MESON Chess Problem Database

Problem Display
PID: 267493 (8/bb2Pr2/p6B/6r1/Q4n2/1p1Pk3/1N2N3/3K1R2 w - - 0 1)

Ceriani, Luigi

L'Echiquier, 1928

8/bb2Pr2/p6B/6r1/Q4n2/1p1Pk3/1N2N3/3K1R2

#2

8 + 8

15601 Albrecht-Leiss-Degener Collection 2022
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qd4#
    • 1...Rd5
      • 2.Qe4#
    • 1...Rxe7
      • 2.Qxf4#
    • 1...Rg7
      • 2.Qxf4#
    • 1...Rh7
      • 2.Qxf4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bb8
      • 2.Qd4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bc8
      • 2.Qe4#
    • 1...Sd5
      • 2.Qe4#
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qc1#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Rc5
        • 2.Qd4#
      • 1...Sxe2!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sc4#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Rc5
        • 2.Qd4#
      • 1...Rd5
        • 2.Qh3#
      • 1...Bd4
        • 2.Qxd4#
      • 1...Bd5
        • 2.Qxa7#
      • 1...Sd5
        • 2.Qe6#

Anticipated by 21615(1920), 258923(1922)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(d);P_SPINS(c),S_CUTB(f)::QAB1(F)
    • R(d);P_PINP(E),P_SPINS(c),S_CUTB(g)::QAR1(F)
    • R(h);N_GUARD,XP(H)::QAB1(F),XS(c)
    • R(h);N_GUARD::QAB1(F),XS(c)
    • B(f);N_GUARD::QAB1(F),XB(f)
    • B(f);N_GUARD::QAB1(F)
    • B(g);N_GUARD::QAR1(F),XB(g)
    • B(g);N_GUARD::QAR1(F)
    • S(c);P_SPINR(d),S_CUTB(g)::QAR1(F)
  • Tries
    • Try
      • Q(F);
      • Threat
        • QAB(F)
      • Vars
        • S(c);OGATE,P_SPINR(d),XP(E)::QAR1(F),XS(c)
        • R(d);P_SPINS(c),S_CUTB(f)::QAB1(F)
      • Refutation
        • S(c);P_SPINR(d),XS(D)
  • Actual
    • Q(F);
    • Threat
      • S(C)
    • Vars
      • S(c);OGATE,P_SPINR(d),XP(E)::QAR1(F),XS(c)
      • R(d);P_SPINS(c),S_CUTB(f)::QAB1(F)
      • R(d);N_GUARD,P_PINP(E),P_SPINS(c),S_CUTB(g)::QAR(F)
      • B(f);N_GUARD::QAB1(F),XB(f)
      • B(g);OGATE::QAB(F),XB(f)
      • S(c);N_GUARD,P_SPINR(d),S_CUTB(g)::QAR(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).