MESON Chess Problem Database

Problem Display
PID: 225444 (8/8/7B/Q7/NR1P2K1/2ppp3/n1k5/7R w - - 0 1)

Dimitrov, Nikolai

Praca, 1958

8/8/7B/Q7/NR1P2K1/2ppp3/n1k5/7R

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd2
      • 2.Rb2#
    • 1...d2
      • 2.Qf5#
  • Tries
    • 1.Bxe3?
      • 1...d2
        • 2.Qf5#
      • 1...Sc1
        • 2.Rxc1#
      • 1...Sxb4!
    • 1.Qc5?
      • threat
        • 2.Rb2#
      • 1...Sxb4
        • 2.Qxc3#
      • 1...d2
        • 2.Qf5#
      • 1...Kd2!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Rb2#
      • 1...Kd2
        • 2.Qh2#
      • 1...Sxb4
        • 2.Qxc3#
      • 1...d2
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINP(e)::R(C)
    • P(d);OGATEB,SBLOCK::QAB(F)
  • Tries
    • Try
      • B(G);XP(e)
      • Vars
        • P(d);OGATEB::QAB(F)
        • S(a);N_GUARD::R1(A),XS(a)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(F);P_PINP(c)
      • Threat
        • R1(C)
      • Vars
        • S(a);N_GUARD,XR(C)::QAR1(F),XP(c)
        • P(d);OGATEB,SBLOCK::QAB(F)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(e)
  • Actual
    • Q(F);P_PINP(c)
    • Threat
      • R1(C)
    • Vars
      • K(b);N_SPINP(c),P-FLIGHT,P_SPINP(e)::QAR(F)
      • S(a);N_GUARD,XR(C)::QAR1(F),XP(c)
      • P(d);OGATEB,SBLOCK::QAB(F)
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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).