MESON Chess Problem Database

Problem Display
PID: 176069 (1Q6/2qRb3/2P5/1n1P1Pp1/1p1kB1R1/3NNP2/3K3p/8 w - - 0 1)

Schmidt, Joachim

Schach-Echo, 1940

1Q6/2qRb3/2P5/1n1P1Pp1/1p1kB1R1/3NNP2/3K3p/8

#2

11 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Qe5#
    • 1...Qe5
      • 2.Qxe5#
    • 1...Qb6
      • 2.Qe5#
    • 1...Qd8
      • 2.Qe5#
    • 1...Qxc6
      • 2.Qe5#
    • 1...Qa7
      • 2.Qe5#
    • 1...Qb7
      • 2.Qe5#
    • 1...Qxd7
      • 2.Qe5#
    • 1...Qc8
      • 2.Qe5#
  • Tries
    • 1.Qxb5?
      • threat
        • 2.Sc2#
        • 2.Qc4#
      • 1...Qf4
        • 2.Qc4#
      • 1...b3
        • 2.Qc4#
      • 1...Qxc6!
    • 1.Qb6+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Qxb6!
    • 1.Qh8+?
      • 1...Qe5
        • 2.Qxe5#
      • 1...Bf6!
  • Keys
    • 1.d6!
      • threat
        • 2.Bd5#
      • 1...Qxd6
        • 2.Qb6#
      • 1...Bxd6
        • 2.Qh8#
      • 1...Sxd6
        • 2.Qxb4#
      • 1...Sc3
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(f);OGATE::QAB1(K)
    • Q(f);OGATE::QAB1(K),XQ(f)
    • Q(f);OGATE,XP(I)::QAB1(K)
    • Q(f);OGATE,XR(J)::QAB1(K)
  • Tries
    • Try
      • Q(K);XS(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);P_PINS(C)::QAR1(K)
        • P(b);::QAR1(K)
      • Refutation
        • Q(f);XP(I)
    • Try
      • Q(K);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(K),XB(g)
      • Refutation
        • Q(f);XQ(K)
    • Try
      • Q(K);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAB1(K),XQ(f)
      • Refutation
        • B(g);P_SPINB(g)
  • Actual
    • P(G);
    • Threat
      • R(F)+B(E)
    • Vars
      • Q(f);N_GUARD,P_SPINQ(f),XP(G)::QAB(K)
      • B(g);N_GUARD,P_SPINB(g),XP(G)::QAB(K)
      • S(d);OGATE,P_SPINS(d),XP(G)::QAR2(K),XP(b)
      • S(d);OGATE::QAR2(K),XP(b)
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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).