MESON Chess Problem Database

Problem Display
PID: 95872 (7B/4b2p/1Q1q3k/8/6PN/5N2/8/5K1R w - - 0 1)

Vasta, Jan

Narodni Politika, 1913

7B/4b2p/1Q1q3k/8/6PN/5N2/8/5K1R

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qg6
      • 2.Sf5#
    • 1...Bxh4
      • 2.Qxd6#
  • Tries
    • 1.Sg2+?
      • 1...Bh4
        • 2.Qxd6#
      • 1...Kg6!
    • 1.Qe3+?
      • 1...Bg5
        • 2.Qxg5#
      • 1...Qf4!
    • 1.Qxd6+?
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bxd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf7#
      • 1...Qf6+
        • 2.Shf3#
      • 1...Kg5
        • 2.Qe3#
      • 1...Bxh4
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);::R(B)+S(E),DCHECK
    • B(c);N_GUARD,P_SPINB(c),XS(E)::QAR(F),XQ(a)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(c);P_SPINB(c)::QAR(F),XQ(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);CHECK,N_PINQ(a)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(F),XB(c)
      • Refutation
        • Q(a);P_PINS(C),P_SPINQ(a)
    • Try
      • Q(F);CHECK,XQ(a)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR2(F),XB(c)
      • Refutation
        • B(c);XQ(F)
  • Actual
    • S(C);
    • Threat
      • S(C)
    • Vars
      • Q(a);CHECK,S_CUTB(c)::R(B)+S(E)
      • K(b);N_SPINQ(a),S_FLIGHT::QAB(F)
      • B(c);N_GUARD,P_SPINB(c),XS(E)::QAB(F)
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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).