MESON Chess Problem Database

Problem Display
PID: 23279 (8/6q1/2b1p1N1/R7/1r1k1nQ1/1B1Pr1N1/1P2PBn1/2KR2b1 w - - 0 1)

Saunders, Denis M

The Problemist, 1997

8/6q1/2b1p1N1/R7/1r1k1nQ1/1B1Pr1N1/1P2PBn1/2KR2b1

#2

11 + 9

3936 The Wizard of Oz 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4+
      • 2.dxc4#
    • 1...e5
      • 2.Sf5#
  • Tries
    • 1.Qxf4+?
      • 1...Be4
        • 2.Qxe4#
        • 2.dxe4#
      • 1...Sxf4!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Sf5#
      • 1...Rc4+
        • 2.Qxc4#
      • 1...Sxe2+
        • 2.Sxe2#
      • 1...Sxd3+
        • 2.Rxd3#
      • 1...Qxg6
        • 2.Qe5#
      • 1...Rb5
        • 2.Qc4#
      • 1...Bb5
        • 2.Qb6#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Qf8
        • 2.Qe5#
      • 1...Qf7
        • 2.Qe5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Sh4
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • R(d);CHECK,OGATE::R(B)+P(G),XR(d)
    • P(h);N_GUARD::S(H)
  • Tries
    • Try
      • Q(I);CHECK,XS(f)
      • Refutation
        • S(b);XQ(I)
  • Actual
    • Q(I);N_PINS(f),XP(h)
    • Threat
      • S(H)
    • Vars
      • R(d);CHECK,N_GUARD::QAR1(I),XR(d)
      • S(f);CHECK,XP(D)::S(H),XS(f)
      • S(f);CHECK,OGATE,P_SPINS(f),XP(G)::R1(B),XS(f)
      • Q(i);N_GUARD,XS(K)::QAB1(I)
      • R(d);N_GUARD::QAR1(I)
      • B(g);OGATE::QAB(I)
      • Q(i);N_GUARD::QAB1(I),XQ(i)
      • Q(i);N_GUARD::QAB(I),XQ(i)
      • Q(i);N_GUARD::QAB1(I)
      • B(g);N_GUARD::QAR1(I),XB(g)
      • S(b);N_GUARD::QAB1(I),XR(c)
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).