MESON Chess Problem Database

Problem Display
PID: 230969 (RK5N/1p2p3/4k3/1Q6/8/8/8/8 w - - 0 1)

Balashov, Evgeny Fedorovich

Kudesnik, 1994

RK5N/1p2p3/4k3/1Q6/8/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Kxb7?
      • threat
        • 2.Ra6#
      • 1...Kd6
        • 2.Ra6#
      • 1...Kf6!
    • 1.Ra6+?
      • 1...b6
        • 2.Rxb6#
      • 1...bxa6!
  • Keys
    • 1.Ra5!
      • 1...Kd6
        • 2.Qd5#
      • 1...Kf6
        • 2.Qe5#
      • 1...b6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(b)
      • Threat
        • R(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • P(b);P_SPINP(b)::R(B),XP(b)
      • Refutation
        • P(b);XR(B)
  • Actual
    • R(B);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • K(a);P-FLIGHT::QAB1(A)
      • P(b);N_GUARD::QAR2(A)
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