MESON Chess Problem Database

Problem Display
PID: 51544 (4n1rb/2pRpPkB/2K2R2/8/8/8/8/2B5 w - - 0 1)

Tolstoy, Stanislav Maksimovic

The Guardian, 1963

4n1rb/2pRpPkB/2K2R2/8/8/8/8/2B5

#2

6 + 6

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.fxg8Q#
      • 2.fxg8R#
    • 1...exf6
      • 2.fxe8Q#
      • 2.fxe8R#
      • 2.fxg8Q#
      • 2.fxg8R#
    • 1...e5
      • 2.fxe8S#
      • 2.fxg8S#
      • 2.f8Q#
      • 2.f8R#
    • 1...e6
      • 2.fxe8S#
      • 2.fxg8S#
      • 2.f8Q#
      • 2.f8R#
  • Tries
    • 1.Rg6+?
      • 1...Kxh7
        • 2.fxg8Q#
      • 1...Kf8
        • 2.fxg8Q#
      • 1...Kxf7!
    • 1.fxe8S+?
      • 1...Kxh7
        • 2.Rh6#
      • 1...Rxe8!
    • 1.f8Q+?
      • 1...Kxh7
        • 2.Rh6#
        • 2.Qh6#
      • 1...Rxf8!
  • Keys
    • 1.Rxe7!
      • threat
        • 2.fxe8S#
        • 2.fxg8S#
        • 2.f8Q#
        • 2.f8R#
      • 1...Kxf6
        • 2.fxg8S#
      • 1...Kxh7
        • 2.f8S#
      • 1...Kf8
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Sxf6
        • 2.fxg8Q#
        • 2.fxg8R#
      • 1...Rf8
        • 2.fxe8S#
      • 1...Sd6
        • 2.f8Q#

Anticipated by 22009(1923), 26657(1923)

This anticipates 3195(1972)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::PXR(e)=Q
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT,XB(F)::PXR(e)=Q
        • K(c);S_FLIGHT::PXR(e)=Q
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b),XP(E)
    • Try
      • P(E);CHECK,P_PINP(b),XS(d)
      • Vars
        • K(c);P-FLIGHT,XB(F)::R1(C)
      • Refutation
        • R(e);XS(E)
    • Try
      • P(E);CHECK,P_PINP(b)
      • Refutation
        • R(e);XQ(E)
  • Actual
    • R(D);XP(b)
    • Threat
      • DUALS(4)
    • Vars
      • K(c);S_FLIGHT,XR(C)::PXR(e)=S
      • K(c);P-FLIGHT,XB(F)::P=S
      • K(c);S_FLIGHT::PXS(d)=Q
      • S(d);SBLOCK,XR(C)::PXR(e)=Q
      • R(e);::PXS(d)=S
      • S(d);::P=Q
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