MESON Chess Problem Database

Problem Display
PID: 226425 (b1B1KR2/2QNb3/r4p2/p4N1P/1pP1krp1/q4p2/2P2p2/B7 w - - 0 1)

Chisholm, William S

US Problem Bulletin, 1981

b1B1KR2/2QNb3/r4p2/p4N1P/1pP1krp1/q4p2/2P2p2/B7

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf5
      • 2.Qe5#
    • 1...Qe3
      • 2.Sg3#
    • 1...Rd6
      • 2.Sc5#
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bd6
      • 2.Sxf6#
    • 1...Bd8
      • 2.Sc5#
  • Tries
    • 1.Sxf6+?
      • 1...Rxf6
        • 2.Qe5#
      • 1...Bxf6!
    • 1.Qc5?
      • threat
        • 2.Sg3#
      • 1...Rxf5
        • 2.Qd4#
      • 1...Bxc5
        • 2.Sxc5#
      • 1...g3
        • 2.Sxg3#
      • 1...f1S!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Sc5#
      • 1...Kxf5
        • 2.Qe5#
      • 1...Rxf5
        • 2.Qd4#
      • 1...Bxd6
        • 2.Sxf6#
      • 1...Qe3
        • 2.Sg3#
      • 1...Qa4
        • 2.Qd3#
      • 1...Rc6
        • 2.Qd5#
      • 1...Bc6
        • 2.Qe6#
      • 1...b3
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • K(e);P_SPINP(j),S_FLIGHT,XS(D)::QAR1(F)
    • Q(b);SBLOCK::S(D)
    • R(i);S_CUTB(k)::S(G)
    • B(k);N_GUARD::S(G),XB(k)
    • B(k);N_GUARD,S_CUTR(i)::S(G),XP(j)
    • B(k);N_GUARD::S(G)
  • Tries
    • Try
      • S(G);CHECK,XP(j)
      • Vars
        • R(i);XS(G)::QAR1(F)
      • Refutation
        • B(k);XS(G)
    • Try
      • Q(F);
      • Threat
        • S(D)
      • Vars
        • R(f);SBLOCK,XS(D)::QAR1(F)
        • B(k);XQ(F)::S(G),XB(k)
        • P(g);::S(D),XP(g)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Threat
      • S(G)
    • Vars
      • K(e);P_SPINP(j),S_FLIGHT,XS(D)::QAR1(F)
      • R(f);SBLOCK,XS(D)::QAR1(F)
      • B(k);N_GUARD,XQ(F)::S(G),XP(j)
      • Q(b);SBLOCK::S(D)
      • Q(b);N_GUARD,P_PINS(G)::QAB1(F)
      • R(i);S_CUTB(l)::QAB1(F)
      • B(l);P_PINS(G),S_CUTR(i)::QAR2(F)
      • P(d);S_CUTQ(b)::QAB1(F)
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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).