MESON Chess Problem Database

Problem Display
PID: 152548 (2N1B2K/2q1pQ2/3p1p2/r1n1Bk2/1p1R3P/3p1P1P/8/5R2 w - - 0 1)

Petite, Efren

L'Italia Scacchistica, 1985

2N1B2K/2q1pQ2/3p1p2/r1n1Bk2/1p1R3P/3p1P1P/8/5R2

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Qd5#
    • 1...e6
      • 2.Qh5#
      • 2.Qxf6#
  • Tries
    • 1.Sxd6+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...exd6
        • 2.Qxf6#
      • 1...Qxd6!
    • 1.Sxe7+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...Qxe7!
    • 1.Qd5?
      • threat
        • 2.Rf4#
      • 1...fxe5
        • 2.Qf7#
      • 1...Se4
        • 2.fxe4#
      • 1...Se6
        • 2.Qe4#
      • 1...dxe5!
  • Keys
    • 1.Bxf6!
      • threat
        • 2.Bg7#
      • 1...exf6
        • 2.Qd5#
      • 1...Se4
        • 2.fxe4#
      • 1...Sd7
        • 2.Sxe7#
      • 1...e5
        • 2.Be7#
      • 1...e6
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINP(g),OGATEB,P-FLIGHT,XB(F)::QAR1(G)
  • Tries
    • Try
      • S(H);CHECK,XP(f)
      • Vars
        • K(e);N_SPINP(g),P-FLIGHT,XB(F)::QAR1(G)
        • P(i);XS(H)::QAR1(G),XP(g)
      • Refutation
        • Q(h);XS(H)
    • Try
      • S(H);CHECK,XP(i)
      • Vars
        • K(e);N_SPINP(g),P-FLIGHT,XB(F)::QAR1(G)
      • Refutation
        • Q(h);XS(H)
    • Try
      • Q(G);N_PINP(g)
      • Threat
        • R1(D)
      • Vars
        • P(g);OGATEB,P_SPINP(g),SBLOCK,XB(F)::QAR2(G)
        • S(d);OGATE::R(A)+P(B)DCHECK,XS(d)
        • S(d);N_GUARD,SBLOCK::QAB1(G)
      • Refutation
        • P(f);P_SPINP(f),XB(F)
  • Actual
    • B(F);XP(g)
    • Threat
      • QAR(G)+B(F)
    • Vars
      • P(i);N_GUARD,P_SPINP(i),SBLOCK,XB(F)::QAR2(G)
      • S(d);OGATE::R(A)+P(B)DCHECK,XS(d)
      • S(d);S_CUTQ(h)::S(H),XP(i)
      • P(i);SBLOCK::QAR(G)+B(F)
      • P(i);SBLOCK::QAB1(G)
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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).