MESON Chess Problem Database

Problem Display
PID: 206330 (2Q4K/7R/8/3kN3/2Nnp3/4P3/3b4/2r1R3 w - - 0 1)

Redaelli, Riccardo

L'Alfiere di Re, 1925

2Q4K/7R/8/3kN3/2Nnp3/4P3/3b4/2r1R3

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qc6#
    • 1...Se2
      • 2.Qc6#
    • 1...Sb3
      • 2.Qc6#
    • 1...Sf3
      • 2.Qc6#
    • 1...Sb5
      • 2.Qc6#
    • 1...Sf5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Se6
      • 2.Rd7#
      • 2.Qc6#
  • Tries
    • 1.Qb7+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kc5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sf4#
      • 1...Rxc4
        • 2.Qd7#
      • 1...Bxe3
        • 2.Sb4#
      • 1...exd3
        • 2.e4#
      • 1...Sc6
        • 2.Qg8#
      • 1...Se2
        • 2.Rh5#
      • 1...Se6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • S(c);N_GUARD::QAB1(F)
    • S(c);N_GUARD::QAB1(F),XS(c)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(F)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(F),XS(c)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(a);SBLOCK,XS(C)::QAR2(F)
      • B(b);N_GUARD,XP(B)::S(D)
      • P(d);OGATE,XS(D)::P(B)
      • S(c);N_GUARD,SBLOCK::QAB(F)
      • S(c);N_GUARD::R(E)
      • S(c);SBLOCK::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).