MESON Chess Problem Database

Problem Display
PID: 275645 (8/1p1Q2Kn/6p1/2B1pP2/1qbNk3/4P1RB/2PnPR2/8 w - - 0 1)

Pereira, Alvaro

Quaresma, Luis

Die Schwalbe, 2023

8/1p1Q2Kn/6p1/2B1pP2/1qbNk3/4P1RB/2PnPR2/8

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.cxd3#
      • 2.exd3#
    • 1...Sb1
      • 2.Bg2#
    • 1...Sf1
      • 2.Bg2#
    • 1...Sb3
      • 2.Bg2#
    • 1...exd4
      • 2.Qxd4#
    • 1...gxf5
      • 2.Bxf5#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Rg4#
      • 1...Qxc5
        • 2.Sc3#
      • 1...Bxe2
        • 2.Qxb7#
      • 1...gxf5
        • 2.Bxf5#
      • 1...Sf6!
    • 1.Se6?
      • threat
        • 2.Rg4#
      • 1...Qxc5
        • 2.Sxc5#
      • 1...gxf5
        • 2.Bxf5#
      • 1...Sf6
        • 2.Sg5#
      • 1...Sf3
        • 2.exf3#
      • 1...Bxe2!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Rg4#
      • 1...Qxc5
        • 2.Sxd2#
      • 1...gxf5
        • 2.Bxf5#
      • 1...Be6
        • 2.Qd3#
      • 1...Sf6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::B(F)
    • P(e);OGATE,XS(G)::QAR1(J),XP(e)
    • P(f);OGATE,XP(I)::B(F),XP(f)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(E)
      • Vars
        • Q(b);N_GUARD,XB(H)::S(G)
        • B(c);N_GUARD,XP(B)::QAB(J),XP(g)
        • P(f);OGATE,XP(I)::B(F),XP(f)
      • Refutation
        • S(h);
    • Try
      • S(G);
      • Threat
        • R(E)
      • Vars
        • Q(b);XB(H)::S(G),XQ(b)
        • P(f);OGATE,XP(I)::B(F),XP(f)
        • S(h);N_GUARD::S(G)
        • S(a);OGATE::P(B),XS(a)
      • Refutation
        • B(c);XP(B)
  • Actual
    • S(G);
    • Threat
      • R(E)
    • Vars
      • Q(b);N_GUARD,XB(H)::S(G),XS(a)
      • P(f);OGATE,XP(I)::B(F),XP(f)
      • B(c);N_GUARD::QAB1(J)
      • S(h);N_GUARD::S(G)
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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).