MESON Chess Problem Database

Problem Display
PID: 176431 (1B2R1B1/1Q3p1n/R3p2p/2p2k1r/2K1NN1P/5p1P/8/2b3r1 w - - 0 1)

Gab, Wolfgang

Schach-Echo, 1982

1B2R1B1/1Q3p1n/R3p2p/2p2k1r/2K1NN1P/5p1P/8/2b3r1

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Bxh7#
    • 1...Re1
      • 2.Bxh7#
    • 1...Rf1
      • 2.Bxh7#
    • 1...Rh1
      • 2.Bxh7#
    • 1...f6
      • 2.Bxe6#
  • Tries
    • 1.Sg3+?
      • 1...Kf6
        • 2.Qxf7#
      • 1...Rxg3!
    • 1.Qd5+?
      • 1...e5
        • 2.Qxe5#
      • 1...exd5+!
    • 1.Qxf7+?
      • 1...Sf6
        • 2.Qxe6#
      • 1...Kxe4!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Se7#
      • 1...exd5+
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qb1#
      • 1...Kg6
        • 2.Qxf7#
      • 1...Bg5
        • 2.Bxh7#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::B(J),XS(j)
    • P(i);OGATE::B(J),XP(g)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINP(g)::QAR1(G),XP(i)
      • Refutation
        • R(b);XS(C)
    • Try
      • Q(G);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAR1(G),XP(g)
      • Refutation
        • P(g);CHECK,XQ(G)
    • Try
      • Q(G);CHECK,XP(i)
      • Vars
        • S(j);P_SPINS(j)::QAB1(G),XP(g)
      • Refutation
        • K(e);P_SPINP(g),S_FLIGHT,XS(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • P(g);CHECK,OGATE,XS(D)::QAR2(G),XP(g)
      • K(e);OGATEB,P_SPINP(g),S_FLIGHT,XS(C)::QAB(G)
      • K(e);P_SPINP(g),S_FLIGHT::QAB1(G),XP(i)
      • B(a);S_CUTR(b)::B(J),XS(j)
      • P(g);OGATE::R1(I),XP(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).