MESON Chess Problem Database

Problem Display
PID: 245573 (4N3/8/8/2p5/K2k4/6N1/4Q3/b7 w - - 0 1)

Slesarenko, Anatoly Vasilevich

Smena, 1999

4N3/8/8/2p5/K2k4/6N1/4Q3/b7

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qe4#
    • 1...Bc3
      • 2.Qe4#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Qe4#
      • 1...Kd5
        • 2.Qe4#
      • 1...c4+!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qe4#
        • 2.Qd6#
      • 1...Kxd3!
  • Keys
    • 1.Qd2+!
      • 1...Kc4
        • 2.Sd6#
      • 1...Ke5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::QAB1(A)
    • B(a);SBLOCK::QAR1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);CHECK
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);CHECK
    • Vars
      • K(b);P-FLIGHT::S(D)
      • K(b);OGATE,S_FLIGHT::QAB1(A)
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