MESON Chess Problem Database

Problem Display
PID: 197758 (2q2N2/2p2R2/p2kp1N1/8/1p6/n2K4/B3P3/3R2BQ w - - 0 1)

Gockel, Hubert

The Problemist, 1981

2q2N2/2p2R2/p2kp1N1/8/1p6/n2K4/B3P3/3R2BQ

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Rd7#
    • 1...Qd7
      • 2.Rxd7#
    • 1...Qa8
      • 2.Rd7#
    • 1...Qb8
      • 2.Rd7#
    • 1...Sc2
      • 2.Kxc2#
    • 1...Sc4
      • 2.Kxc4#
    • 1...b3
      • 2.Kc3#
    • 1...e5
      • 2.Qd5#
    • 1...c5
      • 2.Ke3#
    • 1...c6
      • 2.Ke4#
  • Tries
    • 1.Bh2+?
      • 1...e5
        • 2.Qd5#
      • 1...Kc5!
    • 1.Bxe6?
      • threat
        • 2.Qd5#
      • 1...Qb7
        • 2.Rd7#
      • 1...Qa8
        • 2.Rd7#
      • 1...c6
        • 2.Ke4#
        • 2.Qh2#
      • 1...Qxe6!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Qd5#
      • 1...c5
        • 2.Bh2#
      • 1...c6
        • 2.Qh2#
      • 1...Qb7
        • 2.Rxe6#
      • 1...Qa8
        • 2.Rxe6#
      • 1...Sc4
        • 2.Kxc4#
      • 1...b3
        • 2.Kc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD::R1(H)
    • Q(g);N_GUARD::R1(H),XQ(g)
    • S(a);::R(A)+K(F),XS(a)
    • P(b);::R(A)+K(F)
    • P(e);N_GUARD::QAR1(C)
    • P(f);SBLOCK::R(A)+K(F)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAR1(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(D);XP(e)
      • Threat
        • QAR1(C)
      • Vars
        • Q(g);N_GUARD::R1(H)
      • Refutation
        • Q(g);XB(D)
  • Actual
    • R(H);P_PINP(e)
    • Threat
      • QAR1(C)
    • Vars
      • P(f);SBLOCK::B(B)
      • P(f);SBLOCK::QAB(C)
      • Q(g);N_GUARD::R1(H),XP(e)
      • S(a);::R(A)+K(F),XS(a)
      • P(b);::R(A)+K(F)
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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).