MESON Chess Problem Database

Problem Display
PID: 185701 (1B1NR3/2rN1pKp/2Pk2bR/2p1p3/2P5/8/7Q/b4r2 w - - 0 1)

Driver, John Edward

Chess, 1957

1B1NR3/2rN1pKp/2Pk2bR/2p1p3/2P5/8/7Q/b4r2

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Re6#
    • 1...f6
      • 2.Re6#
  • Tries
    • 1.Rxg6+?
      • 1...Rf6
        • 2.Rxf6#
      • 1...fxg6
        • 2.Re6#
      • 1...f6
        • 2.Re6#
      • 1...hxg6!
    • 1.Qh4?
      • threat
        • 2.Qe7#
      • 1...Rf6
        • 2.Qxf6#
      • 1...f6
        • 2.Re6#
      • 1...e4+!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sb7#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...f5+
        • 2.Sf7#
      • 1...f6+
        • 2.Sef7#
      • 1...Rb1
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(h);N_GUARD,P_PINS(E)::R1(I)
    • P(h);N_GUARD,N_SPINB(f),P_PINS(E)::R1(I)
  • Tries
    • Try
      • R(D);CHECK,XB(f)
      • Vars
        • R(b);N_GUARD,N_SPINR(g),P_SPINR(b)::R(D),XR(b)
        • P(h);N_GUARD,P_PINS(E),XR(D)::R1(I)
        • P(h);N_GUARD,P_PINS(E)::R1(I)
      • Refutation
        • P(i);XR(D)
    • Try
      • Q(A);N_PINP(d)
      • Threat
        • QAB1(A)
      • Vars
        • R(b);N_GUARD,N_SPINB(f)::QAR2(A),XR(b)
        • P(h);N_GUARD,N_SPINB(f),P_PINS(E)::R1(I)
      • Refutation
        • P(d);CHECK
  • Actual
    • S(E);P_SPINS(E),XP(d)
    • Threat
      • S(H)
    • Vars
      • B(a);CHECK,N_SPINB(f),OGATE,P_SPINB(a),XS(E)::QAB1(A),XB(a)
      • P(h);CHECK,S_CUTR(b)::S(H)
      • P(h);CHECK,N_PINS(E),N_SPINB(f)::QAB(A)+S(E),DCHECK
      • R(b);N_GUARD::S(H),XP(h)
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).