MESON Chess Problem Database

Problem Display
PID: 259787 (3n3n/4K3/4b1p1/2p1kpp1/1Np1p1PN/2P4Q/4P2P/B3RR2 w - - 0 1)

Parcerisa, Jose Antonio Lopez

Tolosa-100 MT (Problemas), 2016

3n3n/4K3/4b1p1/2p1kpp1/1Np1p1PN/2P4Q/4P2P/B3RR2

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sf7
      • 2.Sxg6#
    • 1...e3
      • 2.Qxe3#
    • 1...fxg4
      • 2.Qg3#
  • Tries
    • 1.Sf3+?
      • 1...Kf4
        • 2.e3#
      • 1...exf3!
    • 1.Rxf5+?
      • 1...Bxf5
        • 2.Qg3#
      • 1...gxf5!
    • 1.Qe3?
      • threat
        • 2.Sf3#
      • 1...cxb4
        • 2.Qd4#
      • 1...fxg4
        • 2.Qg3#
      • 1...gxh4
        • 2.Qf4#
      • 1...Sc6+!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qd6#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...cxd3
        • 2.c4#
      • 1...exd3
        • 2.exd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sb7
        • 2.Sc6#
      • 1...Sdf7
        • 2.Sc6#
      • 1...Shf7
        • 2.Sxg6#
      • 1...e3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(j);N_GUARD::S(J),XP(h)
    • P(b);OGATEB::QAR2(G),XP(b)
    • P(e);N_GUARD,XP(I)::QAB(G)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • K(d);S_CUTP(b),S_FLIGHT::P(D)
      • Refutation
        • P(b);XS(J)
    • Try
      • R(C);CHECK,XP(e)
      • Vars
        • B(g);XR(C)::QAB(G)
      • Refutation
        • P(h);XR(C)
    • Try
      • Q(G);P_PINP(b)
      • Threat
        • S(J)
      • Vars
        • P(c);N_GUARD,XS(H)::QAB1(G)
        • P(e);N_GUARD,XP(I)::QAB(G)
        • P(f);N_GUARD,XS(J)::QAB1(G)
      • Refutation
        • S(i);CHECK
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(i);CHECK,N_GUARD::S(H),XS(i)
      • P(a);OGATE,XQ(G)::B(A)+P(F)
      • P(b);OGATE,XQ(G)::R(B)+P(D),XP(b)
      • B(g);N_GUARD::QAR1(G),XB(g)
      • S(i);N_GUARD::S(H)
      • S(j);N_GUARD::S(J),XP(h)
      • P(b);OGATEB::QAR2(G),XP(b)
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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).