MESON Chess Problem Database

Problem Display
PID: 201381 (2n5/4N3/8/1Nr1P2K/1Rb1kP1R/4p2p/n3Q1r1/7B w - - 0 1)

Behting, Karl Karlovich

L'Alfiere di Re, 1922

2n5/4N3/8/1Nr1P2K/1Rb1kP1R/4p2p/n3Q1r1/7B

#2

9 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Rxc4#
    • 1...Rxe5+
      • 2.f5#
    • 1...h2
      • 2.Bxg2#
  • Keys
    • 1.Qd1!
      • 1...Rxe5+
        • 2.f5#
      • 1...Rxb5
        • 2.Rxc4#
      • 1...Sxb4
        • 2.Sc3#
      • 1...Sxe7
        • 2.Sd6#
      • 1...e2
        • 2.Qxe2#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Rc6
        • 2.Qd5#
      • 1...Rc7
        • 2.Qd5#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#
      • 1...Sb6
        • 2.Sd6#
      • 1...Sd6
        • 2.Sxd6#
      • 1...Sa7
        • 2.Sd6#
      • 1...h2
        • 2.Bxg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD,XS(F)::R(C),XB(e)
    • R(g);CHECK,SBLOCK,XP(G)::R(E)+P(D)
    • P(d);N_GUARD::B(A),XR(b)
  • Actual
    • Q(B);N_PINP(c)
    • Vars
      • R(g);CHECK,SBLOCK,XP(G)::R(E)+P(D)
      • R(g);N_GUARD,XS(F)::R(C),XB(e)
      • S(a);N_GUARD,N_SPINB(e),XR(C)::S(F)
      • S(h);N_GUARD,XS(I)::S(F)
      • P(c);OGATEB::QAR2(B),XP(c)
      • R(g);N_GUARD::QAB1(B),XR(g)
      • R(g);N_GUARD,N_PINP(G)::QAB1(B)
      • S(a);N_GUARD::S(F)
      • S(a);N_GUARD::S(F),XS(a)
      • S(h);N_GUARD::S(F)
      • S(h);N_GUARD::S(F),XS(h)
      • P(d);N_GUARD::B(A),XR(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).