MESON Chess Problem Database

Problem Display
PID: 22158 (8/3p4/Q2P1Rp1/K2Bkrrb/1Pp1pRp1/2N1p1N1/1B2P2P/8 w - - 0 1)

Lipton, Michael

1st HM., Problem (Zagreb), 1962

8/3p4/Q2P1Rp1/K2Bkrrb/1Pp1pRp1/2N1p1N1/1B2P2P/8

#2

12 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rxe4#
    • 1...Kxf6
      • 2.Scxe4#
    • 1...Rxf6
      • 2.Rxe4#
  • Tries
    • 1.Bg8?
      • 1...Kd4+
        • 2.Sb5#
      • 1...Kxf4+
        • 2.Sd5#
      • 1...Kxf6+
        • 2.Sd5#
      • 1...Rxf6
        • 2.Rxe4#
      • 1...Rxf4!
    • 1.Re6+?
      • 1...Kd4
        • 2.Rfxe4#
        • 2.Rexe4#
        • 2.Qxc4#
        • 2.Qb6#
        • 2.Qa7#
      • 1...Kxf4
        • 2.Rxe4#
      • 1...dxe6!
    • 1.Qxc4?
      • 1...Kxf4
        • 2.Qxe4#
      • 1...Kxf6
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Sa4#
        • 2.Scxe4#
        • 2.Sb5#
        • 2.Qd4#
      • 1...Rxf4
        • 2.Sb1#
        • 2.Sd1#
        • 2.Sa2#
        • 2.Sa4#
        • 2.Scxe4#
        • 2.Sb5#
      • 1...Rxf6!
  • Keys
    • 1.Bxc4!
      • threat
        • 2.Sd5#
      • 1...Kd4+
        • 2.Sd5#
      • 1...Kxf4+
        • 2.Sd5#
      • 1...Kxf6+
        • 2.Sb5#
      • 1...Rxf6
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);P_PINB(I),P_SPINP(c),S_FLIGHT::R1(G),XP(c)
    • K(e);P_PINB(I),P_SPINR(f),S_FLIGHT,XR(L)::B(A)+S(D),DCHECK,XP(c)
    • R(f);SBLOCK,XR(L)::R1(G),XP(c)
  • Tries
    • Try
      • B(I);
      • Vars
        • K(e);CHECK,P_SPINP(c),S_FLIGHT::B(A)+S(D),DCHECK
        • K(e);CHECK,P_SPINR(f),S_FLIGHT,XR(G)::S(D)
        • K(e);CHECK,P_SPINR(f),S_FLIGHT,XR(L)::B(A)+S(D),DCHECK
        • R(f);SBLOCK,XR(L)::R1(G),XP(c)
      • Refutation
        • R(f);XR(G)
    • Try
      • R(L);CHECK
      • Vars
        • K(e);OGATE,P_PINB(I),S_FLIGHT,XR(G)::R1(L),XP(c)
      • Refutation
        • P(j);XR(L)
    • Try
      • Q(J);XP(b)
      • Vars
        • K(e);P_PINB(I),P_SPINP(c),P_SPINR(f),S_FLIGHT,XR(G)::QAR1(J),XP(c)
      • Refutation
        • R(f);XR(L)
  • Actual
    • B(I);XP(b)
    • Threat
      • B(A)+S(D)
    • Vars
      • K(e);CHECK,P_SPINP(c),S_FLIGHT::B(A)+S(D)
      • K(e);CHECK,P_SPINR(f),S_FLIGHT,XR(G)::S(D)
      • K(e);CHECK,P_SPINR(f),S_FLIGHT,XR(L)::B(A)+S(D)
      • R(f);SBLOCK,XR(L)::R1(G),XP(c)
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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).