MESON Chess Problem Database

Problem Display
PID: 89873 (QB6/6p1/K1P2P1b/1NR2p1r/3pk3/2p1p3/4n3/4Nb2 w - - 0 1)

Kneffel, E Heinz

Die Schwalbe, 1949

QB6/6p1/K1P2P1b/1NR2p1r/3pk3/2p1p3/4n3/4Nb2

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.c7#
    • 1...Sf4
      • 2.Re5#
    • 1...f4
      • 2.Sd6#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sd6#
        • 2.c7#
      • 1...f4
        • 2.Sd6#
      • 1...Sc1
        • 2.c7#
      • 1...Sg1
        • 2.c7#
      • 1...Sg3
        • 2.c7#
      • 1...Sf4!
    • 1.Bd6?
      • threat
        • 2.Qe8#
        • 2.c7#
      • 1...Bf4
        • 2.c7#
      • 1...Sf4
        • 2.Re5#
      • 1...f4!
    • 1.Bc7?
      • threat
        • 2.Qe8#
      • 1...Sf4
        • 2.Re5#
      • 1...f4
        • 2.Sd6#
      • 1...Bf4!
    • 1.Qa7?
      • threat
        • 2.Qe7#
      • 1...Sf4
        • 2.Re5#
      • 1...f4
        • 2.Sd6#
      • 1...Bf4!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qe7#
      • 1...Bf4
        • 2.c7#
      • 1...Sf4
        • 2.Re5#
      • 1...f4
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(i);SBLOCK::QAB(G)+P(E)
    • S(b);P_PINS(B),SBLOCK::R1(C)
    • P(g);SBLOCK::S(B)
  • Tries
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);::S(B)
        • S(b);P_PINS(B)::QAB(G)+P(E)
      • Refutation
        • S(b);P_PINS(B)
    • Try
      • B(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(i);::QAB(G)+P(E)
        • S(b);P_PINS(B),SBLOCK::R1(C)
      • Refutation
        • P(g);
    • Try
      • B(H);
      • Threat
        • QAR(G)
      • Vars
        • S(b);P_PINS(B),SBLOCK::R1(C)
        • P(g);SBLOCK::S(B)
      • Refutation
        • B(i);
    • Try
      • Q(G);
      • Threat
        • QAR(G)
      • Vars
        • S(b);P_PINS(B),SBLOCK::R1(C)
        • P(g);SBLOCK::S(B)
      • Refutation
        • B(i);
  • Actual
    • Q(G);
    • Threat
      • QAR(G)
    • Vars
      • B(i);SBLOCK::QAB(G)+P(E)
      • S(b);P_PINS(B),SBLOCK::R1(C)
      • P(g);SBLOCK::S(B)
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).