MESON Chess Problem Database

Problem Display
PID: 99593 (5BQ1/R1p3nr/n1Rp2kp/7b/1qN1PK2/8/3p4/1B6 w - - 0 1)

Zilahi, Zoltan

Pest megyei Sakkszovetseg, 1966

5BQ1/R1p3nr/n1Rp2kp/7b/1qN1PK2/8/3p4/1B6

#2

8 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.e5#
    • 1...Qa5
      • 2.e5#
    • 1...Qc5
      • 2.e5#
    • 1...Rh8
      • 2.Qxg7#
  • Tries
    • 1.Rxd6+?
      • 1...cxd6
        • 2.Qf7#
      • 1...Qxd6+!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Qf7#
      • 1...Qxd6+
        • 2.e5#
      • 1...Qxe4+
        • 2.Sxe4#
      • 1...Kf6
        • 2.Se8#
      • 1...Qb3
        • 2.Sc4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Rh8
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(f);N_SPINS(i),P-FLIGHT::P(C)
    • Q(b);N_GUARD::B(A)+P(C)
    • R(j);N_GUARD::QAR1(H),XS(i)
  • Tries
    • Try
      • R(E);CHECK,XP(e)
      • Vars
        • P(h);XR(E)::QAB1(H)
      • Refutation
        • Q(b);CHECK,XR(E)
  • Actual
    • S(B);P_SPINP(C),XP(e)
    • Threat
      • QAB1(H)
    • Vars
      • Q(b);CHECK,N_PINP(C),P_SPINQ(b),XS(B)::B(A)+P(C)
      • Q(b);CHECK,P_SPINQ(b),XP(C)::R(E)+S(B),XQ(b)
      • K(f);N_SPINS(i),P-FLIGHT::R(E)+S(B),DCHECK
      • Q(b);N_GUARD,N_PINP(C)::R(E)+S(B)
      • Q(b);N_GUARD::R(E)+S(B),XQ(b)
      • R(j);N_GUARD::QAR1(H),XS(i)
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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).