MESON Chess Problem Database

Problem Display
PID: 133359 (1N1n1R2/1B3pK1/2pPk3/2PN2p1/1r1p4/3PP3/1B4pQ/q7 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

2nd HM., Banny MT, 1997

1N1n1R2/1B3pK1/2pPk3/2PN2p1/1r1p4/3PP3/1B4pQ/q7

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...dxe3
      • 2.Qe5#
    • 1...cxd5
      • 2.Bc8#
    • 1...f5
      • 2.Sc7#
  • Tries
    • 1.Re8+?
      • 1...Kxd5
        • 2.Re5#
        • 2.Qe5#
      • 1...Kf5!
    • 1.Qf4?
      • threat
        • 2.Sc7#
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qf5#
      • 1...Rxb7
        • 2.Qe4#
      • 1...dxe3
        • 2.Sc7#
        • 2.Qe5#
      • 1...cxd5
        • 2.Bc8#
        • 2.Re8#
        • 2.Qf6#
      • 1...Qa5
        • 2.Qe4#
      • 1...f5
        • 2.Sc7#
        • 2.Qxf5#
      • 1...gxf4!
    • 1.Qxg2?
      • threat
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kf5
        • 2.Qe4#
      • 1...dxe3
        • 2.Bc8#
      • 1...cxd5
        • 2.Qxd5#
      • 1...f5
        • 2.Re8#
      • 1...Qh1!
    • 1.e4?
      • threat
        • 2.Sc7#
        • 2.Bc8#
        • 2.Re8#
      • 1...Sxb7
        • 2.Sc7#
        • 2.Re8#
      • 1...cxd5
        • 2.Bxd5#
        • 2.Bc8#
        • 2.Re8#
      • 1...Qa5
        • 2.Bc8#
        • 2.Re8#
      • 1...Qa6
        • 2.Sc7#
        • 2.Re8#
      • 1...Qa7
        • 2.Sc7#
        • 2.Re8#
      • 1...Rxb7!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qe4#
      • 1...Kxd5
        • 2.Qf5#
      • 1...Ke5
        • 2.Qe4#
      • 1...dxe3
        • 2.Sc7#
      • 1...cxd5
        • 2.Re8#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(d);P_PINB(A),XP(D)::QAR1(B)
    • P(f);SBLOCK,XS(F)::B(H)
    • P(h);::S(F)
  • Tries
    • Try
      • R(K);CHECK
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • K(g);P_SPINP(f),S_FLIGHT,XS(F)::QAR2(B)
        • R(c);XB(H)::QAR2(B)
        • Q(a);::QAR2(B)
      • Refutation
        • P(e);XQ(B)
    • Try
      • Q(B);XP(b)
      • Threat
        • QAR2(B)
      • Vars
        • K(g);P-FLIGHT,P_SPINP(d)::QAR1(B)
        • K(g);P_SPINP(h),S_FLIGHT::QAB1(B)
        • P(d);P_PINB(A),XP(D)::B(H)
        • P(f);OGATE,XS(F)::QAB1(B),XP(f)
        • P(h);SBLOCK::R(K)
      • Refutation
        • Q(a);
    • Try
      • P(D);
      • Threat
        • DUALS(3)
      • Refutation
        • R(c);XB(H)
  • Actual
    • Q(B);
    • Threat
      • QAR2(B)
    • Vars
      • K(g);P_SPINP(f),S_FLIGHT,XS(F)::QAR2(B)
      • K(g);P-FLIGHT,P_SPINP(d)::QAR1(B)
      • P(d);P_PINB(A),XP(D)::S(F)
      • P(f);XS(F)::R(K)
      • P(h);::QAB1(B),XP(h)
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).