MESON Chess Problem Database

Problem Display
PID: 170054 (3RB2K/1n2B3/4kPN1/1P6/2brp1P1/n1Q5/8/q1b5 w - - 0 1)

Valdez, Carlos F

Enroque!!, 1947

3RB2K/1n2B3/4kPN1/1P6/2brp1P1/n1Q5/8/q1b5

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sf8#
    • 1...Rd2
      • 2.Sf4#
      • 2.Sf8#
    • 1...Rd3
      • 2.Sf8#
    • 1...Rd5
      • 2.Sf8#
    • 1...Bd5
      • 2.Qc8#
  • Tries
    • 1.Qxd4?
      • threat
        • 2.Sf8#
        • 2.Qd7#
      • 1...Bxb5
        • 2.Sf8#
        • 2.Qd5#
      • 1...Bh6
        • 2.Qd7#
      • 1...Bd5
        • 2.Sf8#
        • 2.Qxd5#
      • 1...Sc5
        • 2.Sf8#
        • 2.Rd6#
        • 2.Qd6#
      • 1...Sd6
        • 2.Sf8#
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Qxd4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Bf7#
      • 1...Rxd5
        • 2.Sf8#
      • 1...Bxd5
        • 2.Qc8#
      • 1...Bf4
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);::S(E)
    • B(d);OGATE::QAB(A)
  • Tries
    • Try
      • Q(A);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAB1(A)
      • Refutation
        • Q(a);P_PINP(D),XQ(A)
  • Actual
    • R(G);
    • Threat
      • R1(G)
    • Vars
      • K(g);S_FLIGHT,XR(G)::B(H)
      • R(e);SBLOCK,XR(G)::S(E)
      • B(d);OGATE,SBLOCK,XR(G)::QAB(A)
      • B(b);N_GUARD::S(E),XB(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).