MESON Chess Problem Database

Problem Display
PID: 205784 (1b5K/3Q1B2/3p1Np1/rrR5/p4n2/p2kBP2/3Pp3/1n6 w - - 0 1)

Baltins, Richard F

L'Alfiere di Re, 1925

1b5K/3Q1B2/3p1Np1/rrR5/p4n2/p2kBP2/3Pp3/1n6

#2

8 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxb5#
    • 1...Ra7
      • 2.Qxb5#
    • 1...Ra8
      • 2.Qxb5#
    • 1...Sc3
      • 2.Rxc3#
    • 1...Sg2
      • 2.Bxg6#
    • 1...Sh3
      • 2.Bxg6#
    • 1...Sd5
      • 2.Bxg6#
    • 1...Sh5
      • 2.Bxg6#
    • 1...Se6
      • 2.Bxg6#
    • 1...g5
      • 2.Qf5#
  • Tries
    • 1.Qxd6+?
      • 1...Sd5
        • 2.Bxg6#
        • 2.Qxd5#
      • 1...Bxd6!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sxf4#
      • 1...Rxc5
        • 2.Sb4#
      • 1...Sxd2
        • 2.Rc3#
      • 1...Sxd5
        • 2.Bxg6#
      • 1...dxc5
        • 2.Sb4#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Rb4
        • 2.Sxb4#
      • 1...Sg2
        • 2.Bxg6#
      • 1...Sh3
        • 2.Bxg6#
      • 1...Sh5
        • 2.Bxg6#
      • 1...Se6
        • 2.Bxg6#
      • 1...g5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD::QAB(F),XR(h)
    • S(a);N_GUARD::R1(D),XS(a)
    • S(f);N_GUARD::B(G),XP(j)
    • S(f);N_GUARD,N_SPINP(i)::B(G),XP(j)
    • P(j);N_GUARD::QAB(F)
  • Tries
    • Try
      • Q(F);CHECK,XP(i)
      • Refutation
        • B(k);XQ(F)
  • Actual
    • S(E);N_PINP(i)
    • Threat
      • S(E),XS(f)
    • Vars
      • R(h);N_GUARD,XR(D)::S(E)
      • S(a);N_GUARD,XP(A)::R1(D)
      • S(f);N_GUARD,XS(E)::B(G),XP(j)
      • P(i);XR(D)::QAR(F)+S(E),DCHECK
      • S(a);N_GUARD::R1(D),XS(a)
      • R(h);N_GUARD::S(E),XR(h)
      • S(f);N_GUARD::B(G),XP(j)
      • P(j);N_GUARD::QAB(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).