MESON Chess Problem Database

Problem Display
PID: 48455 (1n6/5Q2/1pPNn1K1/1p1kpN2/1BR5/2Pb1P2/1p6/1q1R4 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Valtonen, Kari

3rd HM., Suomen Shakki, 1991

1n6/5Q2/1pPNn1K1/1p1kpN2/1BR5/2Pb1P2/1p6/1q1R4

#2

10 + 9

422 Suomen Tehtavaniekat 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Rxd3#
    • 1...Qa1
      • 2.Rxd3#
    • 1...Qc1
      • 2.Rxd3#
  • Tries
    • 1.Kh5?
      • threat
        • 2.Se3#
        • 2.Se7#
      • 1...Sxc6
        • 2.Se3#
      • 1...bxc4
        • 2.Se7#
      • 1...Qc1
        • 2.Se7#
        • 2.Rxd3#
      • 1...e4!
    • 1.Kf6?
      • threat
        • 2.Se3#
        • 2.Se7#
        • 2.Qxe6#
      • 1...Sxc6
        • 2.Se3#
        • 2.Qxe6#
      • 1...bxc4
        • 2.Se7#
      • 1...Qc1
        • 2.Se7#
        • 2.Rxd3#
        • 2.Qxe6#
      • 1...Sd7+!
    • 1.Se4?
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qxe6#
      • 1...bxc4
        • 2.Se7#
      • 1...Qc1!
    • 1.Rd4+?
      • 1...Kxc6
        • 2.Qb7#
      • 1...exd4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Se7#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Sxc6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::R(A),XB(c)
  • Tries
    • Try
      • K(I);N_SPINS(F),S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(i);XP(G)::S(F)
        • P(d);XR(E)::S(F)
      • Refutation
        • P(f);
    • Try
      • K(I);N_SPINS(F),P-FLIGHT
      • Threat
        • DUALS(3)
      • Vars
        • P(d);XR(E)::S(F)
      • Refutation
        • S(i);CHECK
    • Try
      • S(H);N_SPINS(F)
      • Threat
        • S(F)
      • Vars
        • K(e);N_SPINB(c),S_FLIGHT,XR(E)::QAB(J),XS(h)
        • P(d);SBLOCK,XR(E)::S(F)
      • Refutation
        • Q(a);
    • Try
      • R(E);CHECK,N_PINB(c)
      • Vars
        • K(e);N_SPINS(h),S_FLIGHT,XP(G)::QAB1(J)
      • Refutation
        • P(f);XR(E)
  • Actual
    • R(E);N_SPINS(F)
    • Threat
      • S(F)
    • Vars
      • K(e);N_SPINB(c),N_SPINS(h),OGATEB,S_FLIGHT,XP(G)::QAB1(J)
      • S(i);SBLOCK,XP(G)::S(F)
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).