MESON Chess Problem Database

Problem Display
PID: 203225 (8/8/8/6p1/1N2kPK1/8/1n1Q4/8 w - - 0 1)

Pauly, Wolfgang

Schweizerische Schachzeitung, 1924

8/8/8/6p1/1N2kPK1/8/1n1Q4/8

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa4
      • 2.Qd3#
    • 1...Sc4
      • 2.Qd3#
    • 1...gxf4
      • 2.Qxf4#
  • Tries
    • 1.Kxg5?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Kf3!
    • 1.Qc3?
      • threat
        • 2.Qe5#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...gxf4!
    • 1.Qd6?
      • threat
        • 2.Qe5#
      • 1...gxf4
        • 2.Qxf4#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sc4
        • 2.Qd3#
      • 1...Ke3!
    • 1.fxg5?
      • threat
        • 2.Qf4#
      • 1...Ke5
        • 2.Qd5#
      • 1...Sd3!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Qd4#
      • 1...Sd3
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • S(a);N_GUARD::QAB1(A)
    • S(a);N_GUARD::QAB1(A),XS(a)
    • P(c);OGATE,XP(C)::QAR1(A),XP(c)
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(c)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • P(c);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • P(c);OGATE,XP(C)::QAR1(A),XP(c)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);XP(c)
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR1(A)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Threat
      • QAR1(A)
    • Vars
      • S(a);SBLOCK::QAB(A)
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).