MESON Chess Problem Database

Problem Display
PID: 162321 (8/K6R/3k4/3B2B1/n1P5/8/3NR1n1/3Q4 w - - 0 1)

Pereira, Alvaro

3rd HM., The Problemist, 2016

8/K6R/3k4/3B2B1/n1P5/8/3NR1n1/3Q4

#2

8 + 3

56 The Problemist 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb3?
      • threat
        • 2.Bxg2#
        • 2.Bf3#
        • 2.Bb7#
        • 2.Ba8#
        • 2.Re6#
      • 1...Se3
        • 2.Bf4#
      • 1...Se1
        • 2.Bf4#
        • 2.Re6#
      • 1...Sf4
        • 2.Bxf4#
      • 1...Sh4
        • 2.Bh1#
        • 2.Bg2#
        • 2.Bf3#
        • 2.Bb7#
        • 2.Ba8#
        • 2.Bf4#
        • 2.Re6#
      • 1...Sb2
        • 2.Re6#
        • 2.c5#
      • 1...Sc3
        • 2.Re6#
        • 2.c5#
      • 1...Sb6
        • 2.Re6#
        • 2.c5#
      • 1...Sc5!
    • 1.Rb7?
      • threat
        • 2.Be7#
      • 1...Kc5
        • 2.Se4#
      • 1...Se3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Se4#
      • 1...Kc5
        • 2.Be7#
      • 1...Sb2
        • 2.Qa3#
      • 1...Sc3
        • 2.Qa3#
      • 1...Sc5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • DUALS(5)
      • Vars
        • S(a);N_GUARD::B(F)
        • S(a);N_GUARD::B(F),XS(a)
      • Refutation
        • S(b);
    • Try
      • R(H);
      • Threat
        • B(F)
      • Vars
        • K(c);S_FLIGHT::S(B)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • S(B)
    • Vars
      • K(c);S_FLIGHT::B(F)
      • S(b);N_GUARD::QAB(A)
      • S(b);SBLOCK::QAB1(A)
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