MESON Chess Problem Database

Problem Display
PID: 99223 (8/5pB1/r2Rpn1b/r1pNqp2/2BkNQn1/3P4/3P4/3b2K1 w - - 0 1)

Kiss, Janos

Magyar Sakkelet, 1985

8/5pB1/r2Rpn1b/r1pNqp2/2BkNQn1/3P4/3P4/3b2K1

#2

9 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Sb6#
    • 1...Qxd5
      • 2.Sg5#
    • 1...Se3
      • 2.dxe3#
    • 1...Sxe4
      • 2.Sb6#
    • 1...Sxd5
      • 2.Sg5#
    • 1...Sh5
      • 2.Sb6#
    • 1...Sd7
      • 2.Sg5#
      • 2.Sb6#
    • 1...Sh7
      • 2.Sg5#
      • 2.Sb6#
    • 1...Se8
      • 2.Sg5#
    • 1...Sg8
      • 2.Sg5#
      • 2.Sb6#
  • Tries
    • 1.Sg5+?
      • 1...Qe4
        • 2.Sb6#
      • 1...Se4
        • 2.Sb6#
      • 1...Qxf4!
    • 1.Bxf6?
      • threat
        • 2.Sg5#
        • 2.Sb6#
      • 1...Rxd6
        • 2.Sg5#
      • 1...Bxf4
        • 2.Sb6#
      • 1...fxe4
        • 2.Sb6#
        • 2.Qxe4#
      • 1...exd5
        • 2.Sg5#
        • 2.Rxd5#
      • 1...Rb6
        • 2.Sg5#
        • 2.Sxb6#
      • 1...Rc6
        • 2.Sg5#
      • 1...Bf3
        • 2.Sb6#
      • 1...Bg5
        • 2.Sxg5#
        • 2.Sb6#
      • 1...Bf8
        • 2.Sf2#
        • 2.Sec3#
        • 2.Sg3#
        • 2.Sg5#
      • 1...Sf2
        • 2.Sb6#
        • 2.Bxe5#
        • 2.Qxe5#
      • 1...Se3
        • 2.Sg5#
        • 2.Bxe5#
        • 2.Qxe5#
        • 2.dxe3#
      • 1...Sxf6!
  • Keys
    • 1.Sb6+!
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Qd5
        • 2.Sg5#
      • 1...Sd5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD,P_SPINQ(f),P_SPINS(j),XS(E)::R(H)+S(G)
    • Q(f);N_GUARD,P_SPINQ(f),P_SPINS(j),XS(G)::QAR(F)+S(E)
    • S(c);OGATE::P(B),XS(c)
    • S(j);N_GUARD,P_SPINQ(f),P_SPINS(j),XS(E)::R(H)+S(G)
    • S(j);N_GUARD,P_SPINQ(f),P_SPINS(j),XS(G)::QAR(F)+S(E)
    • S(j);N_GUARD,P_SPINQ(f)::R(H)+S(G)
    • S(j);N_GUARD,P_SPINQ(f)::QAR(F)+S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(f);P_SPINQ(f),P_SPINS(j)::R(H)+S(G)
        • S(j);P_SPINQ(f),P_SPINS(j)::R(H)+S(G)
      • Refutation
        • Q(f);P_SPINS(j),XQ(F)
    • Try
      • B(I);P_PINQ(f),XS(j)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XR(H)::QAR(F)+S(E)
        • B(k);XQ(F)::R(H)+S(G)
        • R(h);::QAR(F)+S(E)
        • B(a);::R(H)+S(G)
      • Refutation
        • S(c);N_SPINQ(f),XB(I)
  • Actual
    • S(G);CHECK
    • Vars
      • Q(f);OGATE,P_SPINS(j),XR(H)::QAR2(F),XQ(f)
      • Q(f);P_SPINQ(f),P_SPINS(j)::QAR(F)+S(E)
      • S(j);P_SPINQ(f),P_SPINS(j)::QAR(F)+S(E)
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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).