MESON Chess Problem Database

Problem Display
PID: 189551 (1qN3B1/1Np3P1/r3P1QK/1P1k2PR/3n2p1/bPr4p/2P5/4R1nb w - - 0 1)

Palkoska, Emil

Tidskrift for Schack, 1911

1qN3B1/1Np3P1/r3P1QK/1P1k2PR/3n2p1/bPr4p/2P5/4R1nb

#2

13 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.c4#
    • 1...Rf3
      • 2.Qe4#
      • 2.c4#
    • 1...Rg3
      • 2.c4#
    • 1...Rc5
      • 2.Se7#
    • 1...Rd6
      • 2.Se7#
    • 1...Be4
      • 2.Qxe4#
    • 1...Bc1
      • 2.Se7#
    • 1...Bb2
      • 2.Se7#
    • 1...Be7
      • 2.Sxe7#
    • 1...Sgf3
      • 2.Qe4#
    • 1...Sdf3
      • 2.Qe4#
    • 1...c5
      • 2.Se7#
  • Keys
    • 1.Qd3!
      • threat
        • 2.g6#
      • 1...Rxd3
        • 2.c4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bc1
        • 2.Se7#
      • 1...Bd6
        • 2.e7#
      • 1...Be7
        • 2.Sxe7#
      • 1...Sf3
        • 2.Qe4#
      • 1...c5
        • 2.Se7#
      • 1...c6
        • 2.e7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(d);OGATE::P(B)
    • R(d);S_CUTB(c)::S(L)
    • R(i);S_CUTB(c)::S(L)
    • B(b);N_GUARD::QAB1(H),XB(b)
    • B(c);N_GUARD,P_PINP(E)::S(L)
    • B(c);N_GUARD::S(L)
    • B(c);N_GUARD::S(L),XB(c)
    • S(a);S_CUTB(b)::QAB1(H)
    • S(f);S_CUTB(b)::QAB1(H)
    • P(j);S_CUTB(c)::S(L)
  • Actual
    • Q(H);P_PINS(f),P_SPINP(G)
    • Threat
      • R(F)+P(E)
    • Vars
      • R(d);N_SPINS(f),OGATE,XQ(H)::P(B)
      • B(b);N_GUARD::QAB1(H),XB(b)
      • B(c);N_GUARD,N_PINP(G),P_PINP(E)::S(L)
      • B(c);N_PINP(G)::B(M)+P(G)
      • B(c);N_GUARD::S(L),XB(c)
      • S(a);S_CUTB(b)::QAB1(H)
      • P(j);S_CUTB(c)::S(L)
      • P(j);N_PINP(G)::B(M)+P(G)
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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).