MESON Chess Problem Database

Problem Display
PID: 231598 (2B5/2p4R/1pk2N2/1p6/1B6/1KN2r2/8/2R5 w - - 0 1)

Rehn, Gunnar

Vart Hem, 1927

2B5/2p4R/1pk2N2/1p6/1B6/1KN2r2/8/2R5

#2

7 + 5

6490 yacpdb 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Sd1#
    • 1...Rf2
      • 2.Se2#
    • 1...Rxc3+
      • 2.Rxc3#
    • 1...Rf4
      • 2.Sce4#
    • 1...Rf5
      • 2.Scd5#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Se5#
        • 2.Sb8#
      • 1...Re3
        • 2.Sb8#
      • 1...Rf5
        • 2.Sb8#
      • 1...Rxc3+!
  • Keys
    • 1.Rh6!
      • 1...Rxc3+
        • 2.Rxc3#
      • 1...Rxf6
        • 2.Rxf6#
      • 1...Rd3
        • 2.Sd5#
      • 1...Rf1
        • 2.Sd1#
      • 1...Rf2
        • 2.Se2#
      • 1...Re3
        • 2.Se4#
      • 1...Rg3
        • 2.Sg4#
      • 1...Rh3
        • 2.Sh5#
      • 1...Rf4
        • 2.Sce4#
      • 1...Rf5
        • 2.Scd5#

This anticipates 197774(1980)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINS(C)::R(A)+S(C)
    • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::R(A),XR(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::S(E)
        • R(a);N_PINS(C)::S(E)
      • Refutation
        • R(a);CHECK,P_SPINR(a),XS(C)
  • Actual
    • R(F);
    • Vars
      • R(a);CHECK,OGATE,P_SPINR(a),XS(C)::R(A),XR(a)
      • R(a);N_PINS(C),OGATE,P_SPINR(a),XS(E)::R(F),XR(a)
      • R(a);N_GUARD::R(F)+S(E)
      • R(a);N_PINS(C)::R(A)+S(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).