MESON Chess Problem Database

Problem Display
PID: 179547 (3R4/1Q2N3/2P1R3/4P2K/rq2k1nn/4P1P1/5P2/2B1N3 w - - 0 1)

Davaine, Andre

diagrammes, 1974

3R4/1Q2N3/2P1R3/4P2K/rq2k1nn/4P1P1/5P2/2B1N3

#2

12 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe1
      • 2.c7#
    • 1...Qa3
      • 2.c7#
    • 1...Qa5
      • 2.Qb1#
    • 1...Qxe7
      • 2.Qb1#
    • 1...Qb1
      • 2.Qxb1#
    • 1...Ra1
      • 2.Qxb4#
    • 1...Ra2
      • 2.Qxb4#
    • 1...Ra3
      • 2.Qxb4#
    • 1...Ra5
      • 2.Qxb4#
    • 1...Ra6
      • 2.Qxb4#
    • 1...Ra7
      • 2.Qxb4#
    • 1...Ra8
      • 2.Qxb4#
    • 1...Sf6+
      • 2.exf6#
    • 1...Sg2
      • 2.f3#
    • 1...Sf5
      • 2.f3#
    • 1...Sg6
      • 2.f3#
  • Keys
    • 1.Rf8!
      • threat
        • 2.Rf4#
      • 1...Sf6+
        • 2.exf6#
      • 1...Qxe1
        • 2.Qb1#
      • 1...Qxe7
        • 2.c7#
      • 1...Sg2
        • 2.f3#
      • 1...Sf5
        • 2.f3#
      • 1...Sg6
        • 2.f3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(b);N_GUARD,XS(B)::QAB(J)+P(H)
    • Q(b);N_GUARD::QAB(J)+P(H)
    • Q(b);OGATE,P_PINP(F)::QAB(J)
    • Q(b);OGATE,XS(K)::QAB(J)
    • Q(b);OGATE::QAB(J),XQ(b)
    • R(a);N_GUARD::QAR(J),XQ(b)
    • R(a);N_GUARD,P_PINP(F)::QAR(J),XQ(b)
    • S(d);CHECK,OGATE::R(I)+P(F),XS(d)
    • S(e);N_GUARD::P(C)
  • Actual
    • R(L);
    • Threat
      • R1(L)
    • Vars
      • S(d);CHECK,OGATE::R(I)+P(F),XS(d)
      • Q(b);OGATE,XS(B)::QAB(J)
      • Q(b);N_GUARD,XS(K)::QAB(J)+P(H)
      • S(e);N_GUARD::P(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).