MESON Chess Problem Database

Problem Display
PID: 109903 (b2R4/5K2/4Pp2/2p1k3/1P2N2B/6bN/2QPP3/6q1 w - - 0 1)

Cotrin, John R

Caissa, 1980

b2R4/5K2/4Pp2/2p1k3/1P2N2B/6bN/2QPP3/6q1

#2

10 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Bf6#
  • Tries
    • 1.Sxg3?
      • threat
        • 2.Bxf6#
        • 2.Qf5#
      • 1...Qxg3
        • 2.Bxg3#
        • 2.Bxf6#
      • 1...Bd5
        • 2.Bxf6#
      • 1...Qb1
        • 2.Bxf6#
        • 2.Qc3#
      • 1...Qf1
        • 2.Qb2#
        • 2.Qc3#
      • 1...Be4
        • 2.Bxf6#
        • 2.Qxe4#
      • 1...f5
        • 2.Bf6#
        • 2.Qxf5#
      • 1...Qf2!
    • 1.Qxc5+?
      • 1...Kxe4
        • 2.d3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Qxc5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sc4#
      • 1...Kd4
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qe4#
      • 1...Qd4
        • 2.Qf5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bd5
        • 2.Bxf6#
      • 1...c4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • P(e);SBLOCK::B(G)
  • Tries
    • Try
      • S(F);XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);P_PINP(H)::B(G),XP(e)
      • Refutation
        • Q(a);
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT,XS(F)::P(B)
        • B(f);N_GUARD,P_PINP(H),P_SPINB(f)::QAR1(A),XB(f)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);S_FLIGHT::QAB1(A),XP(c)
      • K(d);P-FLIGHT::QAB1(A)
      • Q(a);SBLOCK::QAR1(A)
      • B(f);N_GUARD::QAR1(A),XB(f)
      • B(f);P_PINP(H),SBLOCK::B(G),XP(e)
      • P(c);::S(F),XP(c)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).