MESON Chess Problem Database

Problem Display
PID: 240241 (5N2/4K3/1BBpQ3/2p2p2/3k4/1p2r2p/1NnP3b/3RRb1q w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd KNSB, 1932

5N2/4K3/1BBpQ3/2p2p2/3k4/1p2r2p/1NnP3b/3RRb1q

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Qc4#
    • 1...Rf3
      • 2.Qd5#
    • 1...Rg3
      • 2.Qf6#
    • 1...Rxe6+
      • 2.Sxe6#
    • 1...Sa1
      • 2.Qxe3#
    • 1...Sxe1
      • 2.Qxe3#
    • 1...Sa3
      • 2.Qxe3#
    • 1...Sb4
      • 2.Qxe3#
  • Keys
    • 1.Ba5!
      • threat
        • 2.dxe3#
      • 1...Rxe6+
        • 2.Sxe6#
      • 1...Rxe1
        • 2.Bc3#
      • 1...c4
        • 2.Bb6#
      • 1...Re2
        • 2.Bc3#
      • 1...Rc3
        • 2.Bxc3#
        • 2.dxc3#
      • 1...Rd3
        • 2.Qc4#
      • 1...Rf3
        • 2.Qd5#
      • 1...Rg3
        • 2.Qf6#
      • 1...Re4
        • 2.Bc3#
      • 1...Re5
        • 2.Bc3#
      • 1...Bd3
        • 2.Bc3#
      • 1...Sb4
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(f);N_PINQ(G)::QAR1(G)
    • R(f);N_PINQ(G)::QAB(G)
    • R(f);CHECK,XQ(G)::S(I),XR(f)
    • S(c);N_GUARD::QAB1(G),XR(f)
    • S(c);N_GUARD,XR(B)::QAB1(G),XR(f)
  • Actual
    • B(E);N_PINP(i)
    • Threat
      • R(A)+P(D)DCHECK,XR(f)
    • Vars
      • R(f);CHECK,XQ(G)::S(I),XR(f)
      • R(f);N_GUARD,XR(B)::B(E)
      • P(i);OGATEB::B(E)
      • R(f);N_GUARD::B(E)
      • R(f);N_PINQ(G)::QAR1(G)
      • R(f);N_PINQ(G)::QAB(G)
      • B(a);S_CUTR(f)::B(E)
      • S(c);N_GUARD::QAB1(G),XR(f)
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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).