MESON Chess Problem Database

Problem Display
PID: 263910 (1Q2n3/1bb1n2B/2p5/r4P2/p2Pk1N1/4NpP1/2RK1P2/B3Rr2 w - - 0 1)

Parcerisa, Jose Antonio Lopez

Coello-75 JT (Problemas), 2017

1Q2n3/1bb1n2B/2p5/r4P2/p2Pk1N1/4NpP1/2RK1P2/B3Rr2

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf2+
      • 2.Sxf2#
    • 1...Rd5
      • 2.Sxf1#
    • 1...Bf4
      • 2.Qxf4#
    • 1...Bb6
      • 2.Qf4#
    • 1...Bd8
      • 2.Qf4#
    • 1...Sd5
      • 2.f6#
    • 1...Sd6
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
    • 1...Sg7
      • 2.Sf6#
  • Tries
    • 1.Qxc7?
      • threat
        • 2.Qf4#
      • 1...Rxf2+
        • 2.Sxf2#
      • 1...Sxc7
        • 2.Sf6#
      • 1...Re5
        • 2.Qxe5#
      • 1...Sd5
        • 2.Qe5#
        • 2.f6#
      • 1...Sd6
        • 2.Sf6#
      • 1...Sg6!
  • Keys
    • 1.Rc4!
      • threat
        • 2.d5#
      • 1...Rxf2+
        • 2.Sxf2#
      • 1...Rc5
        • 2.dxc5#
      • 1...Rd5
        • 2.Sxf1#
      • 1...Ba6
        • 2.Qb1#
      • 1...Be5
        • 2.dxe5#
      • 1...Bb6
        • 2.Qf4#
      • 1...Sd5
        • 2.f6#
      • 1...Sd6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(a);CHECK,XP(E)::S(I),XR(a)
    • R(e);P_PINP(H),SBLOCK::R(B)+S(F),XR(a)
    • B(h);OGATE,P_PINS(F)::QAR1(L),XB(h)
    • B(h);OGATE::QAR1(L)
    • S(i);N_GUARD,S_CUTR(e)::B(K)+P(J)
    • S(j);N_GUARD::S(I)
    • S(j);N_GUARD::S(I),XS(j)
  • Tries
    • Try
      • Q(L);XB(h)
      • Threat
        • QAR1(L)
      • Vars
        • R(a);CHECK,XP(E)::S(I),XR(a)
        • S(j);N_GUARD,XQ(L)::S(I)
        • R(e);N_GUARD::QAR1(L),XR(e)
        • S(j);N_GUARD::S(I)
      • Refutation
        • S(i);
  • Actual
    • R(C);
    • Threat
      • R(C)+P(H)
    • Vars
      • R(a);CHECK,XP(E)::S(I),XR(a)
      • R(e);OGATE::R(C)+P(H),XR(e)
      • R(e);P_PINP(H),SBLOCK::R(B)+S(F),XR(a)
      • B(g);OGATE::QAB(L)
      • B(h);OGATE::R(C)+P(H),XB(h)
      • B(h);OGATE::QAR1(L)
      • S(i);N_GUARD,S_CUTR(e)::B(K)+P(J)
      • S(j);N_GUARD::S(I)
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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).