MESON Chess Problem Database

Problem Display
PID: 181155 (2B1NB2/4p3/2p1PPK1/3kp3/N7/4P3/3P3R/Q7 w - - 0 1)

Chapin, Irving

San Francisco Chronicle, 1904

2B1NB2/4p3/2p1PPK1/3kp3/N7/4P3/3P3R/Q7

#2

11 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...e4
      • 2.Qd4#
  • Tries
    • 1.Sb6+?
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke4!
    • 1.Rh4?
      • threat
        • 2.Qa2#
      • 1...e4
        • 2.Qd4#
      • 1...c5!
    • 1.Qf1?
      • threat
        • 2.Qd3#
      • 1...Ke4
        • 2.Sc3#
      • 1...e4
        • 2.Rh5#
      • 1...c5!
    • 1.d3?
      • threat
        • 2.Qa2#
        • 2.e4#
      • 1...e4
        • 2.Rh5#
        • 2.Qd4#
      • 1...c5!
  • Keys
    • 1.Sb2!
      • 1...Ke4
        • 2.Qh1#
      • 1...Kc5
        • 2.Qa5#
      • 1...exf6
        • 2.Sxf6#
      • 1...e4
        • 2.Rh5#
      • 1...c5
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(A)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(d)::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • QAB(A)
      • Vars
        • P(b);N_GUARD::QAR1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(a);S_FLIGHT::S(E)
        • P(b);OGATEB,SBLOCK::R(C)
      • Refutation
        • P(c);
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Refutation
        • P(c);
  • Actual
    • S(E);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);P-FLIGHT,P_SPINP(d)::QAR2(A)
      • P(d);XP(G)::S(J),XP(d)
      • P(b);OGATEB,SBLOCK::R(C)
      • P(c);OGATEB,SBLOCK::QAB(A)
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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).