MESON Chess Problem Database

Problem Display
PID: 91032 (BQ5K/4pR2/2bpp3/4k1pp/1n6/1PP2p2/rB1n1N2/3R2N1 w - - 0 1)

May, Willy Paul

Die Schwalbe, 1949

BQ5K/4pR2/2bpp3/4k1pp/1n6/1PP2p2/rB1n1N2/3R2N1

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qb5#
    • 1...Ra1
      • 2.c4#
    • 1...Ra3
      • 2.c4#
    • 1...Ra4
      • 2.c4#
    • 1...Ra5
      • 2.c4#
    • 1...Ra6
      • 2.c4#
    • 1...Ra7
      • 2.c4#
    • 1...Rxa8
      • 2.c4#
    • 1...Se4
      • 2.Sxf3#
  • Tries
    • 1.cxb4+?
      • 1...Kd5
        • 2.Rxd2#
        • 2.Qb5#
      • 1...Rxb2!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxg5#
      • 1...Kd5
        • 2.Rf5#
      • 1...Rxa8
        • 2.c4#
      • 1...Be4
        • 2.Qg7#
      • 1...Se4
        • 2.Sxf3#
      • 1...g4
        • 2.Qg5#
      • 1...d5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • K(e);N_SPINP(i),P-FLIGHT,P_SPINB(h),P_SPINS(b)::QAR2(I)
    • R(a);N_GUARD::B(C)+P(F)
    • R(a);N_GUARD,P_PINQ(I),XB(H)::B(C)+P(F)
    • S(b);N_GUARD,S_CUTB(h)::S(B),XP(c)
  • Tries
    • Try
      • P(F);CHECK,XS(d)
      • Refutation
        • R(a);XB(C)
  • Actual
    • Q(I);N_PINP(i)
    • Threat
      • QAR2(I),XP(f)
    • Vars
      • K(e);P-FLIGHT,P_SPINB(h),P_SPINS(b)::R(G)
      • R(a);N_GUARD,P_PINQ(I),XB(H)::B(C)+P(F)
      • B(h);::QAB(I)
      • S(b);N_GUARD,S_CUTB(h)::S(B),XP(c)
      • P(f);::QAR2(I)
      • P(i);OGATEB,SBLOCK::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).