MESON Chess Problem Database

Problem Display
PID: 187876 (3NR2B/1p2N3/1Q1b1Pp1/4k1n1/1p3p2/1K1P1p2/6pq/7b w - - 0 1)

Chocolous, Jiri

3rd HM., Deutsche Schachbund, 1910

3NR2B/1p2N3/1Q1b1Pp1/4k1n1/1p3p2/1K1P1p2/6pq/7b

#2

8 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qg1
      • 2.f7#
    • 1...Qg3
      • 2.f7#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bc7
      • 2.Qc5#
    • 1...Bxe7
      • 2.Qc5#
    • 1...Bb8
      • 2.Qc5#
    • 1...Sh3
      • 2.f7#
    • 1...Se4
      • 2.d4#
    • 1...Se6
      • 2.Sf7#
  • Tries
    • 1.Sec6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5!
    • 1.Qe3+?
      • 1...Se4
        • 2.Qxe4#
        • 2.d4#
      • 1...fxe3!
    • 1.Qa5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...b5
        • 2.Qa1#
      • 1...Kd4!
    • 1.Qb5+?
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kd4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qa1#
      • 1...Qxg1
        • 2.f7#
      • 1...Bxe7
        • 2.Qc5#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Bc7
        • 2.Qc5#
      • 1...Bb8
        • 2.Qc5#
      • 1...Se4
        • 2.d4#
      • 1...Se6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD::B(H)+P(D)
    • B(i);N_GUARD::QAR2(C),XB(i)
    • B(i);N_GUARD::QAR2(C)
    • B(i);N_GUARD,P_SPINB(i),XS(E)::QAR2(C)
    • S(h);S_CUTQ(c)::B(H)+P(D)
    • S(h);SBLOCK::P(B)
    • S(h);N_GUARD,SBLOCK::S(F)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(C)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • P(f);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR2(C),XB(i)
        • P(k);P_SPINP(k)::QAB(C)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::QAR2(C),XB(i)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB(C)
    • Vars
      • Q(c);N_GUARD,XQ(C)::B(H)+P(D)
      • B(i);N_GUARD,P_SPINB(i),XS(E)::QAR2(C)
      • B(i);N_GUARD::QAR2(C),XB(i)
      • B(i);N_GUARD::QAR2(C)
      • S(h);SBLOCK::P(B)
      • S(h);N_GUARD,SBLOCK::S(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).