MESON Chess Problem Database

Problem Display
PID: 86706 (2R4K/7p/4p2r/NpNP2Q1/3k4/n7/7n/4B1b1 w - - 0 1)

Gross, Erwin

Die Schwalbe, 1960

2R4K/7p/4p2r/NpNP2Q1/3k4/n7/7n/4B1b1

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Sab3#
    • 1...exd5
      • 2.Qf4#
    • 1...e5
      • 2.Qd2#
  • Tries
    • 1.dxe6?
      • threat
        • 2.Rd8#
      • 1...Sc4
        • 2.Sab3#
        • 2.Sc6#
      • 1...Rxe6!
  • Keys
    • 1.Rd8!
      • threat
        • 2.dxe6#
      • 1...Kxc5
        • 2.Qxg1#
      • 1...exd5
        • 2.Rxd5#
      • 1...Sc4
        • 2.Sab3#
      • 1...e5
        • 2.Qxg1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(c);SBLOCK::S(B)
    • P(f);SBLOCK,XP(D)::QAR2(E)
    • P(f);SBLOCK::QAR2(E)
  • Tries
    • Try
      • P(D);XP(f)
      • Threat
        • R(F)
      • Refutation
        • R(g);XP(D)
  • Actual
    • R(F);
    • Threat
      • R(F)+P(D),XP(f)
    • Vars
      • K(d);S_FLIGHT,XS(C)::QAB(E),XB(a)
      • P(f);OGATE,P_SPINP(f),XP(D)::R1(F),XP(f)
      • S(c);SBLOCK::S(B)
      • P(f);SBLOCK::QAB(E),XB(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).