MESON Chess Problem Database

Problem Display
PID: 164924 (4K3/B1p2N1b/n1P5/4Q2r/3N1P2/1BpknP2/1P1pr3/2q1b3 w - - 0 1)

Shanshin, Valery Yurevich

Best Problems, 2016

4K3/B1p2N1b/n1P5/4Q2r/3N1P2/1BpknP2/1P1pr3/2q1b3

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5+
      • 2.Sxe5#
    • 1...Rf5
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bg8
      • 2.Qe4#
    • 1...Sd1
      • 2.Qxe2#
    • 1...Sf1
      • 2.Qxe2#
    • 1...Sc2
      • 2.Qxe2#
    • 1...Sg2
      • 2.Qxe2#
    • 1...Sc4
      • 2.Qxe2#
    • 1...Sg4
      • 2.Qxe2#
    • 1...Sd5
      • 2.Qxe2#
    • 1...Sf5
      • 2.Qxe2#
  • Tries
    • 1.Bc4+?
      • 1...Sxc4
        • 2.Qxe2#
      • 1...Kxc4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Qd4#
      • 1...Rxe5
        • 2.Sxe5#
      • 1...Rf2
        • 2.Qxe3#
      • 1...Rg2
        • 2.Qxe3#
      • 1...Reh2
        • 2.Qxe3#
      • 1...Sc2
        • 2.Qxc3#
      • 1...Sf5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(h);CHECK,XQ(F)::S(I),XR(h)
    • R(h);S_CUTB(k)::QAB1(F)
    • B(k);N_GUARD::QAB1(F),XB(k)
    • B(k);N_GUARD::QAB1(F)
    • S(g);OGATE,P_PINQ(F)::QAB1(F),XR(d)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • S(g);OGATE,P_PINQ(F),SBLOCK,XB(B)::QAB1(F),XR(d)
      • Refutation
        • K(f);S_FLIGHT,XB(B)
  • Actual
    • S(D);
    • Threat
      • QAR1(F)
    • Vars
      • R(h);P_PINS(D),XQ(F)::S(I),XR(h)
      • R(d);N_GUARD::QAR1(F),XS(g)
      • S(g);S_CUTQ(a)::QAR1(F),XP(e)
      • S(g);N_GUARD,S_CUTR(h)::QAB(F)
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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).