MESON Chess Problem Database

Problem Display
PID: 185834 (K3R3/3pnp2/R1Nr4/3k1r2/3Pq3/7B/3bQ3/B7 w - - 0 1)

Gaspar, Byron

Chess, 1957

K3R3/3pnp2/R1Nr4/3k1r2/3Pq3/7B/3bQ3/B7

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Sxe7#
    • 1...Qh1
      • 2.Sxe7#
    • 1...Qc2
      • 2.Sxe7#
    • 1...Qg2
      • 2.Sxe7#
    • 1...Qf3
      • 2.Sxe7#
    • 1...Qf4
      • 2.Sxe7#
    • 1...Qg4
      • 2.Sxe7#
    • 1...Rf1
      • 2.Qb5#
    • 1...Rf2
      • 2.Qb5#
    • 1...Rf3
      • 2.Qb5#
    • 1...Rf4
      • 2.Qb5#
    • 1...Re5
      • 2.Qb5#
    • 1...Rg5
      • 2.Qb5#
    • 1...Rh5
      • 2.Qb5#
    • 1...Rff6
      • 2.Qb5#
    • 1...Bc1
      • 2.Qa2#
    • 1...Be1
      • 2.Qa2#
    • 1...Bc3
      • 2.Qa2#
    • 1...Be3
      • 2.Qa2#
    • 1...Bb4
      • 2.Qa2#
    • 1...Bf4
      • 2.Qa2#
    • 1...Ba5
      • 2.Qa2#
    • 1...Bg5
      • 2.Qa2#
    • 1...Bh6
      • 2.Qa2#
    • 1...Sxc6
      • 2.Qb5#
    • 1...Sg6
      • 2.Qb5#
    • 1...Sc8
      • 2.Qb5#
    • 1...Sg8
      • 2.Qb5#
  • Tries
    • 1.Sxe7+?
      • 1...Ke6+
        • 2.d5#
      • 1...Qxe7!
  • Keys
    • 1.Sb4+!
      • 1...Ke6+
        • 2.d5#
      • 1...Bxb4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 27
  • Sets
    • Q(b);N_GUARD::S(F),XS(g)
    • R(d);::QAR2(B)
    • B(a);OGATE::QAB(B)
    • S(g);XS(F)::QAR2(B)
    • S(g);::QAR2(B)
  • Tries
    • Try
      • S(F);CHECK,XS(g)
      • Vars
        • K(c);CHECK,OGATE,P_SPINQ(b),P_SPINR(d),S_FLIGHT::P(D)
      • Refutation
        • Q(b);XS(F)
  • Actual
    • S(F);CHECK
    • Vars
      • K(c);CHECK,OGATE,P_SPINQ(b),P_SPINR(d),P_SPINS(g),S_FLIGHT::P(D)
      • B(a);OGATE,XS(F)::QAB(B)
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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).