MESON Chess Problem Database

Problem Display
PID: 263424 (3K4/8/8/2pk3B/2N5/1Q6/8/2N5 w - - 0 1)

Yakubovski, Cheslav

64 Shakhmatnoe obozrenie, 2022

3K4/8/8/2pk3B/2N5/1Q6/8/2N5

#2

5 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd3#
    • 1...Kc6
      • 2.Bf3#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke4!
    • 1.Se2?
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke6!
    • 1.Bf3+?
      • 1...Kd4
        • 2.Se2#
        • 2.Qd3#
      • 1...Ke6!
    • 1.Bg4?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke4!
    • 1.Bg6?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kc6
        • 2.Be4#
      • 1...Ke6!
    • 1.Bf7+?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qe3#
      • 1...Kc6
        • 2.Qb6#
      • 1...Ke4!
    • 1.Qc3?
      • 1...Ke4
        • 2.Qe5#
      • 1...Ke6
        • 2.Qe5#
      • 1...Kc6!
    • 1.Qd3+?
      • 1...Kc6
        • 2.Qd7#
      • 1...Ke6!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Ke6
        • 2.Bg4#
        • 2.Bf7#
        • 2.Qf7#
      • 1...Kxc4!
  • Keys
    • 1.Qb2!
      • 1...Kxc4
        • 2.Bf7#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Bf3#
      • 1...Ke6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,P-FLIGHT::QAR1(B)
    • K(b);N_GUARD,S_FLIGHT::B(D)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Threat
        • QAR2(B)
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB1(B)
        • K(b);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(B)
        • K(b);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(B)
        • K(b);N_GUARD,S_FLIGHT::B(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);N_GUARD,P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
  • Actual
    • Q(B);
    • Vars
      • K(b);N_GUARD,S_FLIGHT,XS(C)::B(D)
      • K(b);N_GUARD,S_FLIGHT::QAR1(B)
      • K(b);N_GUARD,S_FLIGHT::B(D)
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