MESON Chess Problem Database

Problem Display
PID: 147962 (3q1bK1/4p1p1/B3R3/2N5/2n1Q2B/r2rN2p/b1RPk2n/8 w - - 0 1)

Barulin, Mikhail Mikhailovich

L'Italia Scacchistica, 1930

3q1bK1/4p1p1/B3R3/2N5/2n1Q2B/r2rN2p/b1RPk2n/8

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.d4#
    • 1...Rd5
      • 2.d4#
    • 1...Rd6
      • 2.d4#
    • 1...Rd7
      • 2.d4#
    • 1...Sf1
      • 2.Qg4#
    • 1...Sg4
      • 2.Qxg4#
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qd1#
      • 1...Rxe3
        • 2.d4#
      • 1...Sxe3
        • 2.dxe3#
      • 1...Sf1
        • 2.Qxf1#
      • 1...Sb2
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(e);OGATE,P_SPINS(g)::R(A)+P(B)
    • S(c);N_GUARD::QAB(D)
    • S(c);N_GUARD::QAB(D),XS(c)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • R(e);OGATE,P_SPINR(e),P_SPINS(g),XS(C)::R(A)+P(B)
      • S(g);OGATE,P_PINR(H),P_SPINR(e),P_SPINS(g),XS(C)::R(A)+P(B),XS(g)
      • S(c);N_GUARD::QAB1(D),XS(c)
      • S(g);N_GUARD,P_PINR(H),P_SPINR(e)::R(H)+S(C)
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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).