MESON Chess Problem Database

Problem Display
PID: 52253 (n2Q4/4n3/4pPbN/3Nkp2/4P2K/4P3/3P1P2/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

2nd HM., DSV Ty., 1985

n2Q4/4n3/4pPbN/3Nkp2/4P2K/4P3/3P1P2/8

#2

9 + 6

102 Probleemblad 2004

SOLUTION

  • SOUND
  • Sets
    • 1...exd5
      • 2.Qxe7#
  • Tries
    • 1.d3?
      • threat
        • 2.f4#
      • 1...fxe4
        • 2.d4#
      • 1...exd5
        • 2.Qxe7#
      • 1...f4
        • 2.Sg4#
      • 1...Sxd5!
    • 1.f3?
      • threat
        • 2.d4#
      • 1...fxe4
        • 2.f4#
      • 1...exd5
        • 2.Qxe7#
      • 1...Sc6!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qd4#
      • 1...Kxf6
        • 2.Qh8#
      • 1...Sd5
        • 2.d4#
      • 1...Sc6
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATEB,XS(F)::QAR2(I),XS(e)
  • Tries
    • Try
      • P(A);
      • Threat
        • P(B)
      • Vars
        • P(b);SBLOCK,XP(D)::P(A)
        • P(c);OGATEB,XS(F)::QAR2(I),XS(e)
        • P(b);N_GUARD::S(H)
      • Refutation
        • S(e);XS(F)
    • Try
      • P(B);
      • Threat
        • P(A)
      • Vars
        • P(b);SBLOCK,XP(D)::P(B)
        • P(c);OGATEB,XS(F)::QAR2(I),XS(e)
      • Refutation
        • S(e);
  • Actual
    • S(F);
    • Threat
      • QAB1(I)
    • Vars
      • K(a);OGATEB,P_SPINS(e),S_FLIGHT,XP(G)::QAB(I)
      • S(e);::P(A)
      • S(e);::P(B)
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