MESON Chess Problem Database

Problem Display
PID: 250472 (1n4K1/1p6/4kPp1/NpBR2P1/p1QP4/5Pn1/8/8 w - - 0 1)

Dyachuk, Vasyl Vasilovich

Skrinnik, Oleksandr Petrovich

Uralski Problemist, 2009

1n4K1/1p6/4kPp1/NpBR2P1/p1QP4/5Pn1/8/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sf5
      • 2.Rd6#
    • 1...Sd7
      • 2.Re5#
  • Tries
    • 1.Qe2+?
      • 1...Kxd5
        • 2.Qa2#
        • 2.Qe5#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxe2!
    • 1.Qd3?
      • threat
        • 2.Rd6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qe4#
      • 1...Kxd5!
    • 1.Qxb5?
      • threat
        • 2.Re5#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sc6!
    • 1.f7?
      • threat
        • 2.f8S#
      • 1...Sd7
        • 2.Re5#
      • 1...bxc4!
  • Keys
    • 1.Qc2!
      • threat
        • 2.Rd6#
      • 1...Kxd5
        • 2.Qa2#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);SBLOCK::QAB(B)+R(F),DCHECK
    • S(g);SBLOCK::QAB(B)+R(F),DCHECK
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • R1(F)
      • Vars
        • S(a);N_GUARD::QAR2(B),XS(a)
        • S(a);N_GUARD::QAR2(B)
      • Refutation
        • K(d);S_FLIGHT,XR(F)
    • Try
      • Q(B);XP(c)
      • Threat
        • R1(F)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
        • S(g);N_GUARD::QAB1(B),XS(g)
      • Refutation
        • S(g);
    • Try
      • P(H);
      • Threat
        • P=S
      • Vars
        • S(g);SBLOCK::QAB(B)+R(F),DCHECK
      • Refutation
        • P(c);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • R1(F)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB(B)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • S(a);N_GUARD::QAR2(B)
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).