MESON Chess Problem Database

Problem Display
PID: 37905 (1B6/2N5/1K2p2Q/1P1p1R2/2pkr3/R1N3p1/2Pp1pPp/3B1n1n w - - 0 1)

Erokhin, Vladimir Alekseevich

Shakhmatny Vestnik, 1992

1B6/2N5/1K2p2Q/1P1p1R2/2pkr3/R1N3p1/2Pp1pPp/3B1n1n

#2

11 + 11

3705 Album Russia (1992-1994) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Qxf4#
    • 1...Rg4
      • 2.Sxe6#
    • 1...Rh4
      • 2.Sxe6#
    • 1...Se3
      • 2.Se2#
    • 1...e5
      • 2.Se6#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Se2#
        • 2.Sxe6#
      • 1...exf5
        • 2.Se2#
        • 2.Se6#
      • 1...e5
        • 2.Se2#
        • 2.Se6#
      • 1...Rxf4!
    • 1.Qg7+?
      • 1...Ke3
        • 2.S3xd5#
        • 2.Rf3#
      • 1...Re5
        • 2.Qxe5#
      • 1...e5!
    • 1.Qf6+?
      • 1...Ke3
        • 2.S3xd5#
        • 2.Rf3#
      • 1...Re5
        • 2.Qxe5#
      • 1...e5!
    • 1.Qh8+?
      • 1...Ke3
        • 2.S3xd5#
        • 2.Rf3#
      • 1...Re5
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Rf4!
      • 1...Ke3
        • 2.Rxe4#
      • 1...Ke5
        • 2.Sxe6#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Se3
        • 2.Sxe6#
      • 1...e5
        • 2.Se2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(i);OGATEB::QAR2(I),XR(i)
    • R(i);N_GUARD::S(J),XP(k)
    • S(a);S_CUTR(i)::S(E)
    • P(k);S_CUTR(i)::S(J)
  • Tries
    • Try
      • Q(I);P_PINR(i)
      • Threat
        • DUALS(2)
      • Refutation
        • R(i);N_SPINR(i),XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(I),XR(i)
      • Refutation
        • P(k);P_SPINP(k)
    • Try
      • Q(I);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(I),XR(i)
      • Refutation
        • P(k);P_SPINP(k)
    • Try
      • Q(I);CHECK
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::QAB1(I),XR(i)
      • Refutation
        • P(k);P_SPINP(k)
  • Actual
    • R(G);P_PINR(i)
    • Vars
      • K(h);N_SPINR(i),S_FLIGHT::QAB(I)+R(G),DCHECK,XR(i)
      • K(h);N_SPINR(i),S_FLIGHT::B(K)+S(J),XP(k)
      • R(i);N_SPINR(i),OGATE,XR(G)::QAR2(I),XR(i)
      • S(a);SBLOCK::S(J),XP(k)
      • P(k);SBLOCK::S(E)
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