MESON Chess Problem Database

Problem Display
PID: 70233 (3R4/1NpbB3/3bNP2/3kpp1R/p2p4/p4P2/P1Q5/1K6 w - - 0 1)

Salamanca, Tomas

Good Companions (December), 1923

3R4/1NpbB3/3bNP2/3kpp1R/p2p4/p4P2/P1Q5/1K6

#2

10 + 9

3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe6
      • 2.Qc4#
    • 1...Bb4
      • 2.Sxc7#
    • 1...Bxe7
      • 2.Sxc7#
    • 1...Bb5
      • 2.Sxc7#
    • 1...Bc6
      • 2.Sxc7#
    • 1...Bxe6
      • 2.Qc5#
    • 1...Bc8
      • 2.Sxc7#
    • 1...Be8
      • 2.Sxc7#
    • 1...f4
      • 2.Sxf4#
  • Tries
    • 1.Sxd6?
      • threat
        • 2.Sxc7#
        • 2.Qc4#
      • 1...Kxe6
        • 2.Qc4#
      • 1...Bxe6
        • 2.Qc4#
      • 1...cxd6
        • 2.Sc7#
      • 1...e4
        • 2.Qxe4#
      • 1...Bb5
        • 2.Sxc7#
      • 1...d3
        • 2.Qc4#
      • 1...c6
        • 2.Sc7#
        • 2.Qc4#
      • 1...c5!
    • 1.Qb3+?
      • 1...Kc6
        • 2.Sa5#
      • 1...axb3!
    • 1.Qc5+?
      • 1...Kxe6
        • 2.Qc4#
      • 1...Bxc5!
  • Keys
    • 1.Sa5!
      • threat
        • 2.Qc4#
      • 1...Kxe6
        • 2.Qc4#
      • 1...Bxe7
        • 2.Qc6#
      • 1...e4
        • 2.Qxe4#
      • 1...Bb5
        • 2.Sxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • K(d);S_FLIGHT,XS(F)::QAB(C)
    • B(g);N_GUARD,P_SPINB(i)::S(F),XP(h)
    • B(g);N_GUARD,P_SPINB(i),XB(I)::S(F),XP(h)
    • B(i);P_SPINB(g)::S(F),XP(h)
    • B(i);P_SPINB(g),SBLOCK,XS(F)::QAR1(C)
    • P(f);P_SPINP(e)::S(F),XP(f)
  • Tries
    • Try
      • S(H);XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);S_FLIGHT,XS(F)::QAB(C)
        • B(i);SBLOCK,XS(F)::QAB1(C)
        • P(h);XS(H)::S(F)
        • P(e);P_SPINP(f)::QAB1(C),XP(e)
        • B(i);::S(F),XP(h)
        • P(c);::QAB1(C)
      • Refutation
        • P(h);
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::S(H)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XS(F)::QAB(C)
      • Refutation
        • B(g);P_SPINB(i),XQ(C)
  • Actual
    • S(H);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);S_FLIGHT,XS(F)::QAB(C)
      • B(g);P_SPINB(i),XB(I)::QAB1(C)
      • P(e);P_SPINP(f)::QAB1(C),XP(e)
      • B(i);P_SPINB(g)::S(F),XP(h)
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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).