MESON Chess Problem Database

Problem Display
PID: 204396 (3B4/5Nrn/nK2k1p1/1B3Rp1/pp1P1p2/2N1bb2/2Qp1r2/4R2q w - - 0 1)

Santillan, Pascual

L'Alfiere di Re, 1925

3B4/5Nrn/nK2k1p1/1B3Rp1/pp1P1p2/2N1bb2/2Qp1r2/4R2q

#2

9 + 14

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Rxf6#
    • 1...Sf8
      • 2.Rf6#
  • Tries
    • 1.Sxg5+?
      • 1...Sxg5
        • 2.Rf6#
      • 1...Kd6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qc8#
      • 1...Bxd4+
        • 2.Sc5#
      • 1...Kxf5
        • 2.Bd7#
      • 1...Rxf7
        • 2.Re5#
      • 1...gxf5
        • 2.Qc4#
      • 1...Sf6
        • 2.Sexg5#
      • 1...Sc5
        • 2.Sxc5#
      • 1...Sc7
        • 2.Sc5#
      • 1...Sb8
        • 2.Sc5#
      • 1...Sf8
        • 2.Sexg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(n);N_GUARD::R1(F),XS(n)
    • S(n);N_GUARD::R1(F)
  • Tries
    • Try
      • S(H);CHECK,XP(i)
      • Vars
        • S(n);XS(H)::R1(F)
      • Refutation
        • K(k);N_SPINB(d),P-FLIGHT
  • Actual
    • S(C);N_PINB(d)
    • Threat
      • QAB(B)
    • Vars
      • B(d);CHECK,XP(D)::R(A)+S(C),DCHECK
      • K(k);S_FLIGHT,XR(F)::B(E)
      • R(m);SBLOCK,XS(H)::R1(F)
      • P(l);SBLOCK,XR(F)::QAB(B)
      • S(n);N_GUARD::S(C),XP(i)
      • S(j);N_GUARD,N_PINP(D)::S(C),XS(j)
      • S(j);N_GUARD::S(C)
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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).