MESON Chess Problem Database

Problem Display
PID: 10920 (3R4/2p1p3/B1PbP3/1r1N2K1/1p1r1p2/3kp3/2R5/N3B2Q w - - 0 1)

Quack, Godfrey C

The Problemist, 1969

3R4/2p1p3/B1PbP3/1r1N2K1/1p1r1p2/3kp3/2R5/N3B2Q

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Bc5
      • 2.Sxf4#
    • 1...Be5
      • 2.Sxb4#
    • 1...e2
      • 2.Qf3#
  • Tries
    • 1.Qf1+?
      • 1...e2
        • 2.Qxe2#
        • 2.Qf3#
      • 1...Ke4!
  • Keys
    • 1.Qf3!
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Rc4
        • 2.Rd2#
      • 1...Re4
        • 2.Qd1#
      • 1...Bc5
        • 2.Sxf4#
      • 1...Be5
        • 2.Sxb4#
      • 1...b3
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);CHECK,OGATE,XS(E)::QAR2(C),XR(d)
    • B(g);N_PINS(E)::S(E),XP(e)
    • B(g);N_PINS(E)::S(E),XP(c)
    • P(b);OGATEB::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);N_SPINR(f),S_FLIGHT
  • Actual
    • Q(C);P_PINP(b)
    • Vars
      • R(d);CHECK,OGATE,XS(E)::QAR2(C),XR(d)
      • R(d);N_SPINR(f),SBLOCK::R1(D)
      • R(d);SBLOCK::QAR2(C)
      • B(g);N_PINS(E)::S(E),XP(e)
      • B(g);N_PINS(E)::S(E),XP(c)
      • P(c);N_GUARD::R1(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).