MESON Chess Problem Database

Problem Display
PID: 180522 (2R5/3pK3/p3p1N1/3k4/1R1pq1B1/2p4Q/8/8 w - - 0 1)

Lider, Valentin Viktorovich

Problemas, 1986

2R5/3pK3/p3p1N1/3k4/1R1pq1B1/2p4Q/8/8

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Qxh1#
    • 1...Qg2
      • 2.Qxg2#
    • 1...Qf3
      • 2.Bxf3#
      • 2.Qxf3#
    • 1...c2
      • 2.Qb3#
    • 1...a5
      • 2.Rb5#
  • Tries
    • 1.Bf3?
      • 1...Qxf3
        • 2.Qxf3#
      • 1...d3
        • 2.Bxe4#
      • 1...a5
        • 2.Rb5#
      • 1...e5
        • 2.Qxd7#
      • 1...d6
        • 2.Qxe6#
      • 1...c2!
    • 1.Qh5+?
      • 1...Qf5
        • 2.Bf3#
      • 1...Qe5
        • 2.Bf3#
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Qf3!
      • 1...Qxf3
        • 2.Bxf3#
      • 1...c2
        • 2.Qb3#
      • 1...d3
        • 2.Qxe4#
      • 1...a5
        • 2.Rb5#
      • 1...e5
        • 2.Qf7#
      • 1...d6
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);OGATEB::QAB(A),XQ(c)
    • P(a);OGATE::QAB(A)
    • P(e);N_GUARD::R(B)
  • Tries
    • Try
      • B(C);P_PINQ(c)
      • Vars
        • Q(c);N_SPINQ(c),OGATE,XB(C)::QAB(A),XQ(c)
        • P(b);::B(C),XQ(c)
        • P(e);N_GUARD::R(B)
        • P(f);OGATE::QAR2(A),XP(g)
        • P(g);N_GUARD::QAB1(A),XP(f)
      • Refutation
        • P(a);
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);P_SPINQ(c),S_CUTP(f)::B(C)
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • Q(A);P_PINQ(c)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XQ(A)::B(C),XQ(c)
      • P(a);OGATE::QAB(A)
      • P(b);::QAB1(A),XQ(c)
      • P(e);N_GUARD::R(B)
      • P(f);OGATEB::QAB(A)
      • P(g);N_GUARD::B(C),XP(f)
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).