MESON Chess Problem Database

Problem Display
PID: 202359 (5rbb/B3Q2p/R1P5/1B1k1p2/n2N4/2p2N1K/1p6/1n6 w - - 0 1)

Pasqualini, Giulio

L'Alfiere di Re, 1923

5rbb/B3Q2p/R1P5/1B1k1p2/n2N4/2p2N1K/1p6/1n6

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Qe5#
    • 1...Rf7
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Be5
      • 2.Qxe5#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Se3#
        • 2.Sb4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bd4
        • 2.Sb4#
      • 1...f4
        • 2.Sb4#
      • 1...Be6!
    • 1.c7?
      • threat
        • 2.Rd6#
      • 1...Be6
        • 2.Qxe6#
      • 1...Be5
        • 2.Qxe5#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rd8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Sb6!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qd7#
      • 1...Rf6
        • 2.Qe5#
      • 1...Rf7
        • 2.Qe6#
      • 1...Rd8
        • 2.Qxd8#
      • 1...Be6
        • 2.Qxe6#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sb6
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(h);S_CUTB(j)::QAR1(H)
    • R(h);S_CUTB(i)::QAB1(H)
    • B(i);N_GUARD::QAB1(H),XB(i)
    • B(j);N_GUARD::QAR1(H),XB(j)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);N_GUARD::QAR1(H),XB(j)
        • B(j);::S(C)
        • P(f);::S(C)
      • Refutation
        • B(i);
    • Try
      • P(F);
      • Threat
        • R1(E)
      • Vars
        • B(i);N_GUARD::QAB1(H),XB(i)
        • B(j);N_GUARD::QAR1(H),XB(j)
        • R(h);S_CUTB(j)::QAR1(H)
        • R(h);OGATE::PXR(h)=Q
      • Refutation
        • S(d);
  • Actual
    • B(D);
    • Threat
      • QAR2(H)
    • Vars
      • R(h);S_CUTB(j)::QAR1(H)
      • R(h);S_CUTB(i)::QAB1(H)
      • R(h);N_GUARD::QAR(H),XR(h)
      • B(i);N_GUARD::QAB1(H),XB(i)
      • B(j);N_GUARD::QAR1(H),XB(j)
      • S(d);N_GUARD::QAR1(H),XS(d)
      • S(d);N_GUARD::R(E)
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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).