MESON Chess Problem Database

Problem Display
PID: 231256 (4r1b1/2Rp4/N2k1Pp1/p2pn1R1/1r3Q1K/B1pp1p1B/n4N2/8 w - - 0 1)

Neunivako, Pavel Efimovich

1/2 Prize, 64 Shakhmatnoe obozrenie, 1927

4r1b1/2Rp4/N2k1Pp1/p2pn1R1/1r3Q1K/B1pp1p1B/n4N2/8

#2

9 + 13

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Keys
    • 1.Qd4!
      • threat
        • 2.Se4#
      • 1...Sg4
        • 2.Qb6#
      • 1...Sc4
        • 2.Qc5#
      • 1...Sc6
        • 2.Rxd7#
      • 1...Sf7
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(D);N_PINS(h),P_PINP(g)
    • Threat
      • S(A)
    • Vars
      • S(h);N_PINQ(D)::QAR2(D)
      • S(h);N_PINQ(D)::QAB1(D)
      • S(h);N_GUARD,SBLOCK::R1(I),XP(k)
      • S(h);OGATE::R1(F),XP(g)
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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).