MESON Chess Problem Database

Problem Display
PID: 106090 (8/5QpB/4Nr2/R4n2/2PBk1bR/1N6/1p2r1p1/1K2n3 w - - 0 1)

Guseidov, G

Shakhmaty (Baku), 1991

8/5QpB/4Nr2/R4n2/2PBk1bR/1N6/1p2r1p1/1K2n3

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sec5#
    • 1...Rxe6
      • 2.Qxf5#
    • 1...Rg6
      • 2.Qxf5#
    • 1...Rh6
      • 2.Qxf5#
    • 1...Sd3
      • 2.Qb7#
    • 1...Sf3
      • 2.Sbc5#
  • Tries
    • 1.Bxf5+?
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Kf3!
    • 1.Rxg4+?
      • 1...Kd3
        • 2.Sec5#
      • 1...Kf3!
    • 1.Re5+?
      • 1...Kd3
        • 2.Sf4#
        • 2.Sec5#
      • 1...Kf3!
    • 1.Rxf5?
      • threat
        • 2.Sbc5#
        • 2.Sec5#
        • 2.Rf4#
      • 1...Kd3
        • 2.Sec5#
      • 1...Rxf5
        • 2.Qxf5#
      • 1...Rxe6
        • 2.Rf4#
        • 2.Re5#
      • 1...Rg6
        • 2.Sbc5#
        • 2.Sec5#
      • 1...Sd3
        • 2.Sg5#
        • 2.Rf4#
        • 2.Qb7#
      • 1...g6!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Sbc5#
      • 1...Kd3
        • 2.Sec5#
      • 1...Kf3
        • 2.Sd2#
      • 1...Rxe6
        • 2.Qxf5#
      • 1...Re3
        • 2.Sd2#
      • 1...Sd3
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(e);N_SPINB(f),S_FLIGHT::S(G)
    • R(h);OGATE,XS(G)::QAB1(H),XS(g)
    • R(h);N_SPINS(g),OGATE::QAB1(H),XS(g)
    • R(h);OGATE::QAB1(H),XS(g)
    • S(a);SBLOCK::QAB(H)
    • S(a);SBLOCK::S(B)
  • Tries
    • Try
      • B(I);CHECK,XS(g)
      • Vars
        • R(h);OGATE,XB(I)::QAB1(H),XR(h)
      • Refutation
        • K(e);N_SPINB(f),S_FLIGHT
    • Try
      • R(E);CHECK,XB(f)
      • Vars
        • K(e);S_FLIGHT::S(G)
      • Refutation
        • K(e);N_SPINS(g),S_FLIGHT
    • Try
      • R(F);CHECK
      • Refutation
        • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT
    • Try
      • R(F);XS(g)
      • Threat
        • DUALS(3)
      • Vars
        • K(e);N_SPINB(f),S_FLIGHT::S(G)
        • R(h);OGATE,P_SPINR(h),XR(F)::QAB1(H),XR(h)
      • Refutation
        • P(i);
  • Actual
    • R(F);
    • Threat
      • S(B)
    • Vars
      • K(e);N_SPINB(f),S_FLIGHT::S(G)
      • K(e);N_SPINB(f),N_SPINS(g),S_FLIGHT::R(F)+S(B),DCHECK
      • R(h);OGATE,XS(G)::QAB1(H),XS(g)
      • R(c);N_GUARD::S(B)
      • S(a);SBLOCK::QAB(H)
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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).