MESON Chess Problem Database

Problem Display
PID: 134006 (b2r1N1n/K1N4R/2p1Bkp1/p3r1p1/2PP4/8/5b2/B1Q2Rq1 w - - 0 1)

Driver, John Edward

The Field, 1964

(First published on Thu Jan 9 1964)

b2r1N1n/K1N4R/2p1Bkp1/p3r1p1/2PP4/8/5b2/B1Q2Rq1

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.d5#
    • 1...Rxd4
      • 2.Se8#
    • 1...Rd5
      • 2.Se8#
    • 1...Rd6
      • 2.Se8#
    • 1...Rd7
      • 2.Sxd7#
    • 1...Rb8
      • 2.Sd7#
    • 1...Rc8
      • 2.Sd7#
    • 1...Re8
      • 2.Sxe8#
      • 2.Sd7#
    • 1...Sf7
      • 2.Rxf7#
    • 1...c5
      • 2.dxe5#
  • Tries
    • 1.Rxf2+?
      • 1...Rf5
        • 2.d5#
      • 1...Qxf2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Qe7#
      • 1...Rxe6
        • 2.Qf3#
      • 1...Rc5
        • 2.d5#
      • 1...Rd6
        • 2.Se8#
      • 1...Rd7
        • 2.Sxd7#
      • 1...Re8
        • 2.Sxe8#
        • 2.Sd7#
      • 1...Sf7
        • 2.Rxf7#
      • 1...c5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(d);N_PINP(E)::B(A)+P(E)
    • R(j);N_GUARD,XP(E)::S(H)
    • R(j);N_GUARD::S(H)
    • R(j);N_GUARD,P_PINS(H)::S(J),XR(j)
    • R(j);N_GUARD::S(J)
    • S(k);N_GUARD::R1(I),XS(k)
    • P(f);N_PINP(E)::P(E),XR(d)
  • Tries
    • Try
      • R(C);CHECK,N_SPINP(E),XB(b)
      • Vars
        • R(d);P_SPINR(d),S_CUTQ(a)::B(A)+P(E)
      • Refutation
        • Q(a);P_PINP(E),XR(C)
  • Actual
    • Q(B);
    • Threat
      • QAB1(B)
    • Vars
      • R(d);N_GUARD,XB(F)::QAR(B)
      • R(d);N_PINP(E)::B(A)+P(E)
      • R(j);N_GUARD::S(H)
      • R(j);N_GUARD,P_PINS(H)::S(J),XR(j)
      • S(k);N_GUARD::R1(I),XS(k)
      • P(f);N_PINP(E)::P(E),XR(d)
HTML5 logo

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).