MESON Chess Problem Database

Problem Display
PID: 254498 (N1kn4/5n2/2P1R3/K1N3B1/pQp3R1/3q3B/8/8 w - - 0 1)

Lipton, Michael

Die Schwalbe, 1966

N1kn4/5n2/2P1R3/K1N3B1/pQp3R1/3q3B/8/8

#2

9 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qd7
      • 2.cxd7#
    • 1...Sxc6+
      • 2.Rxc6#
    • 1...Sxe6
      • 2.Qb7#
    • 1...Sb7+
      • 2.Qxb7#
  • Tries
    • 1.Sb6+?
      • 1...Kc7
        • 2.Sa6#
      • 1...Kb8!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qb7#
      • 1...Qb1
        • 2.Rge4#
      • 1...Qd2
        • 2.Rd4#
      • 1...Qb3
        • 2.Rg3#
      • 1...Qc3
        • 2.Rg3#
      • 1...Qd7
        • 2.cxd7#
      • 1...Sd6
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(a);OGATE::P(G),XQ(a)
    • S(f);CHECK,OGATE,XP(G)::R(H),XS(f)
    • S(f);N_GUARD,XR(H)::QAB1(B)
    • S(f);CHECK,N_GUARD::QAB1(B),XS(f)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(e);P-FLIGHT::S(E)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • R(H);P_PINS(f)
    • Threat
      • QAB1(B)
    • Vars
      • Q(a);N_GUARD::B(A)+R(C)
      • Q(a);N_GUARD,P_PINQ(B)::B(A)+R(C)
      • Q(a);OGATE::P(G),XQ(a)
      • S(d);N_GUARD,S_CUTQ(a)::R1(H),XS(f)
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).