MESON Chess Problem Database

Problem Display
PID: 100558 (1r3b2/1bB2K2/3p1p2/1p2N2R/1P1kP3/4p2p/Q3PP2/3N1r1q w - - 0 1)

Retter, Yosef

2nd Prize, Israel Ring Ty., 1985

1r3b2/1bB2K2/3p1p2/1p2N2R/1P1kP3/4p2p/Q3PP2/3N1r1q

#2

10 + 11

721 Variantim 1988
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Bb6#
    • 1...Bxe4
      • 2.fxe3#
    • 1...Bd5+
      • 2.Qxd5#
    • 1...Ba6
      • 2.Qd5#
    • 1...Bc8
      • 2.Qd5#
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qa1#
        • 2.Qb2#
      • 1...Bd5+
        • 2.Qxd5#
      • 1...Kxe5
        • 2.Qa1#
        • 2.Qb2#
      • 1...Qxe4
        • 2.Sf3#
      • 1...Rxd1
        • 2.Qb2#
      • 1...Bxe4
        • 2.Sc6#
      • 1...dxe5
        • 2.fxe3#
      • 1...fxe5
        • 2.Bb6#
      • 1...Ra8
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(b);SBLOCK,XP(F)::B(I)
    • B(i);SBLOCK,XP(F)::P(D),XP(c)
    • B(i);CHECK,N_GUARD::QAR1(B),XB(i)
    • B(i);N_GUARD::QAR1(B)
  • Actual
    • R(H);
    • Threat
      • DUALS(2)
    • Vars
      • B(i);CHECK,N_GUARD::QAR1(B),XB(i)
      • Q(b);N_GUARD,P_SPINQ(b),XP(F)::S(G)
      • R(a);XS(A)::QAB(B)
      • B(i);N_GUARD,P_SPINB(i),XP(F)::S(G)
      • P(g);XS(G)::P(D),XP(c)
      • P(h);P_PINP(D),SBLOCK,XS(G)::B(I)
      • R(j);::QAB(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).