MESON Chess Problem Database

Problem Display
PID: 201390 (7b/3K4/3N1P2/3kN2p/1PprR2r/1p1q1n2/2bRQ1B1/3n4 w - - 0 1)

Clark, Robert Winslow

L'Alfiere di Re, 1922

7b/3K4/3N1P2/3kN2p/1PprR2r/1p1q1n2/2bRQ1B1/3n4

#2

9 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Qxc4#
    • 1...Sxe5+
      • 2.Rxe5#
  • Keys
    • 1.Sg4!
      • threat
        • 2.Re5#
      • 1...Se5+
        • 2.Rxe5#
      • 1...Qxe2
        • 2.Rexd4#
      • 1...Qxe4
        • 2.Qxc4#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Bxf6
        • 2.Sxf6#
      • 1...Qe3
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(d);OGATE,P_SPINR(g)::QAB1(B),XP(f)
    • S(e);CHECK,OGATE,XS(F)::B(C)+R(E),DCHECK,XS(e)
  • Actual
    • S(F);
    • Threat
      • R1(E)
    • Vars
      • S(e);CHECK::B(C)+R(E),DCHECK,XS(e)
      • Q(d);N_GUARD,P_SPINR(g),XQ(B)::R1(E),XR(g)
      • Q(d);OGATE,P_SPINR(g),XR(E)::QAB1(B),XP(f)
      • R(g);OGATE,P_SPINQ(d),XR(E)::QAB1(B),XR(g)
      • B(k);XP(H)::S(F),XB(k)
      • Q(d);OGATE,P_SPINR(g)::QAB1(B),XP(f)
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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).