MESON Chess Problem Database

Problem Display
PID: 204413 (6b1/3PKn2/p7/P3k2n/QprN1pP1/3q1B2/3P4/8 w - - 0 1)

Weiss, Berthold

L'Alfiere di Re, 1925

6b1/3PKn2/p7/P3k2n/QprN1pP1/3q1B2/3P4/8

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Sxc6#
  • Tries
    • 1.Qb5+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Rc5
        • 2.Sc6#
        • 2.Qxc5#
      • 1...axb5!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qd5#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Qxf3
        • 2.Sxf3#
      • 1...Qxd4
        • 2.Qe6#
      • 1...Rxd4
        • 2.Qe6#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sh8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::S(D),XR(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);S_FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(e);S_FLIGHT,XS(D)::QAR1(C)
      • Q(a);XB(B)::S(D),XQ(a)
      • Q(a);SBLOCK,XS(D)::QAR1(C)
      • R(c);SBLOCK,XS(D)::QAR1(C)
      • R(c);XQ(C)::S(D),XR(c)
      • Q(a);N_GUARD::QAR1(C),XQ(a)
      • R(c);N_GUARD::QAR2(C),XR(c)
      • S(f);N_GUARD::QAB1(C),XS(f)
      • S(h);N_GUARD::QAB1(C)
      • S(h);N_GUARD::QAB1(C),XS(h)
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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).