MESON Chess Problem Database

Problem Display
PID: 138615 (1b2Q2B/pr3p2/4b2n/1p1P1Rpn/4k1p1/8/K3NP2/4N3 w - - 0 1)

Ellerman, Arnoldo

Western Morning News and Mercury, 1927

1b2Q2B/pr3p2/4b2n/1p1P1Rpn/4k1p1/8/K3NP2/4N3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Re5#
    • 1...Be5
      • 2.Rxe5#
    • 1...Sf4
      • 2.Sg3#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Qd3#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Kxf5
        • 2.Qd3#
      • 1...Sf4
        • 2.Sg3#
      • 1...Rxb5!
    • 1.Qxe6+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...fxe6!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qc2#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Kxf5
        • 2.Qc2#
      • 1...Bxf5
        • 2.d6#
      • 1...Sxf5
        • 2.dxe6#
      • 1...Rc7
        • 2.Re5#
      • 1...Be5
        • 2.Rxe5#
      • 1...Sf4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(i);S_CUTB(k)::R1(F)
    • B(k);N_GUARD,N_SPINB(f)::R1(F),XB(k)
    • S(e);N_GUARD,S_CUTB(k)::S(C)
  • Tries
    • Try
      • Q(G);N_PINB(f),XP(c)
      • Threat
        • QAB1(G)
      • Vars
        • B(f);CHECK,OGATE,XP(E)::QAB1(G),XB(f)
        • K(a);S_FLIGHT,XR(F)::QAB(G)
        • S(e);N_GUARD,S_CUTB(k)::S(C)
      • Refutation
        • R(i);XQ(G)
    • Try
      • Q(G);CHECK,N_SPINP(E),XB(f)
      • Refutation
        • P(j);XQ(G)
  • Actual
    • Q(G);N_PINB(f)
    • Threat
      • QAB(G)
    • Vars
      • B(f);CHECK,OGATE,P_SPINB(f),XP(E)::QAB1(G),XB(f)
      • K(a);S_FLIGHT,XR(F)::QAB(G)
      • B(f);N_PINP(E),SBLOCK,XR(F)::QAB(G)+P(E)
      • S(g);SBLOCK,XR(F)::QAB(G)+P(E),XB(f)
      • R(i);S_CUTB(k)::R1(F)
      • B(k);N_GUARD::R1(F),XB(k)
      • S(e);N_GUARD,S_CUTB(k)::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).