MESON Chess Problem Database

Problem Display
PID: 234943 (2br4/q3p3/3pn3/bP3Np1/P1k1P1K1/n2N4/1Q1RPB2/5B2 w - - 0 1)

Hoffmann, Fritz

Hlas l'udu, 1986

2br4/q3p3/3pn3/bP3Np1/P1k1P1K1/n2N4/1Q1RPB2/5B2

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Sxe3#
    • 1...Qb8
      • 2.Se3#
    • 1...Qa6
      • 2.Se3#
    • 1...Qb7
      • 2.Se3#
    • 1...Qc7
      • 2.Se3#
    • 1...Qd7
      • 2.Se3#
    • 1...Qa8
      • 2.Se3#
    • 1...Bc3
      • 2.Qa2#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Bb6
      • 2.Qb4#
    • 1...Bc7
      • 2.Qb4#
    • 1...d5
      • 2.Se5#
  • Tries
    • 1.Sxd6+?
      • 1...Rxd6
        • 2.Se5#
      • 1...exd6!
    • 1.Rc2+?
      • 1...Bc3
        • 2.Rxc3#
        • 2.Qxc3#
        • 2.Qa2#
        • 2.Qb4#
      • 1...Sxc2!
    • 1.Qxa3?
      • threat
        • 2.Sb2#
      • 1...Bc3
        • 2.Qa2#
      • 1...Qd4!
    • 1.Qc2+?
      • 1...Bc3
        • 2.Qa2#
      • 1...Sxc2!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qb3#
      • 1...Qxc5
        • 2.e3#
      • 1...Sxc5
        • 2.Rd4#
      • 1...dxc5
        • 2.Se3#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • Q(g);N_GUARD::S(K),XQ(g)
    • Q(g);N_GUARD::S(K)
    • B(c);SBLOCK::QAB(B)
    • B(c);N_GUARD::QAR1(B),XB(c)
    • B(c);N_GUARD::QAR1(B)
    • P(e);N_GUARD::S(F)
  • Tries
    • Try
      • S(K);CHECK,XP(e)
      • Vars
        • R(j);XS(K)::S(F)
      • Refutation
        • P(h);XS(K)
    • Try
      • R(C);CHECK
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(B);XS(a)
      • Threat
        • S(F)
      • Vars
        • B(c);SBLOCK::QAB(B)
      • Refutation
        • Q(g);P_PINP(H)
    • Try
      • Q(B);CHECK
      • Vars
        • B(c);P_SPINB(c),SBLOCK::QAB(B)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(F);
    • Threat
      • QAB1(B)
    • Vars
      • Q(g);SBLOCK,XS(F)::B(A)+P(D)
      • S(f);N_GUARD,P_PINS(K),SBLOCK,XS(F)::R1(C)
      • P(e);SBLOCK,XS(F)::S(K)
      • S(f);N_GUARD,P_PINS(K)::QAR1(B),XS(f)
HTML5 logo

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).