MESON Chess Problem Database

Problem Display
PID: 99186 (8/1b1B1N2/6K1/RNpk4/n3r3/P6R/6Q1/b7 w - - 0 1)

Istokovics, Ferenc

Magyar Sakkelet, 1981

8/1b1B1N2/6K1/RNpk4/n3r3/P6R/6Q1/b7

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qa2#
  • Tries
    • 1.Sc7+?
      • 1...Kc4
        • 2.Rxa4#
      • 1...Kd4!
    • 1.Sfd6?
      • threat
        • 2.Qxe4#
      • 1...Ke5
        • 2.Qg5#
      • 1...Sc3
        • 2.Rh5#
      • 1...c4!
    • 1.Rxa4?
      • threat
        • 2.Sc7#
        • 2.Qxe4#
      • 1...Bd4
        • 2.Sc7#
      • 1...Be5
        • 2.Qxe4#
      • 1...c4!
  • Keys
    • 1.Sbd6!
      • threat
        • 2.Qxe4#
      • 1...Kd4
        • 2.Qd2#
      • 1...Sc3
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINR(c),S_FLIGHT::QAB(A)
  • Tries
    • Try
      • S(E);CHECK,P_PINP(d)
      • Vars
        • K(e);N_SPINP(d),N_SPINR(c),S_FLIGHT::R(D),XS(b)
      • Refutation
        • K(e);N_SPINP(d),N_SPINR(c),P-FLIGHT
    • Try
      • S(H);
      • Threat
        • QAB1(A),XR(c)
      • Vars
        • K(e);N_SPINR(c),P-FLIGHT::QAR2(A)
        • S(b);S_CUTB(a)::R(C)
      • Refutation
        • P(d);
    • Try
      • R(D);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::S(E)
        • B(a);::QAB1(A),XR(c)
      • Refutation
        • P(d);
  • Actual
    • S(E);P_PINP(d)
    • Threat
      • QAB1(A),XR(c)
    • Vars
      • K(e);N_SPINP(d),N_SPINR(c),P-FLIGHT::QAR2(A)
      • S(b);S_CUTB(a)::R(C)
HTML5 logo

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).