MESON Chess Problem Database

Problem Display
PID: 197853 (8/8/5p2/1R1Nk3/R7/7K/8/1Q6 w - - 0 1)

Zykov, VI

Sachova skladba, 1986

8/8/5p2/1R1Nk3/R7/7K/8/1Q6

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Re4+?
      • 1...Kf5
        • 2.Sf4#
        • 2.Se7#
      • 1...Kd6!
    • 1.Rb6?
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qf5#
        • 2.Qb5#
      • 1...f5!
    • 1.Qe1+?
      • 1...Kf5
        • 2.Sf4#
        • 2.Se7#
      • 1...Kd6!
    • 1.Qb4?
      • threat
        • 2.Sf4#
        • 2.Sc7#
      • 1...Kf5
        • 2.Sf4#
      • 1...f5
        • 2.Qe7#
      • 1...Ke6!
  • Keys
    • 1.Qf5+!
      • 1...Kxf5
        • 2.Sf4#
      • 1...Kd6
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(D);
      • Threat
        • QAR1(A)
      • Refutation
        • P(b);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::R(D)+S(E)
        • P(b);SBLOCK::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);P-FLIGHT,XQ(A)::R(D)+S(E)
      • K(a);S_FLIGHT::R(C)
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