MESON Chess Problem Database

Problem Display
PID: 110693 (8/8/8/1p2N3/1p4B1/1p6/nK1kpP2/7Q w - - 0 1)

Lazdinits, Eriks

19th Place, Latvian Championship, 1959

8/8/8/1p2N3/1p4B1/1p6/nK1kpP2/7Q

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qxc1#
    • 1...Sc3
      • 2.Qc1#
    • 1...e1Q
      • 2.Qd5#
    • 1...e1S
      • 2.Qh6#
    • 1...e1B
      • 2.Qd5#
      • 2.Qh6#
    • 1...e1R
      • 2.Qd5#
  • Tries
    • 1.Sc4+?
      • 1...Kd3
        • 2.Qd5#
      • 1...bxc4!
    • 1.Bh5?
      • 1...e1Q
        • 2.Qd5#
      • 1...e1B
        • 2.Qd5#
      • 1...e1R
        • 2.Qd5#
      • 1...Sc1
        • 2.Qxc1#
      • 1...Sc3
        • 2.Qc1#
      • 1...e1S!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Sf3#
      • 1...Sc1
        • 2.Qxc1#
      • 1...e1Q
        • 2.Qd3#
      • 1...e1S
        • 2.Qd1#
      • 1...e1B
        • 2.Qd3#
        • 2.Qd1#
      • 1...e1R
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(A),XS(a)
    • S(a);N_GUARD::QAB1(A)
    • P(c);SBLOCK::QAR(A)
    • P(c);SBLOCK::QAB(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(f);XS(E)
    • Try
      • B(D);
      • Vars
        • P(c);SBLOCK::QAR(A)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • S(E)
    • Vars
      • S(a);N_GUARD::QAB1(A),XS(a)
      • P(c);SBLOCK::QAR1(A)
      • P(c);N_GUARD::QAR1(A)
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).