MESON Chess Problem Database

Problem Display
PID: 170048 (5Q2/4N2p/KPp1pn2/2N1k3/1Bnp1p1R/p5q1/4P3/3R4 w - - 0 1)

Ellerman, Arnoldo

Enroque!!, 1947

5Q2/4N2p/KPp1pn2/2N1k3/1Bnp1p1R/p5q1/4P3/3R4

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qb8#
    • 1...Sd2
      • 2.Qb8#
    • 1...Se3
      • 2.Qb8#
    • 1...Sa5
      • 2.Qb8#
    • 1...Sxb6
      • 2.Qb8#
    • 1...Se4
      • 2.Sd7#
    • 1...Sd5
      • 2.Sxc6#
    • 1...f3
      • 2.Sd3#
  • Tries
    • 1.Qxf6+?
      • 1...Kd6
        • 2.Rxd4#
        • 2.Qxe6#
      • 1...Kxf6!
  • Keys
    • 1.e4!
      • threat
        • 2.Sxc6#
      • 1...Kd6
        • 2.Sg6#
      • 1...Sxe4
        • 2.Sd7#
      • 1...dxe4 ep
        • 2.Bc3#
      • 1...fxe4 ep
        • 2.Sd3#
      • 1...Sa5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(c);N_GUARD::QAB(I)
    • S(c);N_GUARD,XP(G)::QAB(I)
    • S(i);N_GUARD,SBLOCK::S(E)
    • S(i);SBLOCK::S(H),XP(g)
    • P(e);S_CUTQ(b)::S(E)
  • Tries
    • Try
      • Q(I);CHECK,XS(i)
      • Refutation
        • K(f);S_FLIGHT,XQ(I)
  • Actual
    • P(B);
    • Threat
      • S(H),XP(g)
    • Vars
      • K(f);P_SPINP(d),S_FLIGHT::QAB(I)+S(H)
      • S(i);N_GUARD,SBLOCK,XP(B)::S(E)
      • P(d);EP,OGATEB,XP(B)::B(C)
      • P(e);EP,S_CUTQ(b),XP(B)::S(E)
      • S(c);N_GUARD::QAB(I)
HTML5 logo

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).