MESON Chess Problem Database

Problem Display
PID: 230901 (8/5p2/8/4P3/1Q2Nk2/3K3B/8/8 w - - 0 1)

Akimov, Nikolai Nikolaevich

Kudesnik, 2020

8/5p2/8/4P3/1Q2Nk2/3K3B/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qd6#
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qg3#
      • 1...Kf3
        • 2.Qf2#
        • 2.Qg3#
        • 2.Qf1#
        • 2.Qe3#
      • 1...Kxe5!
    • 1.Qd2+?
      • 1...Kf3
        • 2.Qe3#
        • 2.Qf2#
      • 1...Kxe5!
    • 1.Qd6?
      • threat
        • 2.Qf6#
      • 1...Kf3
        • 2.Qf6#
      • 1...f6
        • 2.Qxf6#
      • 1...f5!
    • 1.Qe7?
      • threat
        • 2.Qf6#
      • 1...Kf3
        • 2.Qf6#
        • 2.Qxf7#
      • 1...f6
        • 2.Qxf6#
      • 1...f5!
    • 1.Qb6?
      • threat
        • 2.Qf6#
      • 1...Kf3
        • 2.Qf2#
        • 2.Qe3#
        • 2.Qf6#
      • 1...Kxe5
        • 2.Qd6#
      • 1...f6
        • 2.Qxf6#
      • 1...f5!
  • Keys
    • 1.Qf8!
      • 1...Kf3
        • 2.Qxf7#
      • 1...Kxe5
        • 2.Qd6#
      • 1...f5
        • 2.Qxf5#
      • 1...f6
        • 2.Qxf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XP(E)::QAB1(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(a);S_FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(E)
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • P(b);::QAR2(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • P(b);::QAR2(C),XP(b)
      • Refutation
        • P(b);
    • Try
      • Q(C);
      • Threat
        • QAR2(C)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(E)::QAB1(C)
        • P(b);::QAR2(C),XP(b)
      • Refutation
        • P(b);
  • Actual
    • Q(C);P_PINP(b)
    • Vars
      • K(a);P-FLIGHT::QAR(C),XP(b)
      • K(a);N_SPINP(b),OGATEB,S_FLIGHT,XP(E)::QAB1(C)
      • P(b);OGATE::QAR1(C),XP(b)
      • P(b);OGATE::QAR2(C),XP(b)
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