MESON Chess Problem Database

Problem Display
PID: 50317 (4N1K1/B1qP4/2p2Q2/3k2p1/1pR2b2/5n2/2Pp4/8 w - - 0 1)

Holler, Werner

Die Schwalbe, 2003

4N1K1/B1qP4/2p2Q2/3k2p1/1pR2b2/5n2/2Pp4/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxc6#
    • 1...Be5
      • 2.Qf7#
    • 1...Se1
      • 2.Rd4#
    • 1...Sg1
      • 2.Rd4#
    • 1...Sh2
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sh4
      • 2.Rd4#
    • 1...Se5
      • 2.Rd4#
  • Tries
    • 1.Sxc7+?
      • 1...Kxc4
        • 2.Qxc6#
      • 1...Bxc7!
    • 1.Qe7?
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qc5#
      • 1...Be5
        • 2.Qf7#
      • 1...Sd4
        • 2.Rxd4#
        • 2.Rc5#
      • 1...Se5
        • 2.Rd4#
      • 1...Qe5!
    • 1.Qf5+?
      • 1...Kxc4
        • 2.Qd3#
        • 2.Qc5#
      • 1...Be5
        • 2.Qf7#
      • 1...Se5
        • 2.Rd4#
      • 1...Qe5!
    • 1.Qxc6+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Qxc6!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qe4#
      • 1...Kxc4
        • 2.Qd3#
      • 1...Ke5
        • 2.Qe4#
      • 1...Qe5
        • 2.Qxc6#
      • 1...Be5
        • 2.Qf7#
      • 1...Sd4
        • 2.Rc5#
      • 1...Se5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(h);N_GUARD,SBLOCK::QAB1(C),XP(g)
    • B(d);SBLOCK::QAB(C)
    • S(b);N_GUARD::R1(B)
    • S(b);N_GUARD::R1(B),XS(b)
  • Tries
    • Try
      • S(F);CHECK,XQ(h)
      • Vars
        • K(e);S_FLIGHT,XR(B)::QAR2(C),XP(g)
      • Refutation
        • B(d);XS(F)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(e);S_FLIGHT,XR(B)::QAR1(C)
        • B(d);SBLOCK::QAB(C)
        • S(b);N_GUARD::R1(B)
      • Refutation
        • Q(h);
    • Try
      • Q(C);CHECK
      • Vars
        • B(d);P_SPINB(d),SBLOCK::QAB(C)
        • S(b);P_SPINS(b)::R1(B)
      • Refutation
        • Q(h);P_SPINQ(h)
    • Try
      • Q(C);CHECK,XP(g)
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(C)
      • Refutation
        • Q(h);XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • K(e);S_FLIGHT,XR(B)::QAB1(C)
      • K(e);P-FLIGHT::QAR1(C)
      • Q(h);N_GUARD,SBLOCK::QAB1(C),XP(g)
      • B(d);SBLOCK::QAB(C)
      • S(b);SBLOCK::R1(B)
      • S(b);N_GUARD,SBLOCK::R1(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).