MESON Chess Problem Database

Problem Display
PID: 138902 (8/2p5/4b3/rQ4Pn/1RN1kPp1/p7/K1P1NPP1/8 w - - 0 1)

Boorer, PA

The Problemist, 1936

8/2p5/4b3/rQ4Pn/1RN1kPp1/p7/K1P1NPP1/8

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qe5#
    • 1...Ra6
      • 2.Qe5#
    • 1...Ra7
      • 2.Qe5#
    • 1...Ra8
      • 2.Qe5#
    • 1...Bxc4+
      • 2.Rxc4#
    • 1...Bf5
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sxa3#
      • 2.Se3#
      • 2.Sxa5#
      • 2.Se5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Bd7
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sxa3#
      • 2.Se3#
      • 2.Sxa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...Bc8
      • 2.Sb2#
      • 2.Sd2#
      • 2.Sxa3#
      • 2.Se3#
      • 2.Sxa5#
      • 2.Sb6#
      • 2.Sd6#
    • 1...g3
      • 2.f3#
  • Tries
    • 1.Qc6+?
      • 1...Rd5
        • 2.Se3#
        • 2.Sd6#
      • 1...Bd5
        • 2.Qg6#
      • 1...Kf5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd3#
      • 1...Bxc4+
        • 2.Rxc4#
      • 1...Kf5
        • 2.Qd3#
        • 2.Qh7#
      • 1...Bxd7
        • 2.Se3#
      • 1...Sxf4
        • 2.Sg3#
      • 1...Rd5
        • 2.Sd6#
      • 1...Bd5
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(d);N_GUARD::QAR1(I)
    • B(f);CHECK,OGATE,P_SPINB(f),XS(G)::R(F),XB(f)
    • P(c);N_GUARD::P(D)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • B(f);OGATE,P_SPINB(f),SBLOCK::QAB(I)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • B(f);CHECK,OGATE,P_SPINB(f),XS(G)::R(F),XB(f)
      • B(f);N_PINS(G),XQ(I)::R(F)+S(G)
      • S(e);N_GUARD,SBLOCK,XP(H)::S(C)
      • R(d);N_PINS(G),SBLOCK::R(F)+S(G),DCHECK
      • B(f);N_GUARD,SBLOCK,S_CUTR(d)::QAB(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).