MESON Chess Problem Database

Problem Display
PID: 243832 (8/8/8/8/8/4Q3/P1k3p1/4R1Kb w - - 0 1)

Chepizhni, Viktor Ivanovich

64 Shakhmatnoe obozrenie, 1997

8/8/8/8/8/4Q3/P1k3p1/4R1Kb

#2

4 + 3

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb2
      • 2.Qb3#
  • Tries
    • 1.Rd1?
      • threat
        • 2.Qc1#
        • 2.Qd2#
        • 2.Qb3#
      • 1...Kb2
        • 2.Qb3#
      • 1...Kxd1!
    • 1.Re2+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kb1!
    • 1.Qd3+?
      • 1...Kb2
        • 2.Qb3#
      • 1...Kxd3!
    • 1.Qf3?
      • 1...Kb2
        • 2.Qb3#
      • 1...Kd2!
    • 1.Qg3?
      • 1...Kb2
        • 2.Qb3#
      • 1...Kd2!
    • 1.Qh3?
      • 1...Kb2
        • 2.Qb3#
      • 1...Kd2!
  • Keys
    • 1.Ra1!
      • 1...Kb2
        • 2.Qc1#

Anticipated by 231102(1927)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(D)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT,XR(A)
    • Try
      • R(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT,XQ(D)
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);P-FLIGHT::QAB1(D)
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