MESON Chess Problem Database

Problem Display
PID: 200791 (6B1/6p1/3q1PR1/R2n3n/2N1k3/1p4b1/5rP1/3Q1NBK w - - 0 1)

Larrain, Santiago

The Problemist, 1983

6B1/6p1/3q1PR1/R2n3n/2N1k3/1p4b1/5rP1/3Q1NBK

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qg4#
    • 1...Kf5
      • 2.Qg4#
    • 1...Qf4
      • 2.Qxd5#
    • 1...Ra2
      • 2.Qf3#
    • 1...Rb2
      • 2.Qf3#
    • 1...Rc2
      • 2.Qf3#
    • 1...Rd2
      • 2.Qf3#
    • 1...Rf3
      • 2.Qxf3#
    • 1...Rf4
      • 2.Qb1#
    • 1...Rf5
      • 2.Qd4#
    • 1...Sdf4
      • 2.Sxd6#
    • 1...Shf4
      • 2.Sxg3#
  • Tries
    • 1.Bxd5+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Qxd5!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Qg4#
      • 1...Kxd4!
    • 1.Qxd5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Qxd5!
  • Keys
    • 1.Bh7!
      • threat
        • 2.Rg4#
      • 1...Kf4
        • 2.Rg4#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Qf4
        • 2.Qxd5#
      • 1...Rf4
        • 2.Qb1#
      • 1...Rf5
        • 2.Qd4#
      • 1...Bf4
        • 2.Rxg7#
      • 1...Sdf4
        • 2.Sxd6#
      • 1...Shf4
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(d);P-FLIGHT::QAR1(A)
    • K(d);P_SPINS(e),S_FLIGHT::QAB1(A)
    • Q(g);N_GUARD,SBLOCK::QAB1(A),XS(e)
    • R(a);N_GUARD::QAB1(A)
    • R(a);N_GUARD::QAB1(A),XR(a)
    • R(a);N_GUARD,SBLOCK::QAB(A)
    • R(a);SBLOCK::QAR1(A)
    • S(e);SBLOCK,S_CUTB(c)::S(F),XQ(g)
    • S(f);N_GUARD,SBLOCK,S_CUTQ(g)::S(B),XB(c)
  • Tries
    • Try
      • B(J);CHECK,XS(e)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
        • K(d);S_FLIGHT::QAB1(A)
      • Refutation
        • Q(g);XB(J)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,P_SPINS(e),S_FLIGHT::QAB1(A)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(a),XQ(A)
    • Try
      • Q(A);CHECK,XS(e)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • Q(g);XQ(A)
  • Actual
    • B(J);
    • Threat
      • B(J)+R(I),DCHECK
    • Vars
      • K(d);P_SPINS(e),S_FLIGHT::QAB1(A)
      • Q(g);N_GUARD,SBLOCK::QAB1(A),XS(e)
      • R(a);N_GUARD,SBLOCK::QAB(A)
      • R(a);SBLOCK::QAR1(A)
      • B(c);SBLOCK,S_CUTR(a)::B(J)+R(I),XP(h)
      • S(e);SBLOCK,S_CUTB(c)::S(F),XQ(g)
      • S(f);N_GUARD,SBLOCK,S_CUTQ(g)::S(B),XB(c)
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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).