problem Display
PID: 153305 (2N5/1Qp5/8/8/2k5/2P5/2R1K3/8 w - - 0 1)

Mosiashvili, Givi

StrateGems, 2012

2N5/1Qp5/8/8/2k5/2P5/2R1K3/8

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Sd6#
  • Tries
    • 1.Sa7?
      • threat
        • 2.Qb5#
      • 1...Kc5
        • 2.Qc6#
      • 1...c5
        • 2.Qf7#
      • 1...c6!
    • 1.Se7?
      • threat
        • 2.Qd5#
        • 2.Qb4#
      • 1...Kc5
        • 2.Qc6#
        • 2.Qb4#
      • 1...c6
        • 2.Qb4#
      • 1...c5!
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qc6#
      • 1...Kxc3
        • 2.Qb4#
      • 1...Kc5
        • 2.Qb5#
      • 1...c6
        • 2.Qxc6#
      • 1...c5
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,SBLOCK::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • P(b);OGATE,SBLOCK::QAB(D)
      • Refutation
        • P(b);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(D)
      • Refutation
        • P(b);
  • Actual
    • R(A);
    • Threat
      • QAR2(D)
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAB1(D)
      • K(a);P-FLIGHT::QAR1(D)
      • P(b);::QAR2(D),XP(b)
      • P(b);SBLOCK::QAB1(D)
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