MESON Chess Problem Database

Problem Display
PID: 56864 (4Q1N1/1r5p/2bppp2/1p1k1pb1/1R1P2p1/3K4/4P3/8 w - - 0 1)

Balashov, Evgeny Fedorovich

Troll, 1994

4Q1N1/1r5p/2bppp2/1p1k1pb1/1R1P2p1/3K4/4P3/8

#2

6 + 11

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Se7#
    • 1...Re7
      • 2.Sxe7#
    • 1...Rb8
      • 2.Se7#
    • 1...Bc1
      • 2.Sxf6#
    • 1...Bd2
      • 2.Sxf6#
    • 1...Be3
      • 2.Sxf6#
    • 1...Bf4
      • 2.Sxf6#
    • 1...Bh6
      • 2.Sxf6#
    • 1...Bd7
      • 2.Se7#
  • Tries
    • 1.Rxb5+?
      • 1...Rxb5
        • 2.Se7#
      • 1...Bxb5+!
    • 1.Qh5?
      • threat
        • 2.Qh1#
      • 1...Bh4
        • 2.e4#
      • 1...g3
        • 2.Qf3#
      • 1...f4
        • 2.Sxf6#
      • 1...e5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa2#
      • 1...Bd7
        • 2.Se7#
      • 1...Be8
        • 2.Se7#
      • 1...Ra7
        • 2.Rxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • R(j);N_GUARD::S(F)
    • R(j);N_GUARD::S(F),XR(j)
    • B(e);N_GUARD::S(F),XP(i)
    • B(f);S_CUTR(j)::S(F)
  • Tries
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • R(j);XR(C)::S(F)
      • Refutation
        • B(f);CHECK,XR(C)
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • B(e);P_SPINP(d)::P(A)
        • P(a);OGATE::QAB(E)
        • P(d);P_SPINB(e)::S(F),XP(i)
      • Refutation
        • P(h);
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • B(f);P_SPINR(j)::S(F)
      • R(j);N_GUARD,P_SPINB(f)::R(C),XP(b)
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