MESON Chess Problem Database

Problem Display
PID: 270465 (1B6/8/8/1Q6/4k3/3N4/8/5K2 w - - 0 1)

Koshel, Mikhail Igorevich

64 Shakhmatnoe obozrenie, 2023

1B6/8/8/1Q6/4k3/3N4/8/5K2

#2

4 + 1

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1?
      • threat
        • 2.Qd3#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd4!
    • 1.Se1?
      • threat
        • 2.Qd3#
        • 2.Qe5#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kd4!
    • 1.Sf2+?
      • 1...Ke3
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
        • 2.Qd3#
        • 2.Qb3#
      • 1...Kd4!
    • 1.Sb4?
      • threat
        • 2.Qd3#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd4!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Bf4#
      • 1...Kxd5!
    • 1.Qe5+?
      • 1...Kf3
        • 2.Qf4#
        • 2.Qe2#
      • 1...Kxd3!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Qd3#
      • 1...Ke3
        • 2.Qd3#
      • 1...Kf3
        • 2.Qe2#
      • 1...Kd4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
        • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::B(D)
      • Refutation
        • K(a);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • S(B);
    • Threat
      • QAB1(C)
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • K(a);N_GUARD,S_FLIGHT::QAB1(C)
      • K(a);N_GUARD,P-FLIGHT::QAB1(C)
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