MESON Chess Problem Database

Problem Display
PID: 153528 (3n1N2/3bp3/1P1k4/2pP1Q2/q1PPR1K1/6N1/4r3/2B5 w - - 0 1)

Rothstein, Louis

Good Companions (February), 1916

3n1N2/3bp3/1P1k4/2pP1Q2/q1PPR1K1/6N1/4r3/2B5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Qxd7#
    • 1...Qc2
      • 2.Qxd7#
    • 1...Qb3
      • 2.Qxd7#
    • 1...Qa1
      • 2.Qxd7#
    • 1...Qa2
      • 2.Qxd7#
    • 1...Qa3
      • 2.Qxd7#
    • 1...Qb4
      • 2.Qxd7#
    • 1...Qxc4
      • 2.Qxd7#
    • 1...Qa5
      • 2.Qxd7#
    • 1...Qa6
      • 2.Qxd7#
    • 1...Qa8
      • 2.Qxd7#
    • 1...Rxe4+
      • 2.Sxe4#
    • 1...Bb5
      • 2.Qe5#
    • 1...Bxf5+
      • 2.Sxf5#
    • 1...Bc6
      • 2.Qe5#
    • 1...Be6
      • 2.Bf4#
    • 1...Be8
      • 2.Qe5#
    • 1...Sc6
      • 2.Qxd7#
    • 1...Se6
      • 2.Qe5#
  • Tries
    • 1.Qe6+?
      • 1...Sxe6
        • 2.Sf5#
      • 1...Bxe6+!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Bxe7#
      • 1...Rxe4+
        • 2.Sxe4#
      • 1...Bxf5+
        • 2.Sxf5#
      • 1...Be6
        • 2.Bf4#
      • 1...Sc6
        • 2.Qxd7#
      • 1...Se6
        • 2.Qe5#
      • 1...e5
        • 2.dxe5#
      • 1...e6
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 14
  • Sets
    • Q(b);N_GUARD::QAR1(H),XB(e)
    • Q(b);N_GUARD,XP(C)::QAR1(H),XB(e)
    • R(a);CHECK,XR(E)::S(B),XR(a)
    • B(e);N_PINQ(H)::QAB1(H)
    • B(e);CHECK,XQ(H)::S(B),XB(e)
    • B(e);S_CUTP(f)::B(A)
    • S(g);S_CUTQ(b)::QAR1(H),XB(e)
    • S(g);N_PINQ(H)::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(g);XQ(H)::S(B)
      • Refutation
        • B(e);CHECK,XQ(H)
  • Actual
    • B(A);
    • Threat
      • B(A),XP(f)
    • Vars
      • R(a);CHECK,XR(E)::S(B),XR(a)
      • B(e);CHECK,XQ(H)::S(B),XB(e)
      • B(e);S_CUTP(f)::B(A)
      • S(g);S_CUTQ(b)::QAR1(H),XB(e)
      • S(g);N_PINQ(H)::QAB1(H)
      • P(f);OGATE::P(D),XP(f)
      • P(f);N_PINQ(H)::QAB1(H)
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).