MESON Chess Problem Database

Problem Display
PID: 16251 (2R2b2/1P1Pp3/rpK5/1p2B2p/1Pk3qQ/3N4/3PP3/1R3B2 w - - 0 1)

Kirillov, Valery Afanasievich

5th HM., The Problemist, 2000/II

2R2b2/1P1Pp3/rpK5/1p2B2p/1Pk3qQ/3N4/3PP3/1R3B2

#2

12 + 8

56 The Problemist 2002
3713 Snap 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qxd4#
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qf4
      • 2.Qxf4#
  • Tries
    • 1.Sc1?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qd4
        • 2.Qxd4#
        • 2.e3#
      • 1...Ra3!
    • 1.Se1?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qd4
        • 2.Qxd4#
        • 2.e3#
      • 1...Ra3!
    • 1.Sf2?
      • threat
        • 2.d3#
        • 2.e3#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Qd4
        • 2.Qxd4#
        • 2.e3#
      • 1...Ra3!
    • 1.Bg2?
      • threat
        • 2.Bd5#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...e6!
    • 1.Bc3?
      • threat
        • 2.Se5#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...e5
        • 2.Sxe5#
      • 1...Bg7!
    • 1.e3?
      • threat
        • 2.Sc1#
        • 2.Se1#
        • 2.Sf2#
        • 2.Sc5#
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Ra3!
  • Keys
    • 1.Sf4!
      • threat
        • 2.d3#
      • 1...Qf3+
        • 2.exf3#
      • 1...Qe6+
        • 2.Sxe6#
      • 1...Qxd7+
        • 2.Kxd7#
      • 1...Qg2+
        • 2.Sxg2#
      • 1...Qg6+
        • 2.Sxg6#
      • 1...Qxe2
        • 2.Bxe2#
      • 1...Ra3
        • 2.Kxb6#
      • 1...Qh3
        • 2.Sxh3#
      • 1...Qf5
        • 2.e4#
      • 1...Qg3
        • 2.e3#

Anticipated by 86884(1986)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • Q(b);OGATE::QAR1(G),XQ(b)
    • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
    • Q(b);OGATE::QAR(G),XQ(b)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
      • Refutation
        • R(e);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
      • Refutation
        • R(e);
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
      • Refutation
        • R(e);
    • Try
      • B(B);
      • Threat
        • B(B)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
      • Refutation
        • P(g);
    • Try
      • B(H);
      • Threat
        • S(E)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
        • P(g);::S(E),XP(g)
      • Refutation
        • B(h);
    • Try
      • P(D);
      • Threat
        • DUALS(4)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(G),XQ(b)
      • Refutation
        • R(e);
  • Actual
    • S(E);N_PINQ(b)
    • Threat
      • P(C)
    • Vars
      • Q(b);CHECK,OGATE::B(B)+P(D),XQ(b)
      • Q(b);CHECK::QAR(G)+S(E),XQ(b)
      • Q(b);CHECK,XP(K)::R(L)+K(I),XQ(b)
      • Q(b);OGATE,P_SPINQ(b),XP(D)::B(B),XQ(b)
      • R(e);::R(L)+K(I),XP(f)
      • Q(b);::QAR(G)+S(E),XQ(b)
      • Q(b);N_GUARD::B(B)+P(D)
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).