MESON Chess Problem Database

Problem Display
PID: 202291 (b6Q/K1N3P1/2pp2p1/4P3/3k1r2/1PR2B2/2P4p/B5b1 w - - 0 1)

Carra, Arturo

L'Alfiere di Re, 1923

b6Q/K1N3P1/2pp2p1/4P3/3k1r2/1PR2B2/2P4p/B5b1

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5+
      • 2.Rc5#
    • 1...Be3
      • 2.Rc4#
      • 2.Rxc6#
    • 1...c5
      • 2.Rd3#
    • 1...dxe5
      • 2.Se6#
      • 2.Qd8#
  • Tries
    • 1.Kb6?
      • threat
        • 2.Rd3#
      • 1...Kxe5+
        • 2.Rc5#
      • 1...Rxf3!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Qxf4#
      • 1...Kxe5+
        • 2.Rc5#
      • 1...Rxf3
        • 2.Rc4#
      • 1...dxe5
        • 2.Se6#
      • 1...Re4
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rg4
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rh4
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rf5
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rf6
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rf7
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Rf8
        • 2.Rc4#
        • 2.Rxc6#
      • 1...Be3
        • 2.Rc4#
        • 2.Rxc6#
      • 1...c5
        • 2.Rd3#
      • 1...g5
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);CHECK,S_FLIGHT,XP(F)::B(A)+R(D),DCHECK
    • P(e);SBLOCK::B(A)+R(D),DCHECK
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Threat
        • B(A)+R(D),DCHECK
      • Vars
        • K(c);CHECK,S_FLIGHT,XP(F)::B(A)+R(D),DCHECK
      • Refutation
        • R(d);XB(E)
  • Actual
    • Q(J);
    • Threat
      • QAR2(J),XR(d)
    • Vars
      • K(c);CHECK,S_FLIGHT,XP(F)::B(A)+R(D),DCHECK
      • R(d);XB(E)::B(A)+R(D),DCHECK
      • P(f);SBLOCK,XP(F)::S(H)
      • P(e);SBLOCK::B(A)+R(D),DCHECK
      • P(g);OGATE::QAR2(J),XP(f)
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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).