MESON Chess Problem Database

Problem Display
PID: 56878 (5R2/4p1n1/3N1N2/Rp2kr1p/1Q2p1PK/2r5/8/B7 w - - 0 1)

Touw Hian Bwee

2nd Prize, Behting (K) MT, 1967

5R2/4p1n1/3N1N2/Rp2kr1p/1Q2p1PK/2r5/8/B7

#2

8 + 8

3772 FIDE Album (1965-1967) 1976
6352 A Collection of Chess Problems by Touw Hian Bwee 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qxe4#
    • 1...exd6
      • 2.Qxe4#
  • Tries
    • 1.Sxb5?
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Ke6
        • 2.Sd4#
      • 1...exf6
        • 2.Qd6#
      • 1...Rf4
        • 2.Sc7#
      • 1...e3
        • 2.Sc7#
        • 2.Qe4#
      • 1...Rxf6!
    • 1.Sxf5?
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Ke6
        • 2.Qxe7#
        • 2.Qxe4#
      • 1...exf6
        • 2.Qd6#
      • 1...e3
        • 2.Qe4#
      • 1...Sxf5+!
    • 1.Bxc3+?
      • 1...Kf4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Rxb5+?
      • 1...Kf4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qxc3+?
      • 1...Kf4
        • 2.Sd5#
        • 2.Qg3#
      • 1...Kxd6
        • 2.Ra6#
      • 1...Ke6!
  • Keys
    • 1.Ra6!
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Ke6
        • 2.Sc4#
      • 1...Rf4
        • 2.Sf7#
      • 1...e3
        • 2.Sf7#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINP(c),N_SPINR(a),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
    • P(g);SBLOCK,XS(F)::QAR1(B),XP(b)
  • Tries
    • Try
      • S(F);XP(c)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(d);N_SPINR(a),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
        • K(d);N_SPINR(a),P-FLIGHT::S(F)
        • P(g);N_GUARD,XS(G)::QAB1(B)
        • R(e);P_PINP(C),SBLOCK::R(E)+S(F)
      • Refutation
        • R(e);XS(G)
    • Try
      • S(F);XR(e)
      • Threat
        • QAR1(B),XP(b)
      • Vars
        • K(d);N_SPINP(c),N_SPINR(a),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
        • P(g);N_GUARD,XS(G)::QAB1(B)
        • P(b);::QAR1(B)
      • Refutation
        • S(h);CHECK,XS(F)
    • Try
      • B(A);CHECK,XR(a)
      • Vars
        • K(d);N_SPINP(c),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(d);N_SPINP(c),P-FLIGHT
    • Try
      • R(E);CHECK,XP(c)
      • Vars
        • K(d);N_SPINR(a),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(d);N_SPINR(a),P-FLIGHT
    • Try
      • Q(B);CHECK,XR(a)
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT,XS(F)::R(E)
      • Refutation
        • K(d);N_SPINP(c),P-FLIGHT
  • Actual
    • R(E);N_PINP(c)
    • Threat
      • QAR1(B),XP(b)
    • Vars
      • K(d);N_SPINR(a),P_SPINP(b),S_FLIGHT::QAR1(B),XP(b)
      • K(d);N_SPINR(a),P-FLIGHT::R(E)+S(F)
      • R(e);P_PINP(C),SBLOCK::S(F)
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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).