MESON Chess Problem Database

Problem Display
PID: 40420 (2n1KR2/3p4/1n1Pp3/q1B1pN2/4k2p/R1b3PP/B1P1p3/1Q2N3 w - - 0 1)

Howard, David M

Pike, Arthur G

Problem Observer, 2001

2n1KR2/3p4/1n1Pp3/q1B1pN2/4k2p/R1b3PP/B1P1p3/1Q2N3

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Ba1
      • 2.Re3#
      • 2.c3#
      • 2.c4#
    • 1...Bxe1
      • 2.Re3#
      • 2.c4#
    • 1...Bb2
      • 2.Re3#
      • 2.c3#
      • 2.c4#
    • 1...Bd2
      • 2.c3#
      • 2.c4#
    • 1...Bb4
      • 2.Re3#
      • 2.c3#
      • 2.c4#
    • 1...Bd4
      • 2.c3#
      • 2.c4#
    • 1...Sa4
      • 2.Qb7#
    • 1...Sc4
      • 2.Qb7#
    • 1...Sa8
      • 2.Qb7#
    • 1...Sxd6+
      • 2.Sxd6#
    • 1...hxg3
      • 2.Sxg3#
  • Tries
    • 1.Qb4+?
      • 1...Bxb4
        • 2.Re3#
      • 1...Bd4
        • 2.Re3#
      • 1...Sc4
        • 2.Qb7#
      • 1...Qxb4!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Sg5#
      • 1...Sxd6+
        • 2.Sxd6#
      • 1...Kxf3
        • 2.Qh1#
      • 1...hxg3
        • 2.Sxg3#
      • 1...Sc4
        • 2.Qb7#
      • 1...Bd2
        • 2.c4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(g);OGATE::QAB(A)
    • S(j);CHECK,XP(J)::S(I),XS(j)
    • P(d);XP(F)::S(I),XP(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(b);OGATE,XQ(A)::R1(E)
        • B(b);OGATE,P_SPINB(b)::R1(E)
        • S(g);OGATE,P_SPINS(g)::QAB(A)
      • Refutation
        • Q(e);XQ(A)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • S(j);CHECK,XP(J)::S(I),XS(j)
      • K(c);OGATEB,P_SPINB(b),S_FLIGHT,XS(B)::QAB(A)
      • P(d);XP(F)::S(I),XP(d)
      • S(g);OGATE::QAB(A)
      • B(b);OGATE::QAB(A)+P(D)
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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).