MESON Chess Problem Database

Problem Display
PID: 137131 (n3K3/1Qp1n1B1/8/1R6/qPkN1N2/p3p3/1PP5/8 w - - 0 1)

Kovacevic, Marjan

Source?, 0000

n3K3/1Qp1n1B1/8/1R6/qPkN1N2/p3p3/1PP5/8

#2

9 + 7

6490 yacpdb 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc2
      • 2.Rc5#
    • 1...Qb3
      • 2.Rc5#
      • 2.cxb3#
    • 1...Qxb5+
      • 2.Qxb5#
    • 1...Qa6
      • 2.Rc5#
    • 1...Sd5
      • 2.Qxd5#
      • 2.Qc6#
    • 1...Sf5
      • 2.Qd5#
      • 2.Qc6#
    • 1...Sc6
      • 2.Rc5#
      • 2.Qxc6#
    • 1...Sg6
      • 2.Qd5#
      • 2.Qc6#
    • 1...Sc8
      • 2.Qd5#
      • 2.Qc6#
    • 1...Sg8
      • 2.Qd5#
      • 2.Qc6#
    • 1...c6
      • 2.Rc5#
  • Tries
    • 1.Kxe7?
      • threat
        • 2.Rc5#
        • 2.Qd5#
        • 2.Qc6#
      • 1...Qxb5
        • 2.Qxb5#
      • 1...axb2
        • 2.Rc5#
        • 2.Qc6#
      • 1...Qa5
        • 2.Qd5#
        • 2.Qc6#
      • 1...Qa6
        • 2.Rc5#
        • 2.Qd5#
      • 1...Qa7
        • 2.Qd5#
      • 1...Sb6
        • 2.Qc6#
        • 2.Qxc7#
      • 1...c5
        • 2.Rxc5#
        • 2.Qd5#
      • 1...c6
        • 2.Rc5#
        • 2.Qxc6#
      • 1...Qxb4+!
    • 1.Sc6?
      • threat
        • 2.Rc5#
      • 1...Qxc2
        • 2.Sa5#
      • 1...Qxb5
        • 2.b3#
      • 1...Qa5
        • 2.Sxa5#
        • 2.b3#
      • 1...Qa7
        • 2.b3#
      • 1...Qxb4!
    • 1.Qxc7+?
      • 1...Sc6
        • 2.Qxc6#
        • 2.Qf7#
      • 1...Sxc7+!
    • 1.b3+?
      • 1...Qxb3
        • 2.Rc5#
      • 1...Kc3!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qd3#
      • 1...Qxb5+
        • 2.Sc6#
      • 1...Qxc2
        • 2.Qxc2#
      • 1...Qb3
        • 2.cxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_PINR(F),XP(B)::R1(F)
    • Q(c);CHECK,OGATE,XR(F)::QAB1(G),XQ(c)
    • Q(c);N_PINR(F)::R1(F)
    • P(e);N_PINR(F)::R1(F)
  • Tries
    • Try
      • K(I);N_SPINR(F),P-FLIGHT,XS(f)
      • Threat
        • DUALS(3)
      • Vars
        • Q(c);OGATE,XR(F)::QAB1(G),XQ(c)
        • Q(c);::QAB1(G)
      • Refutation
        • Q(c);CHECK,XP(C)
    • Try
      • S(D);N_SPINR(F)
      • Threat
        • R1(F)
      • Vars
        • Q(c);N_GUARD,XP(B)::S(D)
        • Q(c);N_GUARD,P_PINS(D),XR(F)::P(A)
        • Q(c);N_GUARD::P(A)
      • Refutation
        • Q(c);XP(C)
    • Try
      • Q(G);CHECK,XP(e)
      • Refutation
        • S(g);CHECK,XQ(G)
    • Try
      • P(A);CHECK
      • Vars
        • Q(c);N_PINR(F),XP(A)::R1(F)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • Q(c);CHECK,SBLOCK,XR(F)::QAR(G)+S(D)
      • Q(c);N_PINR(F),OGATE,XP(B)::QAR2(G),XQ(c)
      • Q(c);N_PINR(F),OGATE::P(B),XQ(c)
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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).