MESON Chess Problem Database

Problem Display
PID: 235145 (4N3/3pk3/3N4/8/5K1p/8/8/7Q w - - 0 1)

Akimov, Nikolai Nikolaevich

Schach, 2019

4N3/3pk3/3N4/8/5K1p/8/8/7Q

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qe4#
    • 1...Kd8
      • 2.Qxh4#
  • Tries
    • 1.Qg2?
      • 1...Ke6
        • 2.Qe4#
      • 1...Kd8
        • 2.Qg5#
      • 1...Kf8
        • 2.Qg7#
      • 1...h3!
    • 1.Qd5?
      • 1...Kd8
        • 2.Qg5#
      • 1...Kf8
        • 2.Qf7#
      • 1...h3!
    • 1.Qe1+?
      • 1...Kd8
        • 2.Qxh4#
      • 1...Kf8!
    • 1.Qh3?
      • 1...Kd8
        • 2.Qxh4#
      • 1...Kf8!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qf6#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kd8
        • 2.Qf6#
      • 1...Kf8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::QAR2(A)
    • K(c);S_FLIGHT::QAB(A),XP(a)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • K(c);S_FLIGHT::QAB(A)
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB(A)
        • K(c);S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB(A),XP(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);S_FLIGHT::QAB(A),XP(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • K(c);S_FLIGHT::QAB(A)
      • K(c);S_FLIGHT::QAB1(A)
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