MESON Chess Problem Database

Problem Display
PID: 148753 (8/5pB1/3R3n/K1p5/4k1p1/1p2p3/1p1p4/1NqQ1R2 w - - 0 1)

Williams, Philip Hamilton

British Chess Magazine, 1902

8/5pB1/3R3n/K1p5/4k1p1/1p2p3/1p1p4/1NqQ1R2

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb1
      • 2.Qxb1#
    • 1...Qxd1
      • 2.Sc3#
    • 1...Qc3+
      • 2.Sxc3#
    • 1...Sf5
      • 2.Qxg4#
    • 1...Sg8
      • 2.Qxg4#
    • 1...e2
      • 2.Qxe2#
    • 1...g3
      • 2.Qf3#
    • 1...c4
      • 2.Rd4#
  • Tries
    • 1.Sxd2+?
      • 1...exd2
        • 2.Qe2#
      • 1...Qxd2+!
    • 1.Qc2+?
      • 1...bxc2
        • 2.Sc3#
      • 1...Qxc2!
  • Keys
    • 1.Rxf7!
      • 1...Qc3+
        • 2.Sxc3#
      • 1...Qxb1
        • 2.Qxb1#
      • 1...Qxd1
        • 2.Sc3#
      • 1...Sxf7
        • 2.Qxg4#
      • 1...Sf5
        • 2.Qxg4#
      • 1...e2
        • 2.Qxe2#
      • 1...Qc2
        • 2.Qh1#
      • 1...Qc4
        • 2.Qh1#
      • 1...Sg8
        • 2.Qxg4#
      • 1...g3
        • 2.Qf3#
      • 1...c4
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(a);OGATE,XS(A)::QAB(B),XQ(a)
    • Q(a);N_GUARD,XQ(B)::S(A)
    • Q(a);CHECK,N_GUARD::S(A),XQ(a)
    • S(i);N_GUARD::QAR2(B),XP(g)
    • P(e);OGATEB::QAR2(B),XP(e)
    • P(g);N_GUARD::QAB1(B)
    • P(h);N_GUARD::R1(E)
  • Tries
    • Try
      • S(A);CHECK,XP(c)
      • Vars
        • P(e);S_CUTQ(a),XS(A)::QAR2(B)
      • Refutation
        • Q(a);CHECK,XS(A)
    • Try
      • Q(B);CHECK
      • Vars
        • P(d);XQ(B)::S(A)
      • Refutation
        • Q(a);XQ(B)
  • Actual
    • R(C);XP(j)
    • Vars
      • Q(a);CHECK,N_GUARD::S(A),XQ(a)
      • Q(a);OGATE,XS(A)::QAB(B),XQ(a)
      • Q(a);N_GUARD,XQ(B)::S(A)
      • S(i);N_GUARD,XR(C)::QAR2(B),XP(g)
      • S(i);N_GUARD::QAR2(B),XP(g)
      • P(e);OGATEB::QAR2(B),XP(e)
      • Q(a);N_GUARD::QAB(B)
      • P(g);N_GUARD::QAB1(B)
      • P(h);N_GUARD::R1(E)
HTML5 logo

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).