MESON Chess Problem Database

Problem Display
PID: 225514 (Q7/K1p4B/1pR2p1B/3kp2N/2pP1r2/2pr1P2/N1nP4/6q1 w - - 0 1)

Hernitz, Zvonimir

Praca, 1956

Q7/K1p4B/1pR2p1B/3kp2N/2pP1r2/2pr1P2/N1nP4/6q1

#2

10 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qd8#
    • 1...Qxd4
      • 2.Bg8#
    • 1...Rdxd4
      • 2.Sxc3#
    • 1...Rfxd4
      • 2.Sxf6#
    • 1...Sxd4
      • 2.Sb4#
  • Tries
    • 1.Sxc3+?
      • 1...Kxd4
        • 2.Qd8#
      • 1...Rxc3!
    • 1.Sb4+?
      • 1...Kxd4
        • 2.Qd8#
      • 1...Sxb4!
    • 1.Sxf4+?
      • 1...Kxd4
        • 2.Qd8#
      • 1...exf4!
    • 1.Sxf6+?
      • 1...Kxd4
        • 2.Qd8#
      • 1...Rxf6!
    • 1.Bf8?
      • threat
        • 2.Rd6#
      • 1...Kxd4
        • 2.Qd8#
      • 1...Qxd4
        • 2.Bg8#
      • 1...Rdxd4
        • 2.Sxc3#
      • 1...Rfxd4
        • 2.Sxf6#
      • 1...Sxd4
        • 2.Sb4#
      • 1...exd4!
    • 1.Be4+?
      • 1...Kxd4
        • 2.Qd8#
      • 1...Rxe4!
    • 1.Bg8+?
      • 1...Kxd4
        • 2.Rxc4#
        • 2.Qd8#
      • 1...Qxg8!
    • 1.Rxf6+?
      • 1...c6
        • 2.Qd8#
      • 1...Kxd4!
  • Keys
    • 1.Rxc7+!
      • 1...Kxd4
        • 2.Qd8#
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • K(g);P-FLIGHT,XP(D)::QAR(J)
    • Q(a);N_GUARD,SBLOCK,XP(D)::B(I)
    • R(d);N_GUARD,SBLOCK,XP(D)::S(A),XP(c)
    • R(f);N_GUARD,SBLOCK,XP(D)::S(E),XP(j)
    • S(b);N_GUARD,SBLOCK,XP(D)::S(A)
  • Tries
    • Try
      • S(A);CHECK,XP(c)
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • R(d);XS(A)
    • Try
      • S(A);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • S(b);XS(A)
    • Try
      • S(E);CHECK,XR(f)
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • P(h);XS(E)
    • Try
      • S(E);CHECK,XP(j)
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • R(f);XS(E)
    • Try
      • B(G);
      • Threat
        • QAB(J)+R(F),DCHECK
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
        • Q(a);N_GUARD,SBLOCK,XP(D)::B(I)
        • R(d);N_GUARD,SBLOCK,XP(D)::S(A),XP(c)
        • R(f);N_GUARD,SBLOCK,XP(D)::S(E),XP(j)
        • S(b);N_GUARD,SBLOCK,XP(D)::S(A)
      • Refutation
        • P(h);XP(D)
    • Try
      • B(I);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(D)::QAR(J)
      • Refutation
        • R(f);XB(I)
    • Try
      • B(I);CHECK
      • Refutation
        • Q(a);XB(I)
    • Try
      • R(F);CHECK,XP(j)
      • Vars
        • P(k);P_SPINP(k)::QAR(J)
      • Refutation
        • K(g);P-FLIGHT,XP(D)
  • Actual
    • R(F);CHECK,XP(k)
    • Vars
      • K(g);P-FLIGHT,XP(D)::QAR(J)
      • K(g);P-FLIGHT::QAR1(J)
      • K(g);S_FLIGHT::QAR2(J)
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).