MESON Chess Problem Database

Problem Display
PID: 218514 (1R2n3/4p2Q/p7/3p2p1/N1k4b/8/2K2P2/B1n4B w - - 0 1)

Bettmann, Jacob

Cincinnati Commercial, 1881

1R2n3/4p2Q/p7/3p2p1/N1k4b/8/2K2P2/B1n4B

#2

7 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa2
      • 2.Qd3#
    • 1...Se2
      • 2.Qd3#
    • 1...Sb3
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
  • Tries
    • 1.Kd2?
      • threat
        • 2.Qc2#
      • 1...Sa2
        • 2.Qd3#
      • 1...Se2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sb3+!
    • 1.Bc3?
      • threat
        • 2.Rb4#
      • 1...Sa2
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...a5!
    • 1.Qe4+?
      • 1...d4
        • 2.Qd5#
        • 2.Qc6#
        • 2.Qxd4#
        • 2.Qe6#
      • 1...dxe4!
    • 1.Qxe7?
      • threat
        • 2.Rb4#
        • 2.Qb4#
        • 2.Qc5#
      • 1...Bxf2
        • 2.Rb4#
        • 2.Qb4#
      • 1...Sa2
        • 2.Qc5#
        • 2.Qe2#
      • 1...Sb3
        • 2.Rb4#
        • 2.Qb4#
        • 2.Qe2#
      • 1...Sd6
        • 2.Qc7#
      • 1...a5
        • 2.Qc5#
      • 1...Sd3!
  • Keys
    • 1.Kxc1!
      • threat
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB1(F)
    • S(a);N_GUARD::QAB1(F),XS(a)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR2(F)
      • Vars
        • S(a);N_GUARD::QAB1(F)
        • S(a);N_GUARD::QAB1(F),XS(a)
      • Refutation
        • S(a);CHECK
    • Try
      • B(A);
      • Threat
        • R1(G)
      • Vars
        • S(a);N_GUARD::QAB1(F)
        • S(a);N_GUARD::QAB1(F),XS(a)
      • Refutation
        • P(f);
    • Try
      • Q(F);CHECK
      • Refutation
        • P(d);XQ(F)
    • Try
      • Q(F);XP(g)
      • Threat
        • DUALS(3)
      • Vars
        • S(h);N_GUARD::QAR(F)
        • P(f);::QAR1(F)
      • Refutation
        • S(a);
  • Actual
    • K(C);P-FLIGHT,XS(a)
    • Threat
      • QAR2(F)
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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).