MESON Chess Problem Database

Problem Display
PID: 129832 (4b3/3B3p/4Q3/pn6/kq5R/p7/8/K7 w - - 0 1)

Svozilek, Dalibor

Ruch, 1947

4b3/3B3p/4Q3/pn6/kq5R/p7/8/K7

#2

4 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qd4+
      • 2.Rxd4#
    • 1...Qe4
      • 2.Rxe4#
    • 1...Qf4
      • 2.Rxf4#
    • 1...Qg4
      • 2.Rxg4#
    • 1...a2
      • 2.Qxa2#
  • Tries
    • 1.Ka2?
      • threat
        • 2.Qb3#
      • 1...Qc4+
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Bf7!
    • 1.Qc4?
      • threat
        • 2.Qc2#
      • 1...a2
        • 2.Qxa2#
      • 1...Bg6
        • 2.Bxb5#
      • 1...Bf7
        • 2.Bxb5#
      • 1...Qxc4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qd1#
      • 1...Qd4+
        • 2.Rxd4#
      • 1...Qxh4
        • 2.Qxb5#
      • 1...Qc4
        • 2.Qxc4#
        • 2.Qxb5#
      • 1...Qe4
        • 2.Rxe4#
        • 2.Qxb5#
      • 1...Qf4
        • 2.Rxf4#
        • 2.Qxb5#
      • 1...Qg4
        • 2.Rxg4#
        • 2.Qxb5#
      • 1...a2
        • 2.Qxa2#
      • 1...Bh5
        • 2.Bxb5#
      • 1...Bg6
        • 2.Bxb5#
      • 1...Bf7
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATEB::QAR2(C),XQ(c)
    • Q(c);CHECK,OGATEB::R(B),XQ(c)
    • Q(c);OGATEB::R(B),XQ(c)
    • P(a);OGATEB::QAR2(C),XP(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAB1(C)
      • Refutation
        • B(g);P_PINQ(C)
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • P(a);OGATEB::QAR2(C),XP(a)
        • B(g);N_GUARD::B(D),XS(e)
      • Refutation
        • Q(c);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(c);CHECK,OGATEB::R(B),XQ(c)
      • Q(c);N_SPINQ(c),SBLOCK,XR(B)::QAB1(C),XS(e)
      • P(a);OGATEB::QAR2(C),XP(a)
      • B(g);N_GUARD::B(D),XS(e)
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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).