MESON Chess Problem Database

Problem Display
PID: 90780 (2R3K1/8/N1bp2Q1/p2kp3/6pR/7P/qbN2pr1/5BB1 w - - 0 1)

Hannelius, Jan Ingvar

Die Schwalbe, 1949

2R3K1/8/N1bp2Q1/p2kp3/6pR/7P/qbN2pr1/5BB1

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...gxh3
      • 2.Se3#
    • 1...g3
      • 2.Se3#
      • 2.Qf7#
  • Tries
    • 1.Bxg2+?
      • 1...e4
        • 2.Qxe4#
      • 1...Kc4!
    • 1.Rxg4?
      • threat
        • 2.Se3#
        • 2.Qf7#
      • 1...fxg1Q
        • 2.Qf7#
      • 1...fxg1B
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#
      • 1...Qb3
        • 2.Qf7#
      • 1...Qa3
        • 2.Bc4#
        • 2.Qf7#
      • 1...Rg3
        • 2.Qf7#
      • 1...Bc1
        • 2.Qf7#
      • 1...Bd4
        • 2.Qf7#
      • 1...Bd7
        • 2.Se3#
      • 1...Be8
        • 2.Se3#
      • 1...Rxg4!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qf7#
      • 1...gxh3
        • 2.Se3#
      • 1...e4
        • 2.Qxe4#
      • 1...f1Q
        • 2.Sc7#
      • 1...f1R
        • 2.Sc7#
      • 1...Bd7
        • 2.Be4#
      • 1...Be8
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • P(e);P_PINQ(G),XP(D)::S(C)
  • Tries
    • Try
      • B(A);CHECK,XR(d)
      • Vars
        • P(h);P_SPINP(h)::QAB1(G),XP(h)
      • Refutation
        • K(g);P_SPINB(i),P_SPINP(e),S_FLIGHT
    • Try
      • R(E);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XB(B)::QAB(G)
        • P(h);::QAB1(G),XP(h)
        • Q(a);::QAB(G)
        • R(d);::QAB(G)
        • B(b);::QAB(G)
        • B(i);::S(C)
      • Refutation
        • R(d);P_PINQ(G),XR(E)
  • Actual
    • B(A);
    • Threat
      • QAB(G)
    • Vars
      • P(e);P_PINQ(G),XP(D)::S(C)
      • P(h);::QAB1(G),XP(h)
      • P(c);::S(F)
      • B(i);::B(A)
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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).