MESON Chess Problem Database

Problem Display
PID: 170022 (8/K1Q5/2pNpN2/B1k1r3/2B1n2R/8/8/8 w - - 0 1)

Morra, Juan Carlos

Enroque!!, 1946

8/K1Q5/2pNpN2/B1k1r3/2B1n2R/8/8/8

#2

7 + 5

81 Chess 1955
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Sb7#
      • 2.Sd7#
    • 1...Sf2
      • 2.Sb7#
      • 2.Sd7#
    • 1...Sc3
      • 2.Sb7#
      • 2.Sd7#
    • 1...Sg3
      • 2.Sb7#
      • 2.Sd7#
    • 1...Sg5
      • 2.Sb7#
      • 2.Sd7#
    • 1...Sxd6
      • 2.Sd7#
      • 2.Qb6#
    • 1...Sxf6
      • 2.Sb7#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Sd7#
      • 1...Sxf6
        • 2.Sb7#
      • 1...Sxc3!
  • Keys
    • 1.Qg7!
      • 1...Kd4
        • 2.Qg1#
      • 1...Kxd6
        • 2.Qf8#
      • 1...Sxd6
        • 2.Sd7#
      • 1...Sxf6
        • 2.Sb7#
      • 1...Rd5
        • 2.Sfxe4#
      • 1...Rf5
        • 2.Sfxe4#
      • 1...Rg5
        • 2.Sfxe4#
      • 1...Rh5
        • 2.Sfxe4#
      • 1...Sd2
        • 2.Sb7#
      • 1...Sf2
        • 2.Sb7#
      • 1...Sc3
        • 2.Sb7#
      • 1...Sg3
        • 2.Sb7#
      • 1...Sg5
        • 2.Sb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • S(a);XS(E)::S(D)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • S(a);XS(E)::S(D)
      • Refutation
        • S(a);XB(C)
  • Actual
    • Q(G);N_PINP(d)
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::QAB(G)
      • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(G)
      • S(a);SBLOCK,XS(D)::S(E)
      • S(a);XS(E)::S(D)
      • R(c);N_GUARD::S(E),XS(a)
      • S(a);::S(D)
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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).