MESON Chess Problem Database

Problem Display
PID: 194978 (b2qr3/n3b3/1p3N2/1Pk1B3/r1P2K2/2RQ4/2N5/5n2 w - - 0 1)

Ellerman, Arnoldo

Tijdschrift vd NSB, 1918

b2qr3/n3b3/1p3N2/1Pk1B3/r1P2K2/2RQ4/2N5/5n2

#2

8 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qc7
      • 2.Qd4#
    • 1...Qd4+
      • 2.Qxd4#
    • 1...Qd7
      • 2.Sxd7#
    • 1...Qb8
      • 2.Sd7#
      • 2.Qd4#
    • 1...Qc8
      • 2.Qd4#
    • 1...Rxc4+
      • 2.Qxc4#
    • 1...Bd6
      • 2.Qd4#
    • 1...Be4
      • 2.Sxe4#
    • 1...Bd5
      • 2.Qd4#
    • 1...Sc6
      • 2.Se4#
  • Tries
    • 1.Bd4+?
      • 1...Qxd4+
        • 2.Qxd4#
      • 1...Kd6!
    • 1.Qe3+?
      • 1...Qd4+
        • 2.Qxd4#
      • 1...Sxe3!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Bd4#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Bxf6
        • 2.Bd6#
      • 1...Sxb5
        • 2.Qxb5#
      • 1...Qc7
        • 2.Qd4#
      • 1...Qb8
        • 2.Qd4#
      • 1...Bd6
        • 2.Bxd6#
      • 1...Sc6
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD,P_PINB(G)::QAB1(C)
    • Q(h);CHECK,N_GUARD,N_PINP(D)::QAB1(C),XQ(h)
    • Q(h);N_GUARD::S(H),XQ(h)
    • Q(h);N_GUARD::QAB1(C)
    • R(b);CHECK,OGATE,P_SPINR(b),XP(D)::QAR1(C),XR(b)
    • B(f);P_PINB(G),S_CUTQ(h)::QAB1(C)
    • B(g);N_GUARD,N_PINP(D)::S(H),XB(g)
    • B(g);S_CUTQ(h)::QAB1(C)
    • S(e);S_CUTB(g)::S(H)
  • Tries
    • Try
      • B(G);CHECK,N_SPINP(D)
      • Vars
        • Q(h);CHECK,OGATE,XB(G)::QAB1(C),XQ(h)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • Q(h);CHECK,N_GUARD,N_PINP(D),P_SPINQ(h)::QAB1(C),XQ(h)
      • Refutation
        • S(a);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • B(G)
    • Vars
      • Q(h);XQ(C)::S(H),XQ(h)
      • B(f);N_GUARD,XS(H)::B(G)
      • S(e);OGATE,XP(F)::QAR1(C),XS(e)
      • Q(h);N_GUARD,P_PINB(G)::QAB1(C)
      • B(f);N_GUARD,P_PINB(G)::B(G),XB(f)
      • S(e);S_CUTB(g)::S(H)
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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).