MESON Chess Problem Database

Problem Display
PID: 90270 (8/8/8/1p3p2/1Rp1pk2/1PK2N1R/3P1N2/2B5 w - - 0 1)

Zickermann, Albert

2nd Prize, Die Schwalbe, 1940

8/8/8/1p3p2/1Rp1pk2/1PK2N1R/3P1N2/2B5

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...cxb3
      • 2.d3#
    • 1...exf3
      • 2.d4#
    • 1...e3
      • 2.dxe3#
  • Tries
    • 1.Kc2?
      • 1...exf3
        • 2.d4#
      • 1...c3
        • 2.dxc3#
        • 2.d3#
      • 1...e3
        • 2.dxe3#
      • 1...cxb3+!
    • 1.Rxb5?
      • 1...exf3
        • 2.d3#
        • 2.d4#
      • 1...e3
        • 2.dxe3#
      • 1...cxb3!
    • 1.bxc4?
      • 1...exf3
        • 2.d4#
      • 1...e3
        • 2.dxe3#
        • 2.cxb5#
        • 2.c5#
      • 1...bxc4!
  • Keys
    • 1.Kb2!
      • 1...c3+
        • 2.dxc3#
      • 1...cxb3
        • 2.d3#
      • 1...exf3
        • 2.d4#
      • 1...e3
        • 2.dxe3#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(a);P_SPINP(b),XP(D)::B(A)+P(B)
    • P(b);N_GUARD,P_SPINP(a),XS(F)::B(A)+P(B)
    • P(b);OGATE,P_SPINP(a)::P(B),XP(b)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Vars
        • P(b);N_GUARD,P_SPINP(a),XS(F)::B(A)+P(B)
        • P(b);OGATE,P_SPINP(a)::P(B),XP(b)
      • Refutation
        • P(a);CHECK,P_SPINP(b),XP(D)
    • Try
      • R(H);XP(d)
      • Vars
        • P(b);OGATE::P(B),XP(b)
      • Refutation
        • P(a);XP(D)
    • Try
      • P(D);XP(a)
      • Vars
        • P(b);N_GUARD,XS(F)::B(A)+P(B)
      • Refutation
        • P(d);XP(D)
  • Actual
    • K(E);S_FLIGHT
    • Vars
      • P(a);CHECK,OGATE,P_SPINP(b)::B(A)+P(B),XP(a)
      • P(a);P_SPINP(b),XP(D)::B(A)+P(B)
      • P(b);N_GUARD,P_SPINP(a),XS(F)::B(A)+P(B)
      • P(b);OGATE,P_SPINP(a)::P(B),XP(b)
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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).