MESON Chess Problem Database

Problem Display
PID: 239201 (8/8/1B6/3p3K/1Q6/8/4kp2/2R5 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Problemist Pribuzhya, 1991

8/8/1B6/3p3K/1Q6/8/4kp2/2R5

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qg4#
  • Tries
    • 1.Rc2+?
      • 1...Kd1
        • 2.Qd2#
        • 2.Qb1#
      • 1...Kd3
        • 2.Rd2#
      • 1...Kf3
        • 2.Qg4#
      • 1...Kf1!
    • 1.Qc3?
      • threat
        • 2.Qe3#
      • 1...f1S
        • 2.Re1#
      • 1...d4!
    • 1.Qe7+?
      • 1...Kd2
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe3#
      • 1...Kf3!
    • 1.Qb2+?
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3!
    • 1.Qb3?
      • threat
        • 2.Qd1#
        • 2.Qe3#
      • 1...Kd2
        • 2.Qd1#
        • 2.Qc2#
        • 2.Qe3#
      • 1...f1Q
        • 2.Qe3#
      • 1...f1S
        • 2.Qd1#
      • 1...f1R
        • 2.Qe3#
      • 1...d4!
    • 1.Qc4+?
      • 1...Kd2
        • 2.Qc2#
      • 1...Kf3
        • 2.Qg4#
      • 1...dxc4!
    • 1.Qe4+?
      • 1...Kd2
        • 2.Qc2#
        • 2.Qe3#
      • 1...dxe4!
    • 1.Qg4+?
      • 1...Kd2
        • 2.Qd1#
      • 1...Kd3!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qe3#
        • 2.Qd1#
      • 1...Kf3
        • 2.Qg4#
      • 1...f1Q
        • 2.Qe3#
      • 1...f1S
        • 2.Qd1#
      • 1...f1R
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(B)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(A)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);N_GUARD::R1(A)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • P(b);::QAR1(B)
      • P(b);::QAB1(B)
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