MESON Chess Problem Database

Problem Display
PID: 146164 (nR5B/2p2p1B/K1N3qr/3P3b/2p2N2/p4Q2/2k4n/3R3r w - - 0 1)

Boorer, PA

British Chess Magazine, 1940

nR5B/2p2p1B/K1N3qr/3P3b/2p2N2/p4Q2/2k4n/3R3r

#2

9 + 11

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Bxe4#
    • 1...Qf5
      • 2.Bxf5#
    • 1...Rxd1
      • 2.Qc3#
    • 1...Sg4
      • 2.Qe2#
    • 1...Sb6
      • 2.Sb4#
    • 1...a2
      • 2.Rb2#
    • 1...f6
      • 2.Sd4#
  • Tries
    • 1.Bxg6+?
      • 1...Bxg6
        • 2.Sb4#
        • 2.Sd4#
        • 2.Qe2#
      • 1...fxg6
        • 2.Sb4#
        • 2.Sd4#
      • 1...f5
        • 2.Sb4#
        • 2.Sd4#
        • 2.Bxf5#
      • 1...Rxg6!
    • 1.Qg2+?
      • 1...Be2
        • 2.Qxe2#
      • 1...Kxd1!
    • 1.Qf2+?
      • 1...Be2
        • 2.Qxe2#
      • 1...Kxd1!
  • Keys
    • 1.Sg2!
      • threat
        • 2.Se3#
      • 1...Rxd1
        • 2.Qc3#
      • 1...Re1
        • 2.Sxe1#
      • 1...Sf1
        • 2.Se1#
      • 1...Sg4
        • 2.Qe2#
      • 1...Sb6
        • 2.Sb4#
      • 1...f6
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(g);OGATE::B(G),XQ(g)
    • R(a);SBLOCK,XR(A)::QAR1(B)
    • S(c);S_CUTB(f)::QAR2(B)
    • S(k);N_PINS(F)::S(F)
    • P(d);N_GUARD::R1(H)
    • P(j);N_PINS(F)::S(F)
  • Tries
    • Try
      • B(G);CHECK,N_SPINS(F),XQ(g)
      • Refutation
        • R(h);P_PINS(F),XB(G)
    • Try
      • Q(B);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR2(B),XB(f)
      • Refutation
        • K(b);N_SPINQ(g),S_FLIGHT,XR(A)
    • Try
      • Q(B);CHECK
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR2(B),XB(f)
      • Refutation
        • K(b);N_SPINQ(g),S_FLIGHT,XR(A)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • R(a);SBLOCK,XR(A)::QAR1(B)
      • R(a);N_GUARD::S(C),XR(a)
      • S(c);S_CUTR(a)::S(C)
      • S(c);S_CUTB(f)::QAR2(B)
      • S(k);N_PINS(F)::S(F)
      • P(j);N_PINS(F)::S(F)
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).