MESON Chess Problem Database

Problem Display
PID: 250070 (1q5Q/1n6/1P1p3R/1b1k2p1/p1N5/BB1N1P2/4R3/4K3 w - - 0 1)

Gross, Izidor

Schackvarlden, 1927

1q5Q/1n6/1P1p3R/1b1k2p1/p1N5/BB1N1P2/4R3/4K3

#2

10 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Se3#
    • 1...Sc5
      • 2.Sb4#
  • Tries
    • 1.Sa5+?
      • 1...Bc4
        • 2.Bxc4#
      • 1...axb3!
    • 1.Qc3?
      • threat
        • 2.Se3#
      • 1...Bxc4
        • 2.Qxc4#
      • 1...Sc5
        • 2.Sb4#
      • 1...Kc6!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Sde5#
        • 2.Sce5#
      • 1...Kxd4!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Sde5#
      • 1...Kc6
        • 2.Sde5#
      • 1...Sc5
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(b);SBLOCK::B(D)+S(G),DCHECK
    • S(f);SBLOCK::S(E)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::B(D),XB(b)
      • Refutation
        • P(a);XB(D)
    • Try
      • Q(J);
      • Threat
        • B(D)+S(G),DCHECK
      • Vars
        • B(b);OGATE,P_SPINB(b),XS(G)::QAB1(J),XB(b)
        • S(f);SBLOCK::S(E)
      • Refutation
        • K(c);P_SPINP(e),S_FLIGHT
    • Try
      • Q(J);CHECK
      • Refutation
        • K(c);P-FLIGHT,XQ(J)
  • Actual
    • R(B);
    • Threat
      • R(B)+S(E)
    • Vars
      • K(c);P_SPINP(e),S_FLIGHT::S(E)
      • S(f);SBLOCK::R(B)+S(E),DCHECK
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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).