MESON Chess Problem Database

Problem Display
PID: 11319 (3R2n1/rr1n1QP1/2p1K1p1/1p6/1B1k1N2/bR3P1p/3PB2q/8 w - - 0 1)

Boorer, PA

Chess, 1938

3R2n1/rr1n1QP1/2p1K1p1/1p6/1B1k1N2/bR3P1p/3PB2q/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxf4#
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sh6
      • 2.Qf6#
    • 1...Se7
      • 2.Qf6#
    • 1...c5
      • 2.Bc3#
  • Tries
    • 1.Qf8?
      • threat
        • 2.Bc3#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Qxf4
        • 2.Bc3#
        • 2.Qc5#
        • 2.Qxf4#
      • 1...Bxb4
        • 2.Rxb4#
        • 2.Qxb4#
      • 1...Bb2
        • 2.Bc5#
        • 2.Qc5#
        • 2.Qd6#
      • 1...Sf6
        • 2.Bc3#
        • 2.Qc5#
        • 2.Qxf6#
      • 1...Se7
        • 2.Qf6#
      • 1...c5
        • 2.Bc3#
        • 2.Qxc5#
        • 2.Qd6#
      • 1...Qxe2+!
  • Keys
    • 1.Kd6!
      • threat
        • 2.Rd3#
      • 1...Qxf4+
        • 2.Qxf4#
      • 1...Bxb4+
        • 2.Rxb4#
      • 1...Qxe2
        • 2.Sxe2#
      • 1...Sc5
        • 2.Bc3#
      • 1...Se5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • Q(a);OGATE,XS(F)::QAR2(H),XQ(a)
    • S(k);N_GUARD::QAB(H),XS(k)
    • S(k);N_GUARD::QAB(H)
    • P(f);SBLOCK::B(E)
  • Tries
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(k);N_GUARD::QAB(H)
      • Refutation
        • Q(a);CHECK,XB(B)
  • Actual
    • K(G);N_PINS(j),P-FLIGHT,P_SPINB(E),P_SPINS(F)
    • Threat
      • R1(C)
    • Vars
      • Q(a);CHECK,OGATE,XS(F)::QAR2(H),XQ(a)
      • B(b);CHECK,OGATE,XB(E)::R(C),XB(b)
      • Q(a);N_PINS(F),XB(B)::S(F),XQ(a)
      • S(j);N_PINB(E)::B(E)
      • S(j);N_PINS(F)::S(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).