MESON Chess Problem Database

Problem Display
PID: 229112 (n1N2n2/1R6/B2pp1p1/pPkp1bR1/1r3Q1K/B6p/5P2/2r5 w - - 0 1)

Simkhovich, Froim Markovich

Shakhmaty, 1926

n1N2n2/1R6/B2pp1p1/pPkp1bR1/1r3Q1K/B6p/5P2/2r5

#2

9 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Rc7#
    • 1...Sc7
      • 2.Rxc7#
    • 1...a4
      • 2.Bxb4#
      • 2.Qxb4#
  • Keys
    • 1.Sb6!
      • threat
        • 2.Sa4#
      • 1...Sxb6
        • 2.Rc7#
      • 1...Be4
        • 2.Qe3#
      • 1...Bc2
        • 2.Qc4#
      • 1...a4
        • 2.Sxa4#
        • 2.Bxb4#
        • 2.Qxb4#
      • 1...d4
        • 2.Qxc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(k);N_GUARD::R(H)
    • S(k);N_GUARD::R(H),XS(k)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • S(k);N_GUARD,SBLOCK,XS(I)::R(H)
      • B(g);N_PINQ(C),P_SPINP(f)::QAB(C)
      • B(g);P_SPINP(f),S_CUTR(a)::QAR1(C)
      • P(f);N_PINQ(C),P_SPINB(g),SBLOCK::QAR(C),XR(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).