MESON Chess Problem Database

Problem Display
PID: 168474 (3n3b/1pQb1pB1/1K1p1r2/3p4/2Nk1P2/2pP2R1/8/8 w - - 0 1)

Petite, Efren

Problemas, 1957

3n3b/1pQb1pB1/1K1p1r2/3p4/2Nk1P2/2pP2R1/8/8

#2

7 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...dxc4
      • 2.Qxd6#
      • 2.Qxc4#
  • Tries
    • 1.Sa3?
      • threat
        • 2.Sc2#
      • 1...c2
        • 2.Sxc2#
      • 1...Ba4!
    • 1.Se3?
      • threat
        • 2.Sc2#
      • 1...Ba4
        • 2.Sf5#
      • 1...c2
        • 2.Sxc2#
      • 1...Kxd3!
    • 1.Bxh8?
      • threat
        • 2.Bxf6#
      • 1...dxc4
        • 2.Qxd6#
        • 2.Qxc4#
      • 1...Sc6!
    • 1.Qxd6?
      • threat
        • 2.Qxf6#
      • 1...Be6
        • 2.Qc5#
        • 2.Qe5#
      • 1...Sc6
        • 2.Qc5#
      • 1...Se6
        • 2.Qe5#
      • 1...Bxg7!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Qc5#
      • 1...Bc6
        • 2.Sf5#
      • 1...Sc6
        • 2.Sb5#
      • 1...Se6
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • P(a);::S(C),XP(a)
      • Refutation
        • B(g);
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • B(g);N_GUARD::S(C)
        • P(a);::S(C),XP(a)
      • Refutation
        • K(b);N_SPINR(e),P-FLIGHT,XP(A)
    • Try
      • B(G);XB(j)
      • Threat
        • B(G),XR(e)
      • Refutation
        • S(i);
    • Try
      • Q(F);P_PINP(c),P_SPINQ(F),XP(d)
      • Threat
        • QAB(F),XR(e)
      • Vars
        • S(i);N_PINQ(F)::QAB1(F)
      • Refutation
        • B(j);N_SPINR(e),XB(G)
  • Actual
    • S(C);P_SPINS(C),XP(d)
    • Threat
      • QAB1(F)
    • Vars
      • B(g);N_PINS(C)::S(C)
      • S(i);N_PINS(C)::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).