MESON Chess Problem Database

Problem Display
PID: 139953 (3r4/2N1QP2/8/2p1Pp2/2pk1r2/2n3N1/p1P5/K1B5 w - - 0 1)

Sobolevsky, Petr

Shakhmaty v SSSR, 1949

3r4/2N1QP2/8/2p1Pp2/2pk1r2/2n3N1/p1P5/K1B5

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Sxf5#
    • 1...Se4
      • 2.Se2#
    • 1...Sd5
      • 2.Sb5#
  • Tries
    • 1.Qd6+?
      • 1...Sd5
        • 2.Sb5#
      • 1...Rxd6!
  • Keys
    • 1.Qf6!
      • threat
        • 2.e6#
      • 1...Se4
        • 2.Se2#
      • 1...Sd5
        • 2.Sb5#
      • 1...Re4
        • 2.Sxf5#
      • 1...Rd5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD,SBLOCK::S(D),XP(g)
    • S(b);N_GUARD,SBLOCK::S(D)
    • S(b);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • S(b);P_SPINS(b)::S(F)
      • Refutation
        • R(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+P(E)
    • Vars
      • S(b);N_GUARD,SBLOCK::S(D)
      • S(b);N_GUARD,SBLOCK::S(F)
      • R(e);N_GUARD,SBLOCK::S(D),XP(g)
      • R(h);SBLOCK::S(F)
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