MESON Chess Problem Database

Problem Display
PID: 101314 (1b5B/r2pQ3/p7/N2k4/8/1P2RP2/p6r/Kb6 w - - 0 1)

Beach, Lennox F

Good Companions, 1918

1b5B/r2pQ3/p7/N2k4/8/1P2RP2/p6r/Kb6

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Rd3#
    • 1...Rc7
      • 2.Qe5#
    • 1...Bd3
      • 2.Rxd3#
    • 1...Be4
      • 2.fxe4#
    • 1...Be5+
      • 2.Qxe5#
  • Tries
    • 1.Re5+?
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Kd4!
    • 1.Qg5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Be5+
        • 2.Qxe5#
      • 1...Bf5!
  • Keys
    • 1.b4!
      • threat
        • 2.Qc5#
      • 1...Be5+
        • 2.Qxe5#
      • 1...Rc2
        • 2.Rd3#
      • 1...Rc7
        • 2.Qe5#
      • 1...Be4
        • 2.fxe4#
      • 1...Bd6
        • 2.Qf7#
      • 1...d6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);S_CUTB(a)::R(C)
    • R(f);S_CUTB(h)::QAR1(F)
    • B(a);N_GUARD::R(C),XB(a)
    • B(a);OGATE::P(D),XB(a)
    • B(h);CHECK,N_GUARD::QAR1(F),XB(h)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(h);CHECK,OGATE,XR(C)::QAR1(F),XB(h)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(F)
        • B(h);CHECK,N_GUARD,P_SPINB(h)::QAR1(F),XB(h)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • P(B);
    • Threat
      • QAR1(F)
    • Vars
      • B(h);CHECK,N_GUARD::QAR1(F),XB(h)
      • R(c);S_CUTB(a)::R(C)
      • R(f);S_CUTB(h)::QAR1(F)
      • B(a);OGATE::P(D),XB(a)
      • B(h);SBLOCK::QAB(F)
      • P(g);N_GUARD::QAB1(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).