MESON Chess Problem Database

Problem Display
PID: 204357 (8/3p2KB/2p1P3/3k1N1R/2qB4/3pP3/Qn6/b1R5 w - - 0 1)

Jorio, Arturo

L'Alfiere di Re, 1925

8/3p2KB/2p1P3/3k1N1R/2qB4/3pP3/Qn6/b1R5

#2

9 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sh4#
    • 1...Kxe6
      • 2.Bg8#
  • Tries
    • 1.Qxc4+?
      • 1...Ke4
        • 2.Sh4#
      • 1...Sxc4!
    • 1.e4+?
      • 1...Kxe6
        • 2.Bg8#
        • 2.Rh6#
      • 1...Kxe4!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Sd4#
      • 1...Ke4
        • 2.Sh4#
      • 1...Kxc5
        • 2.Qa5#
      • 1...Ke5
        • 2.Sd4#
      • 1...Kxe6
        • 2.Sd4#
      • 1...dxe6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINQ(d),S_FLIGHT::B(I)+S(E)
    • K(e);OGATEB,S_FLIGHT,XP(G)::B(I)
  • Tries
    • Try
      • Q(B);CHECK,XQ(d)
      • Vars
        • K(e);S_FLIGHT::B(I)+S(E)
      • Refutation
        • S(b);P_PINB(D),XQ(B)
    • Try
      • P(C);CHECK
      • Refutation
        • K(e);N_SPINQ(d),S_FLIGHT,XP(C)
  • Actual
    • B(D);
    • Threat
      • R(F)+S(E)
    • Vars
      • K(e);N_SPINQ(d),S_FLIGHT::B(I)+S(E)
      • K(e);OGATEB,P-FLIGHT,XB(D)::QAR2(B)
      • K(e);N_SPINQ(d),P-FLIGHT::R(F)+S(E)
      • K(e);S_FLIGHT,XP(G)::S(E)
      • P(g);SBLOCK,XP(G)::R(F)+S(E),DCHECK
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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).