MESON Chess Problem Database

Problem Display
PID: 195067 (8/8/K5B1/4p3/4P3/3k2N1/N4Q2/8 w - - 0 1)

Schaffer, Hans

Reichspost, 1918

8/8/K5B1/4p3/4P3/3k2N1/N4Q2/8

#2

6 + 2

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Qe1?
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kc2!
    • 1.Qb2?
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke3!
    • 1.Qd2+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd5#
      • 1...Kxd2!
    • 1.Qf3+?
      • 1...Kd2
        • 2.Qe2#
      • 1...Kc4
        • 2.Qc3#
      • 1...Kd4
        • 2.Qc3#
      • 1...Kc2!
  • Keys
    • 1.Sf5!
      • 1...Kc4
        • 2.Qc2#
      • 1...Kxe4
        • 2.Se7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
        • K(a);P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • K(a);OGATE,S_FLIGHT::QAR1(B)
        • K(a);OGATE,P-FLIGHT::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • K(a);S_FLIGHT,XP(D)::B(F)+S(C)
HTML5 logo

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).