MESON Chess Problem Database

Problem Display
PID: 192946 (2r4B/R4Pq1/8/8/8/PQbNnP2/4KP2/k4NR1 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2019

2r4B/R4Pq1/8/8/8/PQbNnP2/4KP2/k4NR1

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Sxe3#
    • 1...Qf8
      • 2.Sxe3#
    • 1...Qxf7
      • 2.Sxe3#
    • 1...Qh7
      • 2.Sxe3#
    • 1...Bb4
      • 2.axb4#
    • 1...Sg4
      • 2.Sd2#
  • Tries
    • 1.Sd2+?
      • 1...Sd1
        • 2.Rxd1#
        • 2.Qb1#
      • 1...Sf1
        • 2.Rxf1#
        • 2.Qb1#
      • 1...Qxg1!
    • 1.Sxe3+?
      • 1...Qxg1
        • 2.Sc2#
      • 1...Be1!
  • Keys
    • 1.Sb4!
      • threat
        • 2.Qa2#
      • 1...Qxf7
        • 2.Sxe3#
      • 1...Bxb4
        • 2.axb4#

This is a version of 192945

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(d);N_GUARD,P_SPINB(b)::R(B)+S(A),XS(c)
    • Q(d);N_GUARD,P_SPINB(b),XP(J)::R(B)+S(A),XS(c)
    • B(b);OGATE,P_SPINQ(d)::R(I)+P(E),XB(b)
    • S(c);N_GUARD,S_CUTQ(d)::R(B)+S(A)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • Q(d);P_SPINB(b),XR(B)
    • Try
      • S(A);CHECK,XS(c)
      • Vars
        • Q(d);P_SPINB(b),XR(B)::S(A)
      • Refutation
        • B(b);P_SPINB(b),P_SPINQ(d)
  • Actual
    • S(G);
    • Threat
      • QAR1(F)
    • Vars
      • Q(d);N_GUARD,P_SPINB(b),XP(J)::R(B)+S(A),XS(c)
      • B(b);OGATE,P_SPINQ(d),XS(G)::R(I)+P(E),XB(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).