MESON Chess Problem Database

Problem Display
PID: 91218 (4BQ2/6B1/r1PK2Pq/2p3pN/2N1k3/r5P1/2PR4/3n1n2 w - - 0 1)

Schneider, Michael

Die Schwalbe, 1968

4BQ2/6B1/r1PK2Pq/2p3pN/2N1k3/r5P1/2PR4/3n1n2

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6+
      • 2.Bxg6#
    • 1...Rd3+
      • 2.cxd3#
    • 1...Rxc6+
      • 2.Bxc6#
  • Tries
    • 1.Sf6+?
      • 1...Kf5
        • 2.Rd5#
      • 1...Kf3!
  • Keys
    • 1.Qe7+!
      • 1...Kf3
        • 2.Qe2#
      • 1...Kf5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(h);CHECK,OGATE,XP(H)::B(J),XQ(h)
    • R(c);CHECK,OGATE::P(A),XR(c)
    • R(g);CHECK,OGATE,P_PINP(H),XP(F)::B(J),XR(g)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);S_FLIGHT::R(B)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • Q(K);CHECK
    • Vars
      • K(d);OGATE,S_FLIGHT::QAB1(K)
      • K(d);S_FLIGHT::QAB1(K)
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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).