MESON Chess Problem Database

Problem Display
PID: 22218 (nr2RnK1/bp1k1P1R/1p2pP2/1P6/8/7B/7Q/8 w - - 0 1)

Haring, Jacobus

64 Shakhmatnoe obozrenie, 1976

nr2RnK1/bp1k1P1R/1p2pP2/1P6/8/7B/7Q/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Sg6
      • 2.Bxe6#
    • 1...Sxh7
      • 2.Bxe6#
  • Tries
    • 1.Kxf8?
      • threat
        • 2.Bxe6#
      • 1...Rxe8+
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Sc7!
    • 1.Qxb8?
      • threat
        • 2.Re7#
        • 2.Rd8#
        • 2.Qd8#
      • 1...Sc7
        • 2.Rd8#
        • 2.Qd8#
      • 1...Sg6
        • 2.Bxe6#
        • 2.Rd8#
        • 2.Qd8#
        • 2.f8S#
      • 1...Bxb8!
  • Keys
    • 1.Rxe6!
      • 1...Sxe6+
        • 2.f8Q#
        • 2.f8R#
      • 1...Sg6+
        • 2.Re8#
      • 1...Sxh7+
        • 2.Re8#
      • 1...Kc8
        • 2.Re8#
      • 1...Kd8
        • 2.Re8#
      • 1...Rc8
        • 2.Qd6#
      • 1...Rd8
        • 2.Re7#
      • 1...Re8
        • 2.fxe8Q#
      • 1...Sc7
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(h);N_GUARD,P_PINR(G)::B(B),XP(b)
    • S(h);N_GUARD,P_PINR(G),XR(F)::B(B),XP(b)
  • Tries
    • Try
      • K(H);P-FLIGHT,P_SPINR(G),XS(h)
      • Threat
        • B(B),XP(b)
      • Vars
        • R(g);CHECK,OGATE,XR(G)::PXR(g)=Q
      • Refutation
        • S(f);
    • Try
      • Q(A);XR(g)
      • Threat
        • DUALS(3)
      • Refutation
        • B(c);XQ(A)
  • Actual
    • R(G);XP(b)
    • Vars
      • S(h);CHECK,OGATE,P_SPINS(h),XR(G)::P=Q
      • S(h);CHECK,N_GUARD::B(B)+R(G)
      • S(h);CHECK,N_GUARD,XR(F)::B(B)+R(G)
      • K(e);S_FLIGHT::B(B)+R(G),DCHECK
      • K(e);P-FLIGHT::R1(G)
      • R(g);SBLOCK::QAR1(A)
      • R(g);SBLOCK::B(B)+R(G),DCHECK
      • R(g);OGATE::PXR(g)=Q
      • S(f);SBLOCK::B(B)+R(G),DCHECK
HTML5 logo

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).