MESON Chess Problem Database

Problem Display
PID: 169066 (B5Q1/K7/b7/8/8/8/5NNk/5nn1 w - - 0 1)

Permyakov, Evgeni Nikolaevich

SuperProblem 004. TT, 2012

B5Q1/K7/b7/8/8/8/5NNk/5nn1

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Qb8#
    • 1...Se3
      • 2.Qb8#
  • Tries
    • 1.Qh7+?
      • 1...Kg3
        • 2.Qh4#
      • 1...Sh3!
    • 1.Qh8+?
      • 1...Kg3
        • 2.Qh4#
      • 1...Sh3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Qg2#
      • 1...Sxe3
        • 2.Qb8#
      • 1...Bb7
        • 2.Sxf1#
      • 1...Sg3
        • 2.Seg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(E)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(B);
    • Threat
      • QAR1(E)
    • Vars
      • S(a);N_GUARD,XS(B)::QAB(E)
      • B(d);N_GUARD::S(B),XS(a)
      • S(a);SBLOCK::S(B)
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