MESON Chess Problem Database

Problem Display
PID: 203286 (1n4kr/b3K2p/2pP1P2/1p6/3NB3/7p/3r4/Q7 w - - 0 1)

Kaiser, Gerhard

Leipziger Tageblatt, 1924

1n4kr/b3K2p/2pP1P2/1p6/3NB3/7p/3r4/Q7

#2

6 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qa2#
    • 1...Ra2
      • 2.Qxa2#
    • 1...Rxd4
      • 2.Qg1#
    • 1...c5
      • 2.Bd5#
  • Tries
    • 1.Sxc6?
      • threat
        • 2.f7#
      • 1...Rb2
        • 2.Bd5#
      • 1...Rf2
        • 2.Bd5#
      • 1...Rd4
        • 2.Qg1#
      • 1...Bd4
        • 2.Bd5#
      • 1...Sxc6+!
    • 1.Qc3?
      • threat
        • 2.Qb3#
        • 2.Qg3#
      • 1...Rxd4
        • 2.Qg3#
      • 1...Rb2
        • 2.Qg3#
      • 1...Rc2
        • 2.Qg3#
      • 1...Rg2
        • 2.Qb3#
      • 1...c5
        • 2.Bd5#
        • 2.Qg3#
      • 1...Rd3!
    • 1.Qd1?
      • threat
        • 2.Qb3#
        • 2.Qg4#
      • 1...Rxd4
        • 2.Qg4#
        • 2.Qg1#
      • 1...Rb2
        • 2.Qg4#
      • 1...Rc2
        • 2.Qg4#
      • 1...Re2
        • 2.Qb3#
      • 1...Rg2
        • 2.Qb3#
      • 1...Rd3
        • 2.Qg4#
      • 1...c5
        • 2.Bd5#
        • 2.Qg4#
      • 1...h5
        • 2.Qb3#
      • 1...Rxd1!
    • 1.Qa3?
      • threat
        • 2.Qb3#
        • 2.Qg3#
      • 1...Rxd4
        • 2.Qg3#
      • 1...Rb2
        • 2.Qg3#
      • 1...Rc2
        • 2.Qg3#
      • 1...Rg2
        • 2.Qb3#
      • 1...c5
        • 2.Bd5#
        • 2.Qg3#
      • 1...Rd3!
  • Keys
    • 1.Sc2!
      • threat
        • 2.f7#
      • 1...Rf2
        • 2.Qa2#
      • 1...Rd4
        • 2.Qg1#
      • 1...Bd4
        • 2.Qa2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(a);N_GUARD::QAB(A)
    • R(a);N_GUARD::QAB(A),XR(a)
    • R(a);N_GUARD,XS(B)::QAB(A)
    • P(d);N_GUARD::B(C)
  • Tries
    • Try
      • S(B);XP(d)
      • Threat
        • P(E)
      • Vars
        • R(a);N_GUARD::B(C)
        • R(a);N_GUARD,S_CUTB(e)::QAB(A)
        • B(e);S_CUTR(a)::B(C)
      • Refutation
        • S(g);CHECK,XS(B)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(B)::QAR(A)
        • R(a);::QAR(A)
        • R(a);::QAB(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR(A)
        • R(a);P_PINB(C)::QAB(A)
        • R(a);::QAB(A)
        • P(f);::QAB(A)
      • Refutation
        • R(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);XS(B)::QAR(A)
        • R(a);::QAR(A)
        • R(a);::QAB(A)
      • Refutation
        • R(a);
  • Actual
    • S(B);
    • Threat
      • P(E)
    • Vars
      • R(a);N_GUARD::QAB(A)
      • R(a);N_GUARD,S_CUTB(e)::QAB(A)
      • B(e);S_CUTR(a)::QAB(A)
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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).