MESON Chess Problem Database

Problem Display
PID: 233478 (1K1Q4/6p1/NN2b3/1n2kpP1/n1PRp3/1r3RPB/1b1r1q2/2B5 w - - 0 1)

Schreckenbach, Michael

Freie Presse, 1982

1K1Q4/6p1/NN2b3/1n2kpP1/n1PRp3/1r3RPB/1b1r1q2/2B5

#2

11 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Bf4#
    • 1...Rc2
      • 2.Bf4#
    • 1...Re2
      • 2.Bf4#
    • 1...Rdd3
      • 2.Bf4#
    • 1...Rxd4
      • 2.Bf4#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Bc8
      • 2.Qd5#
    • 1...Sa3
      • 2.Qd6#
    • 1...Sc3
      • 2.Qd6#
    • 1...Sxd4
      • 2.Qc7#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
    • 1...Sc7
      • 2.Qd6#
    • 1...f4
      • 2.gxf4#
    • 1...g6
      • 2.Qf6#
      • 2.Qh8#
  • Tries
    • 1.Rxf5+?
      • 1...Bxf5
        • 2.Qd5#
      • 1...Qxf5!
    • 1.Qc7+?
      • 1...Kxd4
        • 2.Qxg7#
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qxg7#
      • 1...Sxc7!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxg7#
      • 1...Kxd4
        • 2.Qxg7#
      • 1...Qxd4
        • 2.Rxf5#
      • 1...Rxd4
        • 2.Bf4#
      • 1...Bxd4
        • 2.Sd7#
      • 1...Sxd4
        • 2.Qc7#
      • 1...g6
        • 2.Qf6#
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 12
  • Sets
    • R(b);OGATE::B(A)
    • R(b);OGATE,XR(F)::B(A)
    • B(j);N_GUARD::QAR1(K),XB(j)
    • B(j);N_GUARD::QAR1(K)
    • S(g);N_GUARD,P_PINS(I)::QAB1(K)
    • S(g);N_GUARD,P_PINS(I),SBLOCK,XR(F)::QAB(K)
    • S(g);N_GUARD,P_PINS(I)::QAB1(K),XS(g)
    • P(i);OGATE::P(C),XP(i)
  • Tries
    • Try
      • R(B);CHECK,XP(i)
      • Vars
        • B(j);XR(B)::QAR1(K)
      • Refutation
        • Q(c);XR(B)
    • Try
      • Q(K);CHECK
      • Vars
        • K(h);S_FLIGHT,XR(F)::QAB(K),XP(k)
      • Refutation
        • S(g);P_PINS(I),XQ(K)
  • Actual
    • Q(K);P_PINB(j)
    • Threat
      • QAB(K),XP(k)
    • Vars
      • K(h);N_SPINB(j),S_FLIGHT,XR(F)::QAB(K),XP(k)
      • Q(c);N_GUARD,SBLOCK,XR(F)::R1(B),XP(i)
      • R(b);OGATE,SBLOCK,XR(F)::B(A)
      • B(a);SBLOCK,XR(F)::S(I)
      • S(g);N_GUARD,P_PINS(I),SBLOCK,XR(F)::QAB(K)
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).