MESON Chess Problem Database

Problem Display
PID: 241105 (3RK2b/NR2N3/8/p3p3/rPkPp3/1pnp4/4r3/2Q5 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Shakhmaty (Riga), 1975

3RK2b/NR2N3/8/p3p3/rPkPp3/1pnp4/4r3/2Q5

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Rc7#
    • 1...axb4
      • 2.Rc7#
    • 1...exd4
      • 2.Rc8#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qxc3#
      • 1...Kxb4
        • 2.Qxc3#
      • 1...axb4
        • 2.Rc8#
      • 1...exd4
        • 2.Sd6#
      • 1...Rc2!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Qxc3#
      • 1...Kxd4
        • 2.Qxc3#
      • 1...axb4
        • 2.Sb6#
      • 1...exd4
        • 2.Rc7#
      • 1...Rc2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(e);SBLOCK,XP(B)::R(E)
    • P(h);SBLOCK,XP(B)::R(E)
    • P(i);SBLOCK,XP(C)::R(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(A),XS(c)
      • Vars
        • K(f);N_SPINS(c),P-FLIGHT,XP(B)::QAB1(A),XS(c)
        • P(h);SBLOCK,XP(B)::R(G)
        • P(i);SBLOCK,XP(C)::S(D)
      • Refutation
        • R(a);N_SPINS(c)
  • Actual
    • S(F);
    • Threat
      • QAR1(A),XS(c)
    • Vars
      • K(f);N_SPINS(c),P-FLIGHT,XP(C)::QAB1(A),XS(c)
      • P(h);SBLOCK,XP(B)::S(F)
      • P(i);SBLOCK,XP(C)::R(E)
      • R(a);N_GUARD,N_SPINS(c)::S(F)
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