MESON Chess Problem Database

Problem Display
PID: 40195 (3N4/1p1p1R1B/pK3Bq1/1bn2k2/p1p1p1p1/r3Q1pn/5b2/1r1N1R2 w - - 0 1)

Thomson, PC

Recomm., BCF 025. Ty., 1937-1938

3N4/1p1p1R1B/pK3Bq1/1bn2k2/p1p1p1p1/r3Q1pn/5b2/1r1N1R2

#2

8 + 16

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6+
      • 2.Bb2#
    • 1...Sg1
      • 2.Qg5#
    • 1...Sg5
      • 2.Qxg5#
    • 1...Se6
      • 2.Ba1#
      • 2.Bb2#
      • 2.Bc3#
      • 2.Bd4#
      • 2.Bg7#
      • 2.Bh8#
    • 1...d6
      • 2.Ba1#
      • 2.Bb2#
      • 2.Bc3#
      • 2.Bd4#
      • 2.Bg7#
      • 2.Bh8#
  • Tries
    • 1.Rxf2+?
      • 1...Sxf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Rxf4#
        • 2.Qxf4#
      • 1...gxf2!
  • Keys
    • 1.Qh6!
      • threat
        • 2.Bxg6#
      • 1...Bc6+
        • 2.Bb2#
      • 1...Sb3+
        • 2.Se3#
      • 1...Sd3+
        • 2.Se3#
      • 1...Se6+
        • 2.Bd4#
      • 1...Qxh7
        • 2.Bg7#
      • 1...Sg5
        • 2.Qxg5#
      • 1...Sf4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(j);CHECK,N_PINB(E)::R(F)+B(E)
    • S(e);N_GUARD::QAR1(C)
    • S(e);N_GUARD::QAR1(C),XS(e)
  • Tries
    • Try
      • R(B);CHECK,XB(b)
      • Vars
        • S(e);XR(B)::QAR1(C)
      • Refutation
        • P(d);XR(B)
  • Actual
    • Q(C);
    • Threat
      • B(G),XQ(n)
    • Vars
      • B(j);CHECK,N_PINB(E)::R(F)+B(E)
      • S(k);CHECK,S_CUTR(c)::S(A)
      • S(k);CHECK,N_PINB(E)::R(F)+B(E)
      • Q(n);N_PINB(E),N_SPINQ(n),XB(G)::R(F)+B(E)
      • S(e);N_GUARD::QAR1(C),XS(e)
      • S(e);N_GUARD,N_SPINB(b)::QAR1(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).