MESON Chess Problem Database

Problem Display
PID: 96536 (4NqB1/2b4r/b1pnrp2/R1nk4/2p2p2/3P1N1p/4P2K/2Q5 w - - 0 1)

Mangalis, Laimons

Problem (Zagreb), 1952

4NqB1/2b4r/b1pnrp2/R1nk4/2p2p2/3P1N1p/4P2K/2Q5

#2

8 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Sxc7#
    • 1...Rh5
      • 2.Sxc7#
    • 1...Rh6
      • 2.Sxc7#
    • 1...Rh8
      • 2.Sxc7#
    • 1...Sb5
      • 2.Qxc4#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qd4#
      • 1...Sb5
        • 2.Qxc4#
      • 1...Sf5!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Qd4#
      • 1...Sxe8
        • 2.e4#
      • 1...Sb5
        • 2.dxc4#
      • 1...Rh4
        • 2.Sxc7#
      • 1...Se4
        • 2.dxe4#
      • 1...Sf5
        • 2.e4#
      • 1...Sb7
        • 2.e4#
      • 1...Sf7
        • 2.Sxc7#
      • 1...Sc8
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(l);N_GUARD::S(G),XB(k)
    • S(h);N_GUARD,N_SPINS(d),S_CUTB(f)::QAB1(A),XP(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(h);N_GUARD,N_SPINS(d),S_CUTB(f)::QAB1(A),XP(b)
      • Refutation
        • S(h);
  • Actual
    • Q(A);XP(c)
    • Threat
      • QAR1(A)
    • Vars
      • S(h);N_GUARD,P_PINQ(A),XS(G)::P(B)
      • S(h);N_GUARD,N_SPINS(d),P_PINQ(A),S_CUTB(f)::P(D),XP(b)
      • R(l);N_GUARD::S(G),XB(k)
      • S(h);OGATE,P_PINQ(A)::P(D),XS(h)
      • S(h);N_GUARD,P_PINQ(A)::P(B)
      • S(h);N_SPINR(i),P_PINQ(A),S_CUTR(l)::S(G),XB(k)
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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).