MESON Chess Problem Database

Problem Display
PID: 75937 (r1b5/2Pp2p1/B1pPpp1p/RpP2R2/4k2P/b5PP/PBP3K1/Q2N4 w - - 0 1)

Moller, Herbert

L'Alfiere di Re, 1922

r1b5/2Pp2p1/B1pPpp1p/RpP2R2/4k2P/b5PP/PBP3K1/Q2N4

#2

15 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Bd3#
  • Tries
    • 1.Sf2+?
      • 1...Ke3
        • 2.Qe1#
      • 1...Kxf5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Kxf5
        • 2.c4#
      • 1...Bxb2
        • 2.c3#
      • 1...exf5
        • 2.c4#
      • 1...e5
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATE::B(M)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT,XR(L)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);S_FLIGHT,XR(L)::QAB(A)+P(E)
      • B(a);XB(D)::QAB(A)+P(E)
      • P(e);SBLOCK,XR(L)::QAB(A)+P(E)
      • P(e);::QAB(A)+P(E)
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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).