MESON Chess Problem Database

Problem Display
PID: 263448 (2B4K/B5p1/5N2/4k3/8/8/8/7Q w - - 0 1)

Romanov, V

Zadachi i Etyudi, 2009

2B4K/B5p1/5N2/4k3/8/8/8/7Q

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qe4+?
      • 1...Kd6
        • 2.Se8#
      • 1...Kxf6!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Sh5#
      • 1...Kxf6!
    • 1.Qh4?
      • threat
        • 2.Bb8#
        • 2.Qd4#
      • 1...gxf6
        • 2.Qd4#
      • 1...g5
        • 2.Qd4#
      • 1...Kd6!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qd4#
      • 1...Kf4
        • 2.Qe3#
      • 1...Kd6
        • 2.Qc5#
      • 1...Kxf6
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(B)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);SBLOCK,XS(B)::QAB1(A)
        • P(b);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • K(a);OGATEB,S_FLIGHT,XS(B)::QAB1(A),XP(b)
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