MESON Chess Problem Database

Problem Display
PID: 31650 (8/pB1b4/2r3QK/2pk4/N4pp1/b7/3N4/B2R4 w - - 0 1)

Schiffmann, Israel Abraham

The Problemist, 1927

8/pB1b4/2r3QK/2pk4/N4pp1/b7/3N4/B2R4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...Be6
      • 2.Qd3#
    • 1...Bc8
      • 2.Bxc6#
      • 2.Qxc6#
    • 1...c4
      • 2.Sb1#
      • 2.Sf1#
      • 2.Sb3#
      • 2.Sf3#
      • 2.Se4#
    • 1...a5
      • 2.Sb6#
    • 1...a6
      • 2.Sb6#
  • Tries
    • 1.Sc3+?
      • 1...Ke5
        • 2.Sc4#
      • 1...Kd4!
    • 1.Re1?
      • threat
        • 2.Re5#
      • 1...Be6
        • 2.Qd3#
        • 2.Qxe6#
      • 1...Bb2!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qd6#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Be6
        • 2.Qe4#
      • 1...c4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(h);N_PINQ(E),SBLOCK::QAR2(E)
    • P(g);N_GUARD::S(D)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);N_SPINR(f),P-FLIGHT::S(C)
      • Refutation
        • K(e);N_SPINR(f),P-FLIGHT
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Refutation
        • B(a);
  • Actual
    • B(A);
    • Threat
      • QAR1(E)
    • Vars
      • K(e);N_SPINR(f),P-FLIGHT,XB(A)::S(C)
      • B(h);N_PINQ(E),SBLOCK::QAB1(E)
      • P(d);SBLOCK::R(B)+S(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).