MESON Chess Problem Database

Problem Display
PID: 95037 (B7/8/8/Q7/3k4/8/8/2NK4 w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Krimskaya Pravda, 1975

B7/8/8/Q7/3k4/8/8/2NK4

#2

4 + 1

6490 yacpdb 2009
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qd2#
  • Tries
    • 1.Ke1?
      • 1...Ke3
        • 2.Qd2#
        • 2.Qe5#
      • 1...Kc4!
    • 1.Kc2?
      • threat
        • 2.Qc3#
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
    • 1.Bh1?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
    • 1.Bg2?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
    • 1.Bd5?
      • 1...Ke3
        • 2.Qd2#
      • 1...Ke5!
    • 1.Bc6?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
    • 1.Bb7?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4!
    • 1.Qb4+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Ke5!
    • 1.Qb5?
      • 1...Kc3
        • 2.Se2#
      • 1...Ke3!
    • 1.Qd5+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc3!
  • Keys
    • 1.Sa2!
      • threat
        • 2.Qc3#
      • 1...Kd3
        • 2.Qc3#
      • 1...Ke3
        • 2.Qd2#
      • 1...Kc4
        • 2.Qd5#

Anticipated by 224225(1887)

FEATURES

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