MESON Chess Problem Database

Problem Display
PID: 269857 (4K3/Q3R3/8/4N3/3pk3/6P1/8/3B4 w - - 0 1)

Eltsov, Aleksandr Ivanovich

64 Shakhmatnoe obozrenie, 2023

4K3/Q3R3/8/4N3/3pk3/6P1/8/3B4

#2

6 + 2

5454 Near Snap 2023

SOLUTION

  • SOUND
  • Tries
    • 1.Qxd4+?
      • 1...Kf5
        • 2.Qf4#
      • 1...Kxd4!
    • 1.Qa3?
      • threat
        • 2.Qf3#
      • 1...Kd5
        • 2.Bf3#
      • 1...d3
        • 2.Qxd3#
      • 1...Kf5!
    • 1.Qa5?
      • 1...Ke3
        • 2.Qe1#
      • 1...d3
        • 2.Sf3#
        • 2.Sc6#
      • 1...Kf5!
    • 1.Qd7?
      • 1...d3
        • 2.Sxd3#
        • 2.Sf3#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sg6#
        • 2.Sf7#
        • 2.Qxd3#
      • 1...Ke3!
  • Keys
    • 1.Qa6!
      • 1...Ke3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qc6#
      • 1...Kf5
        • 2.Qg6#
      • 1...d3
        • 2.Qxd3#

Anticipated by 250462(2009), 267422(2013), 257526(2021)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);CHECK,XP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • K(b);N_GUARD,S_FLIGHT::B(A)
        • P(a);::QAB1(D),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR2(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Vars
      • K(b);N_GUARD,P-FLIGHT::QAR1(D)
      • K(b);N_GUARD,S_FLIGHT::QAB1(D)
      • P(a);::QAB1(D),XP(a)
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