MESON Chess Problem Database

Problem Display
PID: 182827 (7b/8/3np3/2nN2B1/1q1k4/1pRpN3/7Q/1K1R3B w - - 0 1)

Larrain, Santiago

2nd Prize, Belliboni-Faria Festival, 1989

7b/8/3np3/2nN2B1/1q1k4/1pRpN3/7Q/1K1R3B

#2

8 + 8

1077 Boletim da UBP 1990

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Rdxd3#
    • 1...Sce4
      • 2.Rdxd3#
    • 1...Sa6
      • 2.Rdxd3#
    • 1...Scb7
      • 2.Rdxd3#
    • 1...Sd7
      • 2.Rdxd3#
    • 1...b2
      • 2.Sc2#
    • 1...exd5
      • 2.Qxh8#
  • Tries
    • 1.Sf5+?
      • 1...exf5
        • 2.Be3#
        • 2.Qxh8#
      • 1...Sxf5!
    • 1.Bf6+?
      • 1...e5
        • 2.Qxe5#
      • 1...Bxf6!
    • 1.Qf4+?
      • 1...Sce4
        • 2.Rdxd3#
      • 1...Sde4!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se2#
      • 1...Kxc3
        • 2.Qb2#
      • 1...Kxe3
        • 2.Qg1#
      • 1...Ke5
        • 2.Qxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • S(e);N_GUARD::R1(B),XP(b)
    • P(a);N_GUARD::S(F)
    • P(g);N_GUARD,XS(G)::QAB(D),XB(h)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • S(f);XS(F)
    • Try
      • B(H);CHECK
      • Vars
        • P(g);::QAB1(D),XP(g)
      • Refutation
        • B(h);XB(H)
    • Try
      • Q(D);CHECK
      • Vars
        • S(e);P_SPINS(e)::R1(B),XP(b)
      • Refutation
        • S(f);P_SPINS(f)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);N_SPINP(b),OGATEB,S_FLIGHT,XR(E)::QAB1(D)
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB(D)
      • K(d);N_SPINP(b),S_FLIGHT::QAB(D),XB(h)
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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).