MESON Chess Problem Database

Problem Display
PID: 152058 (2QK4/r2P2nB/2P1kN1R/2P1N2p/3p4/3P4/3B4/4R3 w - - 0 1)

Dolginovich, Nikolai Osipovich

2nd HM., UV CSTV, 1983

2QK4/r2P2nB/2P1kN1R/2P1N2p/3p4/3P4/3B4/4R3

#2

12 + 5

3485 Sachova skladba 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7+
      • 2.Qxd7#
    • 1...Sf5
      • 2.Bg8#
    • 1...Se8
      • 2.dxe8Q#
      • 2.dxe8R#
  • Tries
    • 1.Sg6+?
      • 1...Kf5
        • 2.Sh4#
        • 2.Se7#
        • 2.Sf8#
        • 2.Sh8#
      • 1...Kxf6
        • 2.Se5#
        • 2.Sh8#
      • 1...Kf7!
    • 1.Se4+?
      • 1...Kxe5
        • 2.Sc3#
        • 2.Sf6#
      • 1...Kd5!
    • 1.Bg6?
      • threat
        • 2.Seg4#
      • 1...Rxd7+
        • 2.Sexd7#
      • 1...Kxf6
        • 2.Bh7#
      • 1...Sf5
        • 2.Bf7#
      • 1...Ra1!
  • Keys
    • 1.Be4!
      • threat
        • 2.Sfg4#
      • 1...Rxd7+
        • 2.Sfxd7#
      • 1...Kxe5
        • 2.Bh7#
      • 1...Sf5
        • 2.Bd5#
      • 1...Se8
        • 2.dxe8Q#
        • 2.dxe8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(d);CHECK,OGATE,P_SPINR(d),XP(I)::QAB1(K),XR(d)
    • S(e);SBLOCK::B(J)
    • S(e);OGATE::PXS(e)=Q
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(J);
      • Threat
        • R(A)+S(E)
      • Vars
        • R(d);CHECK,P_SPINR(d),XP(I)::R(A)+S(E),XR(d)
        • K(c);OGATEB,P-FLIGHT,XS(G)::R(H)+B(J)
        • S(e);SBLOCK::B(J)
      • Refutation
        • R(d);
  • Actual
    • B(J);
    • Threat
      • R(H)+S(G)
    • Vars
      • R(d);CHECK,P_SPINR(d),XP(I)::R(H)+S(G),XR(d)
      • K(c);OGATEB,P-FLIGHT,XS(E)::R(A)+B(J)
      • S(e);SBLOCK::B(J)
      • S(e);OGATE::PXS(e)=Q
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