MESON Chess Problem Database

Problem Display
PID: 101082 (2B3RB/2P4n/1pr1r3/1P3k2/2R1Nb2/6p1/1Q4P1/K4n2 w - - 0 1)

Malmstrom, Birger Georg Christens

Good Companions, 1921

2B3RB/2P4n/1pr1r3/1P3k2/2R1Nb2/6p1/1Q4P1/K4n2

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bc1
      • 2.Qe5#
    • 1...Bd2
      • 2.Qe5#
    • 1...Be3
      • 2.Qe5#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bh6
      • 2.Qe5#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sf8
      • 2.Qf6#
  • Tries
    • 1.Sxg3+?
      • 1...Bxg3
        • 2.Qb1#
        • 2.Qc2#
      • 1...Sxg3!
    • 1.Sd6+?
      • 1...Bxd6
        • 2.Qb1#
        • 2.Qc2#
      • 1...Rxd6!
  • Keys
    • 1.Qf2!
      • 1...Rxc4
        • 2.Sd6#
      • 1...Rxc7
        • 2.Sd6#
      • 1...gxf2
        • 2.g4#
      • 1...Sg5
        • 2.Rxg5#
      • 1...Sf6
        • 2.Rg5#
      • 1...Rd6
        • 2.Sxd6#
      • 1...Rc5
        • 2.Sd6#
      • 1...Sd2
        • 2.Sxg3#
      • 1...Sh2
        • 2.Sxg3#
      • 1...Se3
        • 2.Sxg3#
      • 1...Sf8
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 5
  • Sets
    • B(c);N_GUARD::QAR1(B)
    • B(c);N_GUARD,P_PINQ(B)::QAR1(B),XB(c)
    • S(h);N_GUARD::QAR1(B),XS(h)
    • S(h);N_GUARD::QAR1(B)
  • Tries
    • Try
      • S(E);CHECK,XP(b)
      • Refutation
        • S(a);XS(E)
    • Try
      • S(E);CHECK
      • Refutation
        • R(f);XS(E)
  • Actual
    • Q(B);P_PINB(c)
    • Vars
      • R(f);N_GUARD,XR(D)::S(E)
      • R(f);N_GUARD,XP(G)::S(E)
      • P(b);N_SPINB(c),OGATE,XQ(B)::P(C)
      • S(h);N_GUARD::R1(I),XS(h)
      • S(h);N_GUARD::R1(I)
      • R(f);N_GUARD::S(E),XR(f)
      • R(f);N_GUARD::S(E)
      • S(a);N_GUARD::S(E),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).