MESON Chess Problem Database

Problem Display
PID: 176031 (5b2/5P2/6R1/2Pkp1pQ/2R1p3/K7/B3Prn1/6B1 w - - 0 1)

Emil, Moses

Schach-Echo, 1939

5b2/5P2/6R1/2Pkp1pQ/2R1p3/K7/B3Prn1/6B1

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Ra4#
      • 2.Rb4#
    • 1...Rxe2
      • 2.Rc2#
    • 1...Rf3+
      • 2.Rc3#
    • 1...Rf4
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Ra4#
      • 2.Rb4#
    • 1...Rf5
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Ra4#
      • 2.Rb4#
    • 1...Rxf7
      • 2.Rc1#
      • 2.Rc2#
      • 2.Rc3#
      • 2.Ra4#
      • 2.Rb4#
    • 1...Bxc5+
      • 2.Rb4#
    • 1...Bd6
      • 2.Rxd6#
    • 1...Bh6
      • 2.Rd6#
    • 1...Bg7
      • 2.Rd6#
  • Tries
    • 1.Rd4+?
      • 1...Kxc5
        • 2.Rd5#
      • 1...Kxd4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qxe4#
      • 1...Rxf3+
        • 2.Rc3#
      • 1...Bxc5+
        • 2.Rb4#
      • 1...Rxe2
        • 2.Rc2#
      • 1...exf3
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(a);XP(C)::B(B)+R(E)
    • R(a);CHECK::B(B)+R(E)
    • B(g);CHECK,SBLOCK,XP(F)::B(B)+R(E)
    • B(g);N_GUARD::R1(H),XB(g)
    • B(g);N_GUARD,N_PINP(F)::R1(H)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);P-FLIGHT,XP(F)::R1(E)
      • Refutation
        • K(d);P-FLIGHT,P_SPINR(a),XR(E)
  • Actual
    • Q(G);P_PINP(c)
    • Threat
      • QAB1(G),XP(c)
    • Vars
      • R(a);CHECK,N_SPINP(c),XQ(G)::B(B)+R(E)
      • B(g);CHECK,SBLOCK,XP(F)::B(B)+R(E)
      • R(a);XP(C)::B(B)+R(E)
      • P(c);N_SPINP(c),OGATE,XQ(G)::P(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).