MESON Chess Problem Database

Problem Display
PID: 51766 (N7/p2n3R/k7/q2B2Kb/4Pp2/2N2P2/4P1Qb/R7 w - - 0 1)

Dikusarov, Andrey Nikolayovich

StrateGems, 2004

N7/p2n3R/k7/q2B2Kb/4Pp2/2N2P2/4P1Qb/R7

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rxa2#
    • 1...Qa3
      • 2.Rxa3#
    • 1...Qa4
      • 2.Rxa4#
    • 1...Sc5
      • 2.Bc4#
    • 1...Se5
      • 2.Bb7#
    • 1...Sb6
      • 2.Sc7#
  • Tries
    • 1.Rh6+?
      • 1...Sb6
        • 2.Sc7#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Bg6!
    • 1.Qg1?
      • threat
        • 2.Sc7#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Qa2
        • 2.Rxa2#
      • 1...Qa3
        • 2.Rxa3#
      • 1...Qa4
        • 2.Rxa4#
      • 1...Sc5
        • 2.Bc4#
      • 1...Bxg1!
    • 1.Qf2?
      • threat
        • 2.Sc7#
      • 1...Qa2
        • 2.Rxa2#
      • 1...Qa3
        • 2.Rxa3#
      • 1...Qa4
        • 2.Rxa4#
      • 1...Sc5
        • 2.Bc4#
      • 1...Qxa1!
  • Keys
    • 1.Qf1!
      • threat
        • 2.e3#
      • 1...Qxa1
        • 2.Qxa1#
      • 1...Bxf3
        • 2.exf3#
      • 1...Qa2
        • 2.Rxa2#
      • 1...Qa3
        • 2.Rxa3#
      • 1...Qa4
        • 2.Rxa4#
      • 1...Sc5
        • 2.Bc4#
      • 1...Se5
        • 2.Bb7#
      • 1...Sb6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_PINB(G),OGATEB::R(A),XQ(c)
    • S(g);N_PINB(G)::B(G)
    • S(g);SBLOCK::S(J)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • S(g);P_SPINS(g)::S(J)
        • S(g);N_GUARD,P_SPINS(g)::R(I),XS(g)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(C);
      • Threat
        • S(J)
      • Vars
        • Q(c);N_PINB(G),N_SPINQ(c),OGATE,XR(A)::QAR(C),XQ(c)
        • Q(c);N_PINB(G),OGATEB::R(A),XQ(c)
        • S(g);N_PINB(G)::B(G)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);
      • Threat
        • S(J)
      • Vars
        • Q(c);N_PINB(G),OGATEB::R(A),XQ(c)
        • S(g);N_PINB(G)::B(G)
      • Refutation
        • Q(c);N_PINB(G),N_SPINQ(c),XR(A)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+P(B)
    • Vars
      • Q(c);N_PINB(G),N_SPINQ(c),OGATE,XR(A)::QAR(C),XQ(c)
      • B(d);XP(E)::QAB(C)+P(B),XB(d)
      • Q(c);N_PINB(G),OGATEB::R(A),XQ(c)
      • S(g);N_PINB(G)::B(G)
      • S(g);SBLOCK::S(J)
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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).