MESON Chess Problem Database

Problem Display
PID: 168468 (n7/4K3/1N2P2p/2pp2p1/b2r1kB1/2Qp1P2/6R1/4N3 w - - 0 1)

Petite, Efren

2nd Comm., Schach-Echo, 1957

n7/4K3/1N2P2p/2pp2p1/b2r1kB1/2Qp1P2/6R1/4N3

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke3
      • 2.Qd2#
    • 1...Ke5
      • 2.Sxd3#
    • 1...Rb4
      • 2.Sxd5#
    • 1...Rc4
      • 2.Sxd5#
    • 1...Re4
      • 2.Sxd5#
    • 1...c4
      • 2.Qxd4#
  • Tries
    • 1.Kd6?
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Qd2#
      • 1...Re4
        • 2.Sxd5#
      • 1...d2!
    • 1.Kf6?
      • threat
        • 2.Qd2#
      • 1...Ke3
        • 2.Qd2#
      • 1...Re4
        • 2.Sxd5#
      • 1...d2!
    • 1.Sxd3+?
      • 1...Ke3
        • 2.Qd2#
      • 1...Rxd3!
  • Keys
    • 1.Qxc5!
      • threat
        • 2.Qxd4#
      • 1...Ke3
        • 2.Sxd5#
      • 1...Ke5
        • 2.Qd6#
      • 1...Rb4
        • 2.Sxd3#
      • 1...Rc4
        • 2.Sxd3#
      • 1...Re4
        • 2.Sxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINP(a),S_FLIGHT::QAB1(C)
    • K(d);P_SPINR(c),S_FLIGHT::S(A),XP(a)
    • R(c);N_GUARD::S(F),XP(f)
    • R(c);N_GUARD,P_PINP(G)::S(F),XP(f)
    • P(e);N_GUARD::QAR2(C),XR(c)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB(C)
      • Vars
        • K(d);P_SPINP(a),S_FLIGHT::QAB1(C)
        • R(c);N_GUARD::S(F),XP(f)
      • Refutation
        • P(a);
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB(C)
      • Vars
        • K(d);P_SPINP(a),S_FLIGHT::QAB1(C)
        • R(c);N_GUARD::S(F),XP(f)
      • Refutation
        • P(a);
    • Try
      • S(A);CHECK,XP(a)
      • Vars
        • K(d);S_FLIGHT::QAB1(C)
      • Refutation
        • R(c);XS(A)
  • Actual
    • Q(C);XP(e)
    • Threat
      • QAR2(C),XR(c)
    • Vars
      • K(d);P_SPINR(c),S_FLIGHT::S(F),XP(f)
      • K(d);P_SPINP(f),S_FLIGHT::QAB1(C)
      • R(c);N_GUARD::S(A),XP(a)
      • R(c);N_GUARD,P_PINP(G)::S(A),XP(a)
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).