MESON Chess Problem Database

Problem Display
PID: 262834 (n7/1N2n2K/2p1p1p1/Q2bk3/2r2R2/q5B1/6p1/1B6 w - - 0 1)

Zalewski, Mieczyzlaw

Szachy, 1976

n7/1N2n2K/2p1p1p1/Q2bk3/2r2R2/q5B1/6p1/1B6

#2

6 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rf5#
  • Tries
    • 1.Qc7+?
      • 1...Qd6
        • 2.Qxd6#
      • 1...Sxc7!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qh8#
      • 1...Qxg3
        • 2.Qd6#
      • 1...Bf3
        • 2.Rf5#
      • 1...Be4
        • 2.Rf3#
      • 1...Sf5
        • 2.Re4#
      • 1...Sg8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(c);SBLOCK::B(B)+R(C),DCHECK
  • Tries
    • Try
      • Q(D);CHECK,N_PINB(d)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAB1(D),XQ(b)
      • Refutation
        • S(j);XQ(D)
  • Actual
    • Q(D);N_PINB(d)
    • Threat
      • QAB(D)
    • Vars
      • Q(b);N_GUARD,XB(B)::QAB1(D)
      • B(d);::B(B)+R(C),DCHECK
      • B(d);S_CUTR(c)::B(B)+R(C)
      • S(i);SBLOCK::B(B)+R(C),DCHECK
      • S(i);OGATE::QAR2(D)
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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).