MESON Chess Problem Database

Problem Display
PID: 173107 (3Bb1Rb/r3rPn1/3p4/3R1Pkp/4ppNN/7P/p3nQP1/K7 w - - 0 1)

Barulin, Mikhail Mikhailovich

Shakhmaty, 1926

3Bb1Rb/r3rPn1/3p4/3R1Pkp/4ppNN/7P/p3nQP1/K7

#2

11 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Bxe7#
    • 1...Ra4
      • 2.Bxe7#
    • 1...Ra5
      • 2.Bxe7#
    • 1...Ra6
      • 2.Bxe7#
    • 1...Ra8
      • 2.Bxe7#
    • 1...Bd7
      • 2.Bxe7#
    • 1...e3
      • 2.Sf3#
  • Keys
    • 1.Sg6!
      • threat
        • 2.Qh4#
      • 1...Sxf5+
        • 2.Sxh8#
      • 1...Se6+
        • 2.f6#
      • 1...h4
        • 2.Qxh4#
      • 1...Sg3
        • 2.Qxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::B(J),XR(i)
    • B(k);S_CUTR(h)::B(J),XR(i)
    • P(c);N_GUARD::S(F)
  • Actual
    • S(F);N_PINS(j)
    • Threat
      • QAB1(B)
    • Vars
      • S(j);CHECK,P_SPINS(j),XP(H)::R(K)+S(F),XB(l)
      • S(j);CHECK,N_GUARD::R(G)+P(H)
      • P(f);::QAB1(B),XP(f)
      • S(b);N_GUARD::QAB1(B),XP(d)
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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).