MESON Chess Problem Database

Problem Display
PID: 18369 (1n2B3/3p1N2/1p3K2/q2Q3R/5bkp/2p5/4N1P1/6n1 w - - 0 1)

Goldschmeding, Cornelis

5th HM., Israel Ring Ty., 1955

1n2B3/3p1N2/1p3K2/q2Q3R/5bkp/2p5/4N1P1/6n1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Qf5#
    • 1...Qa1
      • 2.Qf5#
    • 1...Qa2
      • 2.Qf5#
    • 1...Qa3
      • 2.Qf5#
    • 1...Qa4
      • 2.Qf5#
    • 1...Qa6
      • 2.Qf5#
    • 1...Qa7
      • 2.Qf5#
    • 1...Qa8
      • 2.Qf5#
    • 1...Bc1
      • 2.Se5#
    • 1...Bd2
      • 2.Se5#
    • 1...Bh2
      • 2.Sh6#
      • 2.Rg5#
    • 1...Be3
      • 2.Se5#
    • 1...Bg3
      • 2.Sh6#
      • 2.Rg5#
    • 1...Be5+
      • 2.Sxe5#
    • 1...Bg5+
      • 2.Rxg5#
    • 1...Bd6
      • 2.Sh6#
      • 2.Rg5#
    • 1...Bh6
      • 2.Se5#
      • 2.Sxh6#
    • 1...Bc7
      • 2.Sh6#
      • 2.Rg5#
    • 1...Sxe2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
    • 1...Sa6
      • 2.Bxd7#
    • 1...Sc6
      • 2.Bxd7#
    • 1...b5
      • 2.Qf5#
  • Tries
    • 1.Qe6+?
      • 1...Kxh5
        • 2.Sxf4#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...dxe6!
    • 1.Qxd7+?
      • 1...Kxh5
        • 2.Sxf4#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Sxd7+!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Sh6#
      • 1...Qe5+
        • 2.Sxe5#
      • 1...Qf5+
        • 2.Qxf5#
      • 1...Qg5+
        • 2.Rxg5#
      • 1...Kxh5
        • 2.Qg6#
      • 1...Qxh5
        • 2.Qxf4#
      • 1...Sxe2
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 18
  • Sets
    • Q(f);N_GUARD::QAB1(C)
    • B(c);N_GUARD::S(F)
    • B(c);CHECK,N_GUARD::S(F),XB(c)
    • B(c);CHECK,N_GUARD::R1(D),XB(c)
    • S(a);N_GUARD,XS(A)::QAB1(C)
    • S(a);N_GUARD::QAB1(C),XS(a)
    • S(a);N_GUARD::QAB1(C)
    • S(i);N_GUARD::B(G),XP(h)
    • P(g);S_CUTQ(f)::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT,XR(D)::S(A),XB(c)
        • Q(f);CHECK,N_GUARD,P_SPINQ(f)::QAB1(C),XQ(f)
      • Refutation
        • P(h);XQ(C)
    • Try
      • Q(C);CHECK,XP(h)
      • Vars
        • K(d);S_FLIGHT,XR(D)::S(A),XB(c)
        • Q(f);CHECK,N_GUARD,P_SPINQ(f)::QAB1(C),XQ(f)
      • Refutation
        • S(i);CHECK,XQ(C)
  • Actual
    • Q(C);P_PINB(c)
    • Threat
      • S(F)
    • Vars
      • Q(f);CHECK,N_GUARD::S(F),XQ(f)
      • Q(f);CHECK,N_GUARD::QAB1(C),XQ(f)
      • Q(f);CHECK,N_GUARD::R1(D),XQ(f)
      • K(d);N_SPINB(c),S_FLIGHT,XR(D)::QAB1(C)
      • Q(f);SBLOCK,XR(D)::QAR1(C),XB(c)
      • S(a);N_GUARD,XS(A)::QAB1(C)
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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).