MESON Chess Problem Database

Problem Display
PID: 90577 (4R3/8/pp3K2/8/r2k1pp1/N5r1/1bQ1b1B1/1N6 w - - 0 1)

Barron, Philip

Die Schwalbe, 1949

4R3/8/pp3K2/8/r2k1pp1/N5r1/1bQ1b1B1/1N6

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re3
      • 2.Rd8#
  • Tries
    • 1.Qxb2+?
      • 1...Kd3
        • 2.Qc3#
        • 2.Qd2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Kc5!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qe4#
      • 1...Rd3
        • 2.Qxa4#
      • 1...Re3
        • 2.Rd5#
      • 1...Bd3
        • 2.Qxb2#
      • 1...Bf3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::R(F)
  • Tries
    • Try
      • Q(B);CHECK,XB(a)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(B),XR(c)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAR1(B)
    • Vars
      • R(c);SBLOCK,S_CUTB(b)::QAR(B),XR(d)
      • R(c);SBLOCK::R1(F)
      • B(b);SBLOCK,S_CUTR(c)::QAB(B),XB(a)
      • B(b);N_GUARD,S_CUTR(c)::QAR2(B)
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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).