MESON Chess Problem Database

Problem Display
PID: 204490 (8/8/pb6/qp6/1k1P4/2N5/2P5/2BQKB1b w - - 0 1)

Novikov, L

64 Shakhmatnoe obozrenie, 1925

8/8/pb6/qp6/1k1P4/2N5/2P5/2BQKB1b

#2

7 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc3
      • 2.Qd2#
    • 1...Bxd4
      • 2.Qxd4#
  • Tries
    • 1.Sa2+?
      • 1...Ka4+
        • 2.c3#
      • 1...Qxa2!
    • 1.Sd5+?
      • 1...Ka4+
        • 2.c3#
      • 1...Bxd5!
  • Keys
    • 1.Sa4!
      • threat
        • 2.c3#
      • 1...Kxa4+
        • 2.c3#
      • 1...Qxa4
        • 2.Qd2#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...bxa4
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(B)
    • B(f);OGATE,XP(G)::QAR2(B),XB(f)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);CHECK,P-FLIGHT::QAB(B)+P(E)
      • Refutation
        • Q(c);XS(F)
    • Try
      • S(F);CHECK
      • Vars
        • K(b);CHECK,P-FLIGHT::QAB(B)+P(E)
      • Refutation
        • B(a);XS(F)
  • Actual
    • S(F);
    • Threat
      • P(E)
    • Vars
      • K(b);CHECK,P-FLIGHT,XS(F)::QAB(B)+P(E)
      • Q(c);SBLOCK,XS(F)::QAB(B)
      • B(f);OGATE,XP(G)::QAR2(B),XB(f)
      • P(d);SBLOCK,XS(F)::QAB(B)
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).