MESON Chess Problem Database

Problem Display
PID: 109990 (4r3/1pR1Nrn1/2p2N1q/2B3PP/PPk1p1BQ/2P4R/K3P3/8 w - - 0 1)

Haring, Jacobus

Leningrad Smena, 1964

4r3/1pR1Nrn1/2p2N1q/2B3PP/PPk1p1BQ/2P4R/K3P3/8

#2

14 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxh5
      • 2.Be6#
    • 1...Se6
      • 2.Bxe6#
  • Tries
    • 1.Sfd5?
      • threat
        • 2.Sb6#
      • 1...cxd5
        • 2.Bd6#
      • 1...e3
        • 2.Bf5#
      • 1...b6
        • 2.Sxb6#
      • 1...Rf3!
  • Keys
    • 1.Sed5!
      • threat
        • 2.Sb6#
      • 1...cxd5
        • 2.Be7#
      • 1...e3
        • 2.Be6#
      • 1...b6
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD,XP(K)::B(G)
    • S(g);N_GUARD::B(G),XS(g)
  • Tries
    • Try
      • S(L);
      • Threat
        • S(L)
      • Vars
        • P(c);OGATEB,XS(L)::R(M)+B(I)
        • P(b);OGATEB::QAR(H)+B(G)
        • P(e);::S(L),XP(e)
      • Refutation
        • R(f);
  • Actual
    • S(N);
    • Threat
      • S(N)
    • Vars
      • P(c);OGATEB,XS(N)::R(M)+B(I)
      • P(b);OGATEB::QAR(H)+B(G)
      • P(e);::S(N),XP(e)
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