MESON Chess Problem Database

Problem Display
PID: 101220 (8/4n3/8/b5NP/3P2kr/7p/K3P1qr/nQBB1NR1 w - - 0 1)

Seilberger, Johann Joseph Petrus Adrianus

Good Companions, 1920

8/4n3/8/b5NP/3P2kr/7p/K3P1qr/nQBB1NR1

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh5
      • 2.Qe4#
    • 1...Sc2
      • 2.e4#
  • Tries
    • 1.Sxh2+?
      • 1...Kxh5
        • 2.Qh7#
      • 1...Kg3!
    • 1.Rxg2+?
      • 1...Kxh5
        • 2.Qh7#
      • 1...hxg2
        • 2.e4#
      • 1...Rxg2!
  • Keys
    • 1.Sh7!
      • threat
        • 2.Sf6#
      • 1...Kxh5
        • 2.Sf6#
      • 1...Rxh5
        • 2.Qe4#
      • 1...Bd2
        • 2.e3#
      • 1...Sc2
        • 2.e4#
      • 1...Sd5
        • 2.Qg6#
      • 1...Sg8
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XP(J)::QAR2(A)
    • S(a);N_PINP(G)::B(C)+P(G)
  • Tries
    • Try
      • S(D);CHECK,XR(c)
      • Vars
        • K(e);N_SPINQ(b),S_FLIGHT,XP(J)::QAR2(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(E);CHECK,N_SPINP(G),XQ(b)
      • Vars
        • K(e);S_FLIGHT,XP(J)::QAR2(A)
        • P(d);XR(E)::B(C)+P(G)
      • Refutation
        • R(c);P_PINP(G),XR(E)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • K(e);N_SPINQ(b),S_FLIGHT,XP(J)::S(I)
      • R(f);SBLOCK,XP(J)::QAR2(A)
      • B(g);N_PINP(G)::B(C)+P(G)
      • S(a);N_PINP(G)::B(C)+P(G)
      • S(h);N_GUARD::QAR2(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).