MESON Chess Problem Database

Problem Display
PID: 146658 (4r3/3B2p1/1pR5/N2kP2R/1r6/5P2/1qPPN2b/3Q3K w - - 0 1)

Petite, Efren

Chess, 1955

4r3/3B2p1/1pR5/N2kP2R/1r6/5P2/1qPPN2b/3Q3K

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.c4#
    • 1...Rb5
      • 2.c4#
    • 1...Rxe5
      • 2.Be6#
    • 1...Re6
      • 2.Bxe6#
    • 1...Ra8
      • 2.Be6#
    • 1...Rb8
      • 2.Be6#
    • 1...Rc8
      • 2.Be6#
    • 1...Rd8
      • 2.Be6#
    • 1...Rf8
      • 2.Be6#
    • 1...Rg8
      • 2.Be6#
    • 1...Rh8
      • 2.Be6#
  • Keys
    • 1.d4!
      • threat
        • 2.Rd6#
      • 1...Qxd4
        • 2.Sc3#
      • 1...Rxd4
        • 2.c4#
      • 1...Rxe5
        • 2.Be6#
      • 1...Bxe5
        • 2.Sf4#
      • 1...bxa5
        • 2.Rc5#
      • 1...Re6
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD::P(C)
    • R(g);N_GUARD,P_SPINR(g),XP(H)::B(K)
    • R(g);N_GUARD::B(K),XR(g)
    • R(g);N_GUARD::B(K)
  • Actual
    • P(D);
    • Threat
      • R1(J)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XP(D)::S(E)
      • R(c);N_GUARD,P_SPINR(c),XP(D)::P(C)
      • R(g);N_GUARD,P_SPINR(g),XP(H)::B(K)
      • B(b);N_GUARD,P_SPINB(b),XP(H)::S(E)
      • P(e);N_GUARD,XS(G)::R1(J)
      • R(g);N_GUARD::B(K),XR(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).