MESON Chess Problem Database

Problem Display
PID: 67691 (b2k1K2/5Rp1/N1p1B1Pn/n3N3/2p5/1pB1p3/r7/4b2Q w - - 0 1)

Kipping, Cyril Stanley

Vaughan, Colin V

Chess, 1948

b2k1K2/5Rp1/N1p1B1Pn/n3N3/2p5/1pB1p3/r7/4b2Q

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd2
      • 2.Bxa5#
    • 1...Bd2
      • 2.Qh4#
    • 1...Bxc3
      • 2.Qh4#
    • 1...Bh4
      • 2.Qxh4#
    • 1...Sb7
      • 2.Sxc6#
    • 1...Sxf7
      • 2.Sxf7#
    • 1...c5
      • 2.Qxa8#
  • Tries
    • 1.Sxc6+?
      • 1...Sxc6
        • 2.Qd5#
      • 1...Bxc6!
    • 1.Bd4?
      • threat
        • 2.Bb6#
      • 1...c5
        • 2.Qxa8#
      • 1...Bb4+!
    • 1.Bxa5+?
      • 1...Bxa5
        • 2.Qh4#
      • 1...Rxa5!
    • 1.Qe4?
      • threat
        • 2.Qd4#
      • 1...Bxc3
        • 2.Qh4#
      • 1...Sxf7
        • 2.Sxf7#
      • 1...Rd2
        • 2.Bxa5#
      • 1...Sb7
        • 2.Sxc6#
      • 1...c5
        • 2.Qxa8#
      • 1...Sf5!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rd4#
      • 1...Bxc3
        • 2.Qh4#
      • 1...Rd2
        • 2.Bxa5#
      • 1...Rf2
        • 2.Qh4#
      • 1...Sb7
        • 2.Sxc6#
      • 1...Sf5
        • 2.Sf7#
      • 1...Sf7
        • 2.Sxf7#
      • 1...c5
        • 2.Qxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(b);N_GUARD,S_CUTB(a)::B(B),XS(f)
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD,XB(B)::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • S(f);N_GUARD,S_CUTB(j)::S(C),XP(g)
    • S(h);XR(G)::S(C),XS(h)
    • P(g);OGATE::QAR(A),XB(j)
  • Tries
    • Try
      • S(C);CHECK,XP(g)
      • Vars
        • S(f);XS(C)::QAR(A)
      • Refutation
        • B(j);XS(C)
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • P(g);OGATE::QAR(A),XB(j)
      • Refutation
        • B(a);CHECK
    • Try
      • B(B);CHECK,XS(f)
      • Vars
        • B(a);XB(B)::QAB(A)
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • B(a);N_GUARD,XB(B)::QAB(A)
        • S(h);XR(G)::S(C),XS(h)
        • R(b);N_GUARD,S_CUTB(a)::B(B),XS(f)
        • S(f);N_GUARD,S_CUTB(j)::S(C),XP(g)
        • P(g);OGATE::QAR(A),XB(j)
      • Refutation
        • S(h);
  • Actual
    • R(G);
    • Threat
      • R(G)
    • Vars
      • B(a);N_GUARD,XB(B)::QAB(A)
      • R(b);N_GUARD,S_CUTB(a)::B(B),XS(f)
      • R(b);P_PINR(G),S_CUTB(a)::QAB(A)
      • S(f);N_GUARD,S_CUTB(j)::S(C),XP(g)
      • S(h);N_GUARD::S(C)
      • S(h);N_GUARD::S(C),XS(h)
      • P(g);OGATE::QAR(A),XB(j)
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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).