MESON Chess Problem Database

Problem Display
PID: 172430 (4n2k/7b/6pK/8/5N2/7Q/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

4n2k/7b/6pK/8/5N2/7Q/8/8

#2

3 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Sxg6#
  • Tries
    • 1.Sxg6+?
      • 1...Kg8
        • 2.Qe6#
        • 2.Qb3#
      • 1...Bxg6!
    • 1.Qc8?
      • 1...Kg8
        • 2.Qxe8#
      • 1...Bg8
        • 2.Sxg6#
      • 1...g5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxh7#
      • 1...Kg8
        • 2.Qxe8#
      • 1...Bg8
        • 2.Sxg6#
      • 1...Sf6
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD,SBLOCK::S(B),XP(a)
  • Tries
    • Try
      • S(B);CHECK,XP(a)
      • Refutation
        • B(b);XS(B)
    • Try
      • Q(A);P_PINS(c)
      • Vars
        • K(d);P-FLIGHT::QAR2(A),XS(c)
        • B(b);N_GUARD,N_SPINS(c),SBLOCK::S(B),XP(a)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XB(b)
    • Vars
      • K(d);P-FLIGHT::QAR2(A),XS(c)
      • B(b);N_GUARD,SBLOCK::S(B),XP(a)
      • S(c);N_GUARD::QAB1(A)
      • S(c);N_GUARD::QAB1(A),XS(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).