MESON Chess Problem Database

Problem Display
PID: 173627 (1rn5/N1b2p1p/1ppk2bR/1r4q1/1P2Qp1B/2PN3B/1P6/1K1R4 w - - 0 1)

Boros, Sandor

Skakbladet, 1933

1rn5/N1b2p1p/1ppk2bR/1r4q1/1P2Qp1B/2PN3B/1P6/1K1R4

#2

11 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxh4
      • 2.Sc5#
    • 1...Qxh6
      • 2.Sc5#
      • 2.Qxc6#
    • 1...Qe7
      • 2.Sc5#
      • 2.Qxc6#
    • 1...Qd8
      • 2.Sc5#
      • 2.Qxc6#
    • 1...Qg1
      • 2.Qxc6#
    • 1...Qg3
      • 2.Qxc6#
    • 1...Qg4
      • 2.Qxc6#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qe5
      • 2.Qxc6#
    • 1...Qf5
      • 2.Qxc6#
    • 1...Qh5
      • 2.Qxc6#
    • 1...Rb7
      • 2.Sxc8#
    • 1...c5
      • 2.Sxb5#
    • 1...f5
      • 2.Sc5#
    • 1...f6
      • 2.Qe6#
  • Tries
    • 1.Se5+?
      • 1...Rd5
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Ke7!
    • 1.Rxg6+?
      • 1...Qf6
        • 2.Sc5#
        • 2.Rxf6#
      • 1...Qxg6
        • 2.Sc5#
        • 2.Qxc6#
      • 1...fxg6
        • 2.Qe6#
      • 1...f6
        • 2.Qe6#
      • 1...hxg6!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qd7#
      • 1...Kd5
        • 2.Qxc6#
      • 1...Qe7
        • 2.Qxc6#
      • 1...Qd8
        • 2.Qxc6#
      • 1...Qg4
        • 2.Qxc6#
      • 1...Qf5
        • 2.Qxc6#
      • 1...Rf5
        • 2.Se5#
      • 1...f5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD,XB(I)::R(B)+S(E)
    • Q(c);P_PINR(B)::QAR1(H),XP(e)
    • Q(c);::QAR1(H),XP(e)
    • Q(c);N_GUARD::R(B)+S(E),XQ(c)
    • R(k);N_GUARD::S(K),XS(l)
    • P(e);N_GUARD,S_CUTQ(c)::S(K),XR(b)
    • P(i);S_CUTQ(c)::R(B)+S(E)
    • P(i);N_GUARD,N_SPINB(g)::QAR1(H)
  • Tries
    • Try
      • S(E);CHECK,P_SPINQ(H)
      • Refutation
        • K(f);N_SPINB(g),P_SPINQ(c),S_FLIGHT
    • Try
      • R(J);CHECK,XB(g)
      • Vars
        • P(i);N_GUARD,XR(J)::QAR1(H)
        • P(i);N_GUARD,P_SPINP(i)::QAR1(H)
      • Refutation
        • P(j);XR(J)
  • Actual
    • Q(H);P_SPINS(E)
    • Threat
      • QAR1(H)
    • Vars
      • K(f);N_SPINB(g),P-FLIGHT::QAB1(H),XP(e)
      • Q(c);::QAR1(H),XP(e)
      • R(b);N_PINS(E)::R(B)+S(E)
      • P(i);N_PINS(E)::R(B)+S(E)
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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).