MESON Chess Problem Database

Problem Display
PID: 70731 (4n3/3qppb1/1PpBkN1p/R7/2P5/8/3R1N2/4KQ2 w - - 0 1)

Overkamp, Petrus

1st HM., Problem (Zagreb), 1951

4n3/3qppb1/1PpBkN1p/R7/2P5/8/3R1N2/4KQ2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6
      • 2.Qh3#
    • 1...Sxf6
      • 2.Re5#
    • 1...exf6
      • 2.Qe2#
  • Tries
    • 1.S2g4?
      • threat
        • 2.Re5#
        • 2.Qe2#
        • 2.Qf5#
      • 1...Qxd6
        • 2.Qf5#
      • 1...Bxf6
        • 2.Qf5#
      • 1...Sxd6
        • 2.Re5#
      • 1...Sxf6
        • 2.Re5#
        • 2.Qf5#
      • 1...exd6
        • 2.Re2#
        • 2.Qe2#
      • 1...exf6
        • 2.Qe2#
        • 2.Qf5#
      • 1...c5!
    • 1.Re2+?
      • 1...Kxd6
        • 2.c5#
      • 1...Kxf6!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sc5#
      • 1...Kxd6
        • 2.Sf4#
      • 1...Qxd6
        • 2.Qf5#
      • 1...Sxd6
        • 2.Re5#
      • 1...exd6
        • 2.Re2#
      • 1...c5
        • 2.Sxc5#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(g);SBLOCK,XS(I)::QAB(B)
    • S(h);SBLOCK,XS(I)::R1(F)
    • P(e);SBLOCK,XS(I)::QAR(B)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Vars
        • Q(d);XB(H)::QAB1(B)
        • B(g);XS(I)::QAB1(B)
        • S(h);XB(H)::R1(F)
      • Refutation
        • P(a);
    • Try
      • R(C);CHECK
      • Vars
        • K(b);P-FLIGHT,XB(H)::P(E)
      • Refutation
        • K(b);P-FLIGHT,XS(I)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(b);P-FLIGHT,XB(H)::R(C)+S(D)
      • Q(d);SBLOCK,XB(H)::QAB1(B)
      • S(h);SBLOCK,XB(H)::R1(F)
      • P(e);SBLOCK,XB(H)::R(C)
      • P(a);::S(D),XP(a)
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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).