MESON Chess Problem Database

Problem Display
PID: 9767 (1Nb2b2/n1p2Bp1/4p3/6R1/N1k2P1R/2p1P2K/8/1Q6 w - - 0 1)

Blake, Percy Francis

7th Prize, Philadelphia Sunday Item, 1909

1Nb2b2/n1p2Bp1/4p3/6R1/N1k2P1R/2p1P2K/8/1Q6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Bxe6#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sc6
      • 2.Qb5#
    • 1...c5
      • 2.Sb6#
    • 1...c6
      • 2.Sb6#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Sa5#
      • 1...Sxc6
        • 2.Qb5#
      • 1...c2
        • 2.Qxc2#
      • 1...Bb4!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Rd4#
      • 1...exd5+
        • 2.f5#
      • 1...e5+
        • 2.Rd7#
      • 1...Kxd5
        • 2.Qd3#
      • 1...Bb4
        • 2.Qa2#
      • 1...Bc5
        • 2.Rxc5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sc6
        • 2.Qb5#
      • 1...c5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(g);N_GUARD::B(H),XP(c)
    • B(h);N_GUARD::R1(G),XB(h)
    • S(d);N_GUARD::QAB1(A),XS(d)
    • S(d);N_GUARD::QAB1(A)
    • P(e);N_GUARD::S(D)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • S(d);N_GUARD,XS(I)::QAB1(A)
        • P(a);OGATEB::QAR2(A),XP(a)
      • Refutation
        • B(h);
  • Actual
    • R(G);N_PINP(c)
    • Threat
      • R1(G)
    • Vars
      • P(c);CHECK,P_SPINP(c),XR(G)::R(F)+P(E)
      • P(c);CHECK,OGATEB::B(H)+R(G)
      • K(b);P_SPINP(c),S_FLIGHT,XR(G)::QAR2(A)
      • B(h);SBLOCK::QAB(A)
      • B(h);N_GUARD::R1(G),XB(h)
      • S(d);N_GUARD::QAB1(A),XS(d)
      • S(d);N_GUARD::QAB1(A)
      • P(e);N_GUARD::S(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).