MESON Chess Problem Database

Problem Display
PID: 48930 (3R4/r3pK2/Q5Np/3BB1Pq/p1b5/3k1p1R/1nprpP2/3nb1N1 w - - 0 1)

Ellerman, Arnoldo

L'Echiquier, 1933

3R4/r3pK2/Q5Np/3BB1Pq/p1b5/3k1p1R/1nprpP2/3nb1N1

#2

10 + 14

5137 1001 Problemas 1945

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg6+
      • 2.Qxg6#
    • 1...Qxh3
      • 2.Sf4#
    • 1...e6+
      • 2.Bb7#
  • Tries
    • 1.Rxf3+?
      • 1...Se3
        • 2.Rxe3#
      • 1...Qxf3+!
  • Keys
    • 1.Sxf3!
      • threat
        • 2.Sxe1#
      • 1...Qxf3+
        • 2.Sf4#
      • 1...Qxg6+
        • 2.Qxg6#
      • 1...e6+
        • 2.Bb7#
      • 1...Bxf2
        • 2.Se1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(k);CHECK,OGATE,XS(H)::QAB(G),XQ(k)
    • Q(k);N_PINS(H),N_SPINP(h),XR(C)::S(H)
    • P(n);CHECK,N_PINB(D)::R(J)+B(D)
  • Tries
    • Try
      • R(C);CHECK,XP(h)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::R1(C),XS(a)
      • Refutation
        • Q(k);CHECK,N_PINS(H),XR(C)
  • Actual
    • S(A);XP(h)
    • Threat
      • R(C)+S(A),DCHECK,XB(b)
    • Vars
      • Q(k);CHECK,N_PINS(H),P_SPINQ(k),XS(A)::S(H)
      • Q(k);CHECK,OGATE,XS(H)::QAB(G),XQ(k)
      • P(n);CHECK,N_PINB(D)::R(J)+B(D)
      • B(b);XP(B)::R(C)+S(A),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).