MESON Chess Problem Database

Problem Display
PID: 175175 (7Q/B2pK3/2pp4/3kpbR1/8/4R1P1/2P5/8 w - - 0 1)

Zarbach, John

Philadelphia Times, 1902

7Q/B2pK3/2pp4/3kpbR1/8/4R1P1/2P5/8

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc2
      • 2.Qg8#
    • 1...Bd3
      • 2.Qg8#
    • 1...Be4
      • 2.Qg8#
    • 1...e4
      • 2.Qd4#
  • Tries
    • 1.Rg4?
      • threat
        • 2.c4#
      • 1...Bxc2
        • 2.Qg8#
      • 1...Be4
        • 2.Qg8#
      • 1...e4
        • 2.Qd4#
      • 1...c5
        • 2.Qa8#
      • 1...Bd3
        • 2.Rxd3#
        • 2.Qg8#
      • 1...Bxg4!
    • 1.Qh1+?
      • 1...Be4
        • 2.Qxe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Kc4!
  • Keys
    • 1.Re4!
      • 1...Kxe4
        • 2.Qh1#
      • 1...Bxe4
        • 2.Qg8#
      • 1...c5
        • 2.Qa8#
      • 1...Bh3
        • 2.Rd4#
      • 1...Bg4
        • 2.Rd4#
      • 1...Be6
        • 2.Rd4#
      • 1...Bg6
        • 2.Rd4#
      • 1...Bh7
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD,P_SPINP(b),XP(A)::QAB(G)
    • B(c);N_GUARD,P_SPINP(b)::QAB(G)
    • P(b);OGATE,P_SPINB(c)::QAR1(G)
  • Tries
    • Try
      • R(D);
      • Threat
        • P(A)
      • Vars
        • B(c);N_GUARD,XP(A)::QAB(G)
        • B(c);N_GUARD::QAB(G)
        • P(b);OGATE::QAR1(G)
        • P(d);OGATEB::QAB(G)
      • Refutation
        • B(c);XR(D)
    • Try
      • Q(G);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c),P_SPINP(b)::QAB1(G),XB(c)
        • P(b);P_SPINB(c),P_SPINP(b)::QAB1(G),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(B);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(B)::QAB(G)
      • B(c);N_GUARD,P_SPINP(b),SBLOCK,XR(B)::QAB(G)
      • P(d);OGATEB::QAB(G)
      • B(c);P_SPINP(b)::R1(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).