MESON Chess Problem Database

Problem Display
PID: 176611 (2B2b1N/7p/3p1k1p/8/3p3p/5n2/1K3B2/Q3R1R1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Schach-Echo, 1979

2B2b1N/7p/3p1k1p/8/3p3p/5n2/1K3B2/Q3R1R1

#2

7 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bxd4#
      • 2.Bxh4#
    • 1...Sh2
      • 2.Bxd4#
      • 2.Bxh4#
    • 1...Se5
      • 2.Bxh4#
    • 1...Sg5
      • 2.Bxd4#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...Sxg1
        • 2.Bxd4#
      • 1...Se5
        • 2.Bxh4#
      • 1...Sg5
        • 2.Bxd4#
      • 1...Sd2
        • 2.Bxd4#
        • 2.Bxh4#
      • 1...Sxe1!
    • 1.Qa5?
      • threat
        • 2.Re6#
        • 2.Qf5#
      • 1...Sxe1
        • 2.Bxh4#
      • 1...Sxg1
        • 2.Bxd4#
      • 1...Se5
        • 2.Bxh4#
      • 1...Sg5
        • 2.Bxd4#
      • 1...d5!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Qf7#
      • 1...Sxe1
        • 2.Bxd4#
      • 1...Sxg1
        • 2.Bxh4#
      • 1...Be7
        • 2.Qxe7#
      • 1...Se5
        • 2.Bxh4#
      • 1...Sg5
        • 2.Bxd4#
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::B(E),XP(c)
    • S(a);N_GUARD::B(E),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • S(a);N_GUARD,XR(C)::B(E),XP(b)
        • S(a);N_GUARD::B(E),XP(c)
        • S(a);N_GUARD::B(E),XP(b)
      • Refutation
        • S(a);XR(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);N_GUARD,XR(B)::B(E),XP(c)
        • S(a);N_GUARD,XR(C)::B(E),XP(b)
        • S(a);N_GUARD::B(E),XP(c)
        • S(a);N_GUARD::B(E),XP(b)
      • Refutation
        • P(d);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);N_GUARD,XR(B)::B(E),XP(b)
      • S(a);N_GUARD,XR(C)::B(E),XP(c)
      • B(h);N_GUARD::QAB1(A),XB(h)
      • S(a);N_GUARD::B(E),XP(c)
HTML5 logo

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).