Problem Display
PID: 238307 (b4R2/1B2P1Pp/2qQpK2/n1N1P1P1/5pp1/2NppkB1/7n/6R1 w - - 0 1)

Segers, Marcel

The Problemist, 1990

b4R2/1B2P1Pp/2qQpK2/n1N1P1P1/5pp1/2NppkB1/7n/6R1

#2

12 + 11


15148 Sadier Collection 2021

SOLUTION


  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qxc6#
    • 1...Sc4
      • 2.Qxc6#
    • 1...Sxb7
      • 2.Qxc6#
    • 1...e2
      • 2.Qxd3#
    • 1...fxg3
      • 2.Kxe6#
  • Tries
    • 1.Kxe6?
      • threat
        • 2.Rxf4#
      • 1...Qd5+
        • 2.Qxd5#
      • 1...e2!
    • 1.Sxd3?
      • threat
        • 2.Se1#
      • 1...fxg3
        • 2.Kxe6#
      • 1...e2!
    • 1.Sxe6?
      • threat
        • 2.Sd4#
      • 1...e2
        • 2.Qxd3#
      • 1...Sb3
        • 2.Qxc6#
      • 1...fxg3!
    • 1.Qd4?
      • threat
        • 2.Qxf4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...fxg3!
  • Keys
    • 1.Sb3!
      • threat
        • 2.Sd4#
      • 1...Sxb3
        • 2.Qxc6#
      • 1...fxg3
        • 2.Kxe6#
      • 1...e2
        • 2.Qxd3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD::QAB(G),XQ(h)
    • S(g);N_GUARD,N_SPINQ(h),XB(I)::QAB(G),XQ(h)
    • P(c);OGATEB::QAR2(G),XP(b)
    • P(e);XB(C)::R(L)+K(H),XP(i)
  • Tries
    • Try
      • K(H);P-FLIGHT,P_PINP(e),P_SPINQ(G),XP(i)
      • Threat
        • R1(L),XP(e)
      • Vars
        • Q(h);CHECK,N_PINQ(G)::QAB(G),XQ(h)
      • Refutation
        • P(c);
    • Try
      • S(D);XP(b)
      • Threat
        • S(D)
      • Vars
        • P(e);XB(C)::R(L)+K(H),XP(i)
      • Refutation
        • P(c);
    • Try
      • S(D);XP(i)
      • Threat
        • S(D)
      • Vars
        • P(c);OGATEB::QAR2(G),XP(b)
        • S(g);N_GUARD::QAB(G),XQ(h)
      • Refutation
        • P(e);XB(C)
    • Try
      • Q(G);
      • Threat
        • QAR1(G),XP(e)
      • Vars
        • Q(h);N_GUARD::QAB1(G),XQ(h)
      • Refutation
        • P(e);XB(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • S(g);N_GUARD,XS(D)::QAB(G),XQ(h)
      • P(e);XB(C)::R(L)+K(H),XP(i)
      • P(c);OGATEB::QAR2(G),XP(b)


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).