MESON Chess Problem Database

Problem Display
PID: 84867 (n1rR4/QB3pBp/1q1p3K/3pp3/1PNkNP2/1PRb1P2/1r1P4/8 w - - 0 1)

Petite, Efren

Schakend Nederland, 1962

n1rR4/QB3pBp/1q1p3K/3pp3/1PNkNP2/1PRb1P2/1r1P4/8

#2

13 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Qxb6#
    • 1...dxc4
      • 2.Bxe5#
      • 2.Rxd6#
    • 1...dxe4
      • 2.Bxe5#
      • 2.Rxd6#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sf5#
      • 1...f5
        • 2.Sxf5#
      • 1...Bxe4!
    • 1.Scxd6?
      • threat
        • 2.Bxe5#
      • 1...f6
        • 2.Sf5#
      • 1...Rxd2!
    • 1.Rxd6?
      • threat
        • 2.Bxe5#
      • 1...f6
        • 2.Rxd5#
      • 1...Re8!
  • Keys
    • 1.Sexd6!
      • threat
        • 2.Bxe5#
      • 1...f6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(j);N_GUARD,S_CUTR(k)::QAB(J),XQ(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • S(F)
      • Vars
        • P(h);::S(F),XP(h)
      • Refutation
        • B(b);XS(G)
    • Try
      • S(F);P_SPINS(F),XP(g)
      • Threat
        • B(L),XP(e)
      • Vars
        • P(h);N_PINS(F),N_SPINP(e)::S(F)
      • Refutation
        • R(a);XP(A)
    • Try
      • R(M);N_PINP(e),P_PINP(d),P_SPINR(M),XP(g)
      • Threat
        • B(L),XP(e)
      • Vars
        • P(h);N_PINR(M)::R1(M),XP(d)
      • Refutation
        • R(k);
  • Actual
    • S(G);P_SPINS(G),XP(g)
    • Threat
      • B(L),XP(e)
    • Vars
      • P(h);N_PINS(G),N_SPINP(e)::S(G)
HTML5 logo

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).