MESON Chess Problem Database

Problem Display
PID: 22030 (2B4R/1Q5K/8/5N2/3p1p1p/1R1q2nk/3p1Prb/4Nn2 w - - 0 1)

ten Cate, Pieter

3rd HM., Good Companions (October), 1923

2B4R/1Q5K/8/5N2/3p1p1p/1R1q2nk/3p1Prb/4Nn2

#2

8 + 10

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf5+
      • 2.Bxf5#
    • 1...Qa6
      • 2.Sd6#
    • 1...Sh1
      • 2.Qxg2#
    • 1...Se2
      • 2.Qxg2#
    • 1...Se4
      • 2.Sg3#
    • 1...Sxf5
      • 2.Qxg2#
    • 1...Sh5
      • 2.Qxg2#
  • Tries
    • 1.Qe7?
      • threat
        • 2.Qxh4#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Kg4
        • 2.Qxh4#
      • 1...Sxf5!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Rxh4#
      • 1...Qxf5+
        • 2.Bxf5#
      • 1...Qa6+
        • 2.Sd6#
      • 1...Sh1+
        • 2.Qxg2#
      • 1...Se2+
        • 2.Qxg2#
      • 1...Se4+
        • 2.Sg3#
      • 1...Sxf5+
        • 2.Qxg2#
      • 1...Sh5+
        • 2.Qxg2#
      • 1...Kg4
        • 2.Rxh4#

This anticipates 168167(1931)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,OGATE,P_SPINQ(e),P_SPINS(f),XS(D)::B(G),XQ(e)
    • Q(e);N_PINS(D),P_SPINS(f)::B(G)+S(D)
    • S(f);P_SPINQ(e)::QAB1(E),XR(c)
    • S(f);N_PINS(D),P_SPINQ(e)::B(G)+S(D)
    • S(f);P_SPINQ(e),P_SPINS(f),XS(D)::QAB1(E),XR(c)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR1(E),XP(j)
      • Vars
        • Q(e);CHECK,OGATE,P_SPINQ(e),P_SPINS(f),XS(D)::B(G),XQ(e)
        • K(g);S_FLIGHT::QAR1(E),XP(j)
      • Refutation
        • S(f);P_SPINQ(e),P_SPINS(f),XS(D)
  • Actual
    • K(F);P_PINP(j),S_FLIGHT
    • Threat
      • R1(H),XP(j)
    • Vars
      • Q(e);CHECK,OGATE,P_SPINQ(e),P_SPINS(f),XS(D)::B(G),XQ(e)
      • Q(e);CHECK,N_PINS(D),P_SPINS(f)::B(G)+S(D)
      • S(f);CHECK,P_SPINQ(e)::QAB1(E),XR(c)
      • S(f);CHECK,N_PINS(D),P_SPINQ(e)::B(G)+S(D)
      • S(f);CHECK,P_SPINQ(e),P_SPINS(f),XS(D)::QAB1(E),XR(c)
      • S(f);CHECK,N_SPINP(j),P_SPINQ(e)::QAB1(E),XR(c)
      • K(g);N_SPINP(j),S_FLIGHT::R1(H),XP(j)
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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).