MESON Chess Problem Database

Problem Display
PID: 9745 (1B1n4/1p6/N5R1/1B1k2rp/r1p5/p1P5/K3P2n/1Q5b w - - 0 1)

Chandler, Guy Wills

1st Prize, Four-Leaved Shamrock, 1909

1B1n4/1p6/N5R1/1B1k2rp/r1p5/p1P5/K3P2n/1Q5b

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qf5#
    • 1...Rg2
      • 2.Qf5#
    • 1...Rg3
      • 2.Qf5#
    • 1...Rg4
      • 2.Qf5#
    • 1...Re5
      • 2.Rd6#
    • 1...Rf5
      • 2.Qxf5#
    • 1...Rxg6
      • 2.Qf5#
    • 1...Sf3
      • 2.e4#
    • 1...Sg4
      • 2.Qxh1#
  • Tries
    • 1.Bxc4+?
      • 1...Kxc4
        • 2.Qd3#
        • 2.Qb3#
      • 1...Rxc4!
    • 1.Qxh1+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Rg2!
  • Keys
    • 1.Bd7!
      • threat
        • 2.Rxg5#
      • 1...Rxg6
        • 2.Qf5#
      • 1...Rg1
        • 2.Qf5#
      • 1...Rg2
        • 2.Qf5#
      • 1...Rg3
        • 2.Qf5#
      • 1...Rg4
        • 2.Qf5#
      • 1...Re5
        • 2.Rd6#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Be4
        • 2.Qb5#
      • 1...Sf3
        • 2.e4#
      • 1...Sg4
        • 2.Qxh1#
      • 1...Sc6
        • 2.Be6#
      • 1...Se6
        • 2.Qxb7#
      • 1...Sf7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD::QAR2(A)
    • R(g);N_GUARD,P_PINP(C)::QAR2(A)
    • R(g);SBLOCK::R1(G)
    • R(g);N_GUARD::QAR2(A),XR(g)
    • R(g);N_GUARD,XR(G)::QAR2(A)
    • S(b);S_CUTB(a)::P(C)
    • S(b);N_GUARD,S_CUTR(g)::QAB(A),XB(a)
  • Tries
    • Try
      • B(E);CHECK,XP(e)
      • Refutation
        • R(d);XB(E)
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(A),XS(b)
      • Refutation
        • R(g);P_PINP(C),P_SPINR(g)
  • Actual
    • B(E);
    • Threat
      • R(G),XR(g)
    • Vars
      • R(g);N_GUARD,XR(G)::QAR2(A)
      • R(g);N_GUARD::QAR2(A)
      • R(g);N_GUARD,P_PINP(C)::QAR2(A)
      • R(g);SBLOCK::R1(G)
      • R(g);N_GUARD::QAR2(A),XR(g)
      • B(a);SBLOCK::QAR2(A)
      • S(b);S_CUTB(a)::P(C)
      • S(b);N_GUARD,S_CUTR(g)::QAB(A),XB(a)
      • S(j);N_GUARD,SBLOCK::B(E)
      • S(j);N_GUARD::QAB(A),XP(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).