MESON Chess Problem Database

Problem Display
PID: 136528 (3K4/p2N1Nn1/p1P1b2R/3k4/P1p5/8/5B2/1Qn5 w - - 0 1)

Dolgachev, A

Comm., Die Schwalbe, 1979

3K4/p2N1Nn1/p1P1b2R/3k4/P1p5/8/5B2/1Qn5

#2

8 + 7

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qe4#
    • 1...Bh3
      • 2.Rd6#
    • 1...Bg4
      • 2.Rd6#
    • 1...Bf5
      • 2.Rd6#
    • 1...Bxd7
      • 2.Rd6#
    • 1...Sa2
      • 2.Qh1#
    • 1...Se2
      • 2.Qh1#
    • 1...Sb3
      • 2.Qh1#
    • 1...Sd3
      • 2.Qh1#
  • Tries
    • 1.Sb6+?
      • 1...Kxc6
        • 2.Qe4#
      • 1...axb6!
    • 1.c7?
      • threat
        • 2.Qb7#
      • 1...Kc6
        • 2.Qe4#
      • 1...Bxd7
        • 2.Rd6#
      • 1...Sb3
        • 2.Qh1#
      • 1...c3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qe4#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Bf5
        • 2.Rd6#
      • 1...Sd3
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • K(c);P_SPINB(e),S_FLIGHT,XP(D)::QAB(A)
    • B(e);OGATE::R1(E)
    • B(e);OGATE,XS(F)::R1(E)
    • S(a);OGATE::QAB(A)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P_SPINB(e),S_FLIGHT,XP(D)::QAB(A)
      • Refutation
        • P(f);XS(F)
    • Try
      • P(D);
      • Threat
        • QAB(A)
      • Vars
        • K(c);P_SPINB(e),S_FLIGHT::QAB(A)
        • B(e);OGATE,XS(F)::R1(E)
        • S(a);OGATE::QAB(A)
      • Refutation
        • P(b);
  • Actual
    • S(F);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);OGATEB,P_SPINB(e),S_FLIGHT,XP(D)::QAB1(A)
      • B(e);OGATE::R1(E)
      • S(a);OGATE::QAB(A)
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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).