MESON Chess Problem Database

Problem Display
PID: 90594 (bQ6/2p5/1bpr1p2/8/2n3N1/3p1R2/N1PkP3/2R2B1K w - - 0 1)

Beck, Friedrich

Die Schwalbe, 1960

bQ6/2p5/1bpr1p2/8/2n3N1/3p1R2/N1PkP3/2R2B1K

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Rxd3#
    • 1...Bg1
      • 2.Qb4#
    • 1...Bf2
      • 2.Qb4#
    • 1...Be3
      • 2.Qb4#
    • 1...Bd4
      • 2.Rxd3#
    • 1...Ba7
      • 2.Qb4#
  • Tries
    • 1.e3?
      • threat
        • 2.Rf2#
      • 1...Bxe3
        • 2.Qb4#
      • 1...c5!
  • Keys
    • 1.Rf2!
      • threat
        • 2.e3#
      • 1...c5+
        • 2.e4#
      • 1...Bxf2
        • 2.Qb4#
      • 1...dxe2
        • 2.Rxe2#
      • 1...Be3
        • 2.Qb4#
      • 1...Se3
        • 2.exd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::R1(G),XP(b)
    • B(d);OGATE::QAB(I)
    • B(d);S_CUTR(f)::R1(G),XP(b)
  • Tries
    • Try
      • P(F);
      • Threat
        • R(G)
      • Vars
        • B(d);OGATE,XP(F)::QAB(I)
      • Refutation
        • P(e);P_PINR(G)
  • Actual
    • R(G);
    • Threat
      • R(G)+P(F)
    • Vars
      • P(e);CHECK,S_CUTB(d)::R(G)+P(F)
      • B(d);OGATE,XR(G)::QAB(I)
      • P(b);OGATE,P_SPINP(b),XP(F)::R1(G),XP(b)
      • B(d);OGATE::QAB(I)
      • S(c);S_CUTB(d)::R(G)+P(F),XP(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).