MESON Chess Problem Database

Problem Display
PID: 61850 (4bqr1/N2p2b1/1Bp5/2p2p2/3k1P1Q/3Pp1N1/B3P3/2R3K1 w - - 0 1)

Poisson, Christian

Comm., diagrammes, 1987

4bqr1/N2p2b1/1Bp5/2p2p2/3k1P1Q/3Pp1N1/B3P3/2R3K1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Sxf5#
    • 1...Qe7
      • 2.Sxf5#
    • 1...Qf6
      • 2.Bxc5#
    • 1...Qf7
      • 2.Bxc5#
    • 1...Bf7
      • 2.Sxf5#
  • Tries
    • 1.Qf6+?
      • 1...Qxf6
        • 2.Bxc5#
      • 1...Bxf6!
    • 1.Qe7?
      • threat
        • 2.Bxc5#
      • 1...Qxe7
        • 2.Sxf5#
      • 1...d6!
    • 1.Qh1?
      • threat
        • 2.Rc4#
      • 1...Qf7
        • 2.Bxc5#
      • 1...Bf7
        • 2.Sxf5#
      • 1...d5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Sxc6#
      • 1...Qd6
        • 2.Sxf5#
      • 1...Qf6
        • 2.Bxc5#
      • 1...d5
        • 2.Rc4#
      • 1...d6
        • 2.Bxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(i);N_GUARD::S(F),XP(d)
    • Q(i);N_GUARD::B(I),XP(c)
    • B(h);S_CUTQ(i)::S(F),XP(d)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • Q(i);XQ(H)::B(I),XP(c)
      • Refutation
        • B(g);P_PINS(F),XQ(H)
    • Try
      • Q(H);
      • Threat
        • B(I),XP(c)
      • Vars
        • Q(i);N_GUARD,XQ(H)::S(F),XP(d)
      • Refutation
        • P(f);
    • Try
      • Q(H);
      • Threat
        • R1(A)
      • Vars
        • Q(i);N_GUARD::B(I),XP(c)
        • B(h);S_CUTQ(i)::S(F),XP(d)
      • Refutation
        • P(f);
  • Actual
    • Q(H);
    • Threat
      • S(J),XP(e)
    • Vars
      • Q(i);N_GUARD::S(F),XP(d)
      • Q(i);N_GUARD::B(I),XP(c)
      • P(f);::R1(A)
      • P(f);S_CUTQ(i)::B(I),XP(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).