MESON Chess Problem Database

Problem Display
PID: 230256 (2KR3b/P2BB2N/p1p3p1/3kP2Q/r5R1/1P2P1nP/4NP2/q7 w - - 0 1)

Coello Alonso, Jose Antonio

Uris, Miguel

BCPS Website, 2021

2KR3b/P2BB2N/p1p3p1/3kP2Q/r5R1/1P2P1nP/4NP2/q7

#2

14 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Sxc3#
    • 1...Qxe5
      • 2.Sc3#
    • 1...Qb1
      • 2.Sc3#
    • 1...Qd1
      • 2.Sc3#
    • 1...Qf1
      • 2.Sc3#
    • 1...Qg1
      • 2.Sc3#
    • 1...Qh1
      • 2.Sc3#
    • 1...Qa2
      • 2.Sc3#
    • 1...Qa3
      • 2.Sc3#
    • 1...Rc4
      • 2.bxc4#
    • 1...Bxe5
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Se4
      • 2.Sf4#
    • 1...c5
      • 2.a8Q#
      • 2.a8B#
  • Tries
    • 1.Sf4+?
      • 1...Ke4
        • 2.Bxc6#
      • 1...Rxf4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Bf5#
      • 1...Kxe4
        • 2.Bxc6#
      • 1...Qxe5
        • 2.Sc3#
      • 1...Rxe4
        • 2.Bg4#
      • 1...Bxe5
        • 2.Sf6#
      • 1...Sxe4
        • 2.Sf4#
      • 1...Qa3
        • 2.Sc3#
      • 1...Sf5
        • 2.Bxf5#
      • 1...c5
        • 2.a8Q#
        • 2.a8B#

This is a version of 221523

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::S(A),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
    • Q(a);N_GUARD::S(A)
    • R(c);OGATE::P(C),XR(c)
    • B(h);N_GUARD,P_SPINB(h),XP(G)::S(L)
    • B(h);N_GUARD::S(L),XB(h)
    • S(b);SBLOCK,S_CUTR(c)::S(A)
    • P(f);::P=Q
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);S_FLIGHT::B(J),XP(f)
      • Refutation
        • R(c);XS(A)
  • Actual
    • R(F);
    • Threat
      • R(N)+B(J)
    • Vars
      • K(d);S_FLIGHT,XR(F)::B(J),XP(f)
      • Q(a);N_GUARD,P_SPINQ(a),XP(G)::S(A)
      • R(c);SBLOCK,XR(F)::R(N)+B(J)
      • B(h);N_GUARD,P_SPINB(h),XP(G)::S(L)
      • S(b);SBLOCK,XR(F)::S(A)
      • Q(a);N_GUARD::S(A)
      • S(b);::R(N)+B(J),XS(b)
      • P(f);::P=Q
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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).