MESON Chess Problem Database

Problem Display
PID: 7026 (1Nnkbq2/Pp1P1P2/1bn2R2/2R2BN1/K1p4B/p3r3/8/4r3 w - - 0 1)

Loshinski, Lev Ilich

1/2 Prize, Shakhmaty v SSSR, 1935

1Nnkbq2/Pp1P1P2/1bn2R2/2R2BN1/K1p4B/p3r3/8/4r3

#2

10 + 11

3098 FIDE Album (1914-1944) (I) 1971
5314 Grossmeister Shakhmatnoi Kompozitsii 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Kc7
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Qe7
      • 2.dxc8Q#
      • 2.dxc8R#
    • 1...Re7
      • 2.dxc8Q#
      • 2.dxc8R#
  • Tries
    • 1.Se6+?
      • 1...Ke7
        • 2.dxc8S#
      • 1...Rxe6!
    • 1.Sxc6+?
      • 1...Kc7
        • 2.a8S#
        • 2.dxc8Q#
        • 2.dxc8R#
        • 2.d8Q#
        • 2.d8B#
      • 1...bxc6!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Se6#
      • 1...Kc7
        • 2.d8Q#
      • 1...Ke7
        • 2.dxc8S#
      • 1...Qe7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Re6
        • 2.Sxe6#
      • 1...Re7
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...S6e7
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...S8e7
        • 2.dxe8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(i);P_SPINS(f),S_FLIGHT::PXS(h)=Q
    • Q(k);SBLOCK::PXS(h)=Q
    • R(c);SBLOCK::PXS(h)=Q
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(i);S_FLIGHT::PXS(h)=S
      • Refutation
        • R(c);XS(E)
    • Try
      • S(J);CHECK,XS(f)
      • Refutation
        • P(g);XS(J)
  • Actual
    • R(F);
    • Threat
      • B(B)+S(E),DCHECK
    • Vars
      • K(i);OGATE,P_SPINS(f),S_FLIGHT::P=Q
      • K(i);S_FLIGHT::PXS(h)=S
      • Q(k);SBLOCK::PXS(h)=Q
      • R(c);::B(B)+S(E),DCHECK,XR(c)
      • R(c);SBLOCK::PXS(h)=Q
      • S(f);P_PINP(H)::PXB(j)=Q
      • S(h);SBLOCK::PXB(j)=S
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