MESON Chess Problem Database

Problem Display
PID: 11002 (4R3/6B1/3p4/3P1RN1/1Nr1P3/2p1kP2/Q2n4/1qb2BK1 w - - 0 1)

Kish, Alexander

American Chess Bulletin, 1936

4R3/6B1/3p4/3P1RN1/1Nr1P3/2p1kP2/Q2n4/1qb2BK1

#2

11 + 7

5088 How to Solve Chess Problems 1945
5064 100 Years of the American Two-move Chess Problem 1962
5066 Classic Chess Problems by Pioneer Composers 1970

SOLUTION

  • SOUND
  • Sets
    • 1...Qc2
      • 2.Sxc2#
    • 1...Qxe4
      • 2.Sc2#
    • 1...Qa1
      • 2.Sc2#
    • 1...Rxe4
      • 2.Qa7#
    • 1...Sxf1
      • 2.Qf2#
    • 1...Sb3
      • 2.Qe2#
      • 2.Qf2#
    • 1...Sxf3+
      • 2.Rxf3#
    • 1...Sxe4
      • 2.Qe2#
      • 2.Qf2#
  • Tries
    • 1.Qa7+?
      • 1...Rd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...Rc5!
  • Keys
    • 1.Bh6!
      • threat
        • 2.Se6#
      • 1...Sxf3+
        • 2.Sxf3#
      • 1...Kd4
        • 2.Se6#
      • 1...Qxe4
        • 2.Sc2#
      • 1...Rxe4
        • 2.Qa7#
      • 1...Sxe4
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::S(E),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XP(F)::S(E)
    • Q(a);N_GUARD::S(E)
    • R(f);N_GUARD,P_SPINR(f),XP(F)::QAB(C)
    • S(c);OGATE,XB(A)::QAB1(C)
    • S(c);CHECK,OGATE,XP(D)::R1(H),XS(c)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • R(f);P_SPINR(f)
  • Actual
    • B(J);
    • Threat
      • B(J)+S(I)
    • Vars
      • S(c);CHECK,XP(D)::B(J)+S(I),XS(c)
      • K(e);S_FLIGHT::S(I)
      • Q(a);N_GUARD,P_SPINQ(a),XP(F)::S(E)
      • R(f);N_GUARD,P_SPINR(f),XP(F)::QAB(C)
      • S(c);OGATE,P_SPINS(c),XP(F)::QAB1(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).