MESON Chess Problem Database

Problem Display
PID: 102475 (2n5/1pP4R/1Qq1kNP1/1r3p2/5P1B/1b2pN2/B7/3R3K w - - 0 1)

Boyer, Jean-Pierre

1st Comm., Pelle MT, 1966-1967

2n5/1pP4R/1Qq1kNP1/1r3p2/5P1B/1b2pN2/B7/3R3K

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sd4#
  • Tries
    • 1.Qxe3+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Qe4!
    • 1.Qxc6+?
      • 1...Sd6
        • 2.Sd4#
        • 2.Rxd6#
        • 2.Qd7#
        • 2.Qxd6#
        • 2.c8Q#
        • 2.c8B#
      • 1...bxc6!
  • Keys
    • 1.Se8!
      • threat
        • 2.Sg7#
      • 1...Qd6
        • 2.Sg5#
      • 1...Rd5
        • 2.Sg5#
      • 1...Bd5
        • 2.Qxe3#
      • 1...Sd6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(e);N_PINS(D)::S(D)
  • Tries
    • Try
      • Q(G);CHECK,N_PINQ(e),XP(b)
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(G),XR(c)
      • Refutation
        • Q(e);P_SPINQ(e)
    • Try
      • Q(G);CHECK,N_SPINS(D),XQ(e)
      • Refutation
        • P(g);XQ(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • Q(e);N_PINS(D)::S(D)
      • R(c);N_PINS(D),N_SPINB(a)::S(D)
      • B(a);S_CUTR(c)::QAR(G),XP(b)
      • S(h);N_GUARD,N_SPINQ(e)::R1(K)
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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).