MESON Chess Problem Database

Problem Display
PID: 172459 (6R1/4nP1k/8/5P1K/5B2/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1997

6R1/4nP1k/8/5P1K/5B2/8/8/8

#2

5 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.fxg6#
  • Tries
    • 1.Rh8+?
      • 1...Kg7
        • 2.f8Q#
      • 1...Kxh8!
    • 1.f8Q?
      • threat
        • 2.Rg7#
        • 2.Rh8#
        • 2.Qg7#
        • 2.Qf7#
      • 1...Sxf5
        • 2.Rh8#
      • 1...Sg6
        • 2.Rg7#
        • 2.Qg7#
        • 2.Qf7#
        • 2.fxg6#
      • 1...Sxg8!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rh8#
      • 1...Sxg8
        • 2.f8S#
      • 1...Sg6
        • 2.fxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(B),XS(a)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);P-FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT,XR(E)
    • Try
      • P(D);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);XP(B)::R1(E)
      • Refutation
        • S(a);XR(E)
  • Actual
    • B(A);
    • Threat
      • R1(E)
    • Vars
      • S(a);SBLOCK,XR(E)::P=S
      • S(a);OGATE::P(B),XS(a)
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