MESON Chess Problem Database

Problem Display
PID: 236517 (4K3/4Q1b1/N1NpP1r1/pP1k4/n2p1P2/3P4/4b3/4R3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Rochade Europa, 2011

4K3/4Q1b1/N1NpP1r1/pP1k4/n2p1P2/3P4/4b3/4R3

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Sc7#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Qb7#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Sc5
        • 2.Sc7#
      • 1...Bxd3!
    • 1.Qf7?
      • threat
        • 2.Se7#
      • 1...Bf6
        • 2.e7#
      • 1...Bf8
        • 2.Qf5#
      • 1...Bxd3!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Sd8#
      • 1...Rxe6+
        • 2.Se7#
      • 1...Kxe6
        • 2.Qf7#
      • 1...Bxd3
        • 2.Sxa5#
      • 1...Sc5
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);SBLOCK::S(E)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB(H)
      • Vars
        • R(g);OGATE,P_PINQ(H),XP(G)::QAB1(H),XR(g)
        • S(b);SBLOCK::S(E)
      • Refutation
        • B(a);XP(B)
    • Try
      • Q(H);
      • Threat
        • S(F)
      • Vars
        • B(h);S_CUTR(g)::QAB(H)+P(G)
        • B(h);N_GUARD::QAR2(H)
      • Refutation
        • B(a);XP(B)
  • Actual
    • Q(H);
    • Threat
      • QAB(H)+S(F)
    • Vars
      • R(g);CHECK,SBLOCK,XP(G)::QAB(H)+S(F),DCHECK
      • K(e);OGATEB,P_SPINB(a),S_FLIGHT,XP(G)::QAB1(H)
      • B(a);XP(B)::QAB(H)+S(F),XP(d)
      • S(b);SBLOCK::S(E)
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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).