MESON Chess Problem Database

Problem Display
PID: 102457 (KQ4bB/1pN3r1/7n/N1p2p1q/4kP2/5R2/1r2P3/7B w - - 0 1)

Vasan, GS

Le Courrier des Echecs, 1957

KQ4bB/1pN3r1/7n/N1p2p1q/4kP2/5R2/1r2P3/7B

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rd3#
  • Tries
    • 1.Qxb7+?
      • 1...Kd4
        • 2.Bxg7#
        • 2.Rd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rxb7!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Qe5#
      • 1...Qe8
        • 2.Rg3#
      • 1...Rc7
        • 2.Sc3#
      • 1...Re7
        • 2.Sc3#
      • 1...Sg4
        • 2.Rh3#
      • 1...Sf7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • K(b);P-FLIGHT,P_SPINR(h)::R1(C)
  • Tries
    • Try
      • Q(H);CHECK,XP(g)
      • Vars
        • B(i);N_GUARD,P_PINQ(H),P_SPINB(i)::QAB1(H),XB(i)
      • Refutation
        • R(a);XQ(H)
  • Actual
    • S(F);
    • Threat
      • QAR1(H)
    • Vars
      • K(b);S_FLIGHT::QAR1(H)
      • Q(e);N_GUARD,P_PINQ(H)::B(A)+R(C)
      • R(h);::S(F)
      • S(f);S_CUTQ(e),S_CUTR(h)::B(A)+R(C)
      • S(f);S_CUTB(i),S_CUTR(h)::QAB(H),XP(g)
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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).