MESON Chess Problem Database

Problem Display
PID: 260576 (4N3/8/7p/5Pp1/6k1/3P4/4P3/Q3BK2 w - - 0 1)

Eltsov, Aleksandr Ivanovich

64 Shakhmatnoe obozrenie, 2022

4N3/8/7p/5Pp1/6k1/3P4/4P3/Q3BK2

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kh5
      • 2.Sf6#
  • Tries
    • 1.Qd4+?
      • 1...Kxf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Sf6#
        • 2.Sg7#
      • 1...Kh3!
    • 1.Qe5?
      • 1...Kh3
        • 2.Qg3#
      • 1...Kh5
        • 2.Sf6#
      • 1...h5!
    • 1.Qa4+?
      • 1...Kxf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Sf6#
        • 2.Sg7#
      • 1...Kh3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qf3#
      • 1...Kh3
        • 2.Qg2#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kxf5
        • 2.Qe4#
      • 1...Kh5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);N_GUARD,S_FLIGHT::S(G)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);N_GUARD,S_FLIGHT::QAR1(A)
        • K(a);N_GUARD,S_FLIGHT::S(G)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT,XP(F)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::QAB1(A)
      • K(a);N_GUARD,P-FLIGHT::QAR1(A)
      • K(a);N_GUARD,S_FLIGHT,XP(F)::QAB1(A)
      • K(a);N_GUARD,S_FLIGHT::S(G)
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