MESON Chess Problem Database

Problem Display
PID: 176618 (6B1/7q/4R1p1/3N1p1P/prk2n1R/1Np5/P1p2BQK/2b5 w - - 0 1)

Touw Hian Bwee

Schach-Echo, 1968

6B1/7q/4R1p1/3N1p1P/prk2n1R/1Np5/P1p2BQK/2b5

#2

10 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rxf4+?
      • 1...Kd3
        • 2.Sxb4#
        • 2.Qf1#
      • 1...Kb5
        • 2.Sxc3#
        • 2.Rxb4#
        • 2.Rb6#
      • 1...Bxf4+!
    • 1.Rc6+?
      • 1...Kb5
        • 2.Sxc3#
      • 1...Kd3!
    • 1.Rd6?
      • threat
        • 2.Qf1#
      • 1...Kd3
        • 2.Sxf4#
      • 1...Kb5
        • 2.Sxc3#
      • 1...Qxh5
        • 2.Sc7#
      • 1...Qe7!
    • 1.Qe4+?
      • 1...Kb5
        • 2.Sxc3#
        • 2.Rb6#
        • 2.Qxb4#
      • 1...fxe4!
  • Keys
    • 1.Re5!
      • threat
        • 2.Qf1#
      • 1...Kd3
        • 2.Sxb4#
      • 1...Kb5
        • 2.Sc7#
      • 1...Qxh5
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK,P_SPINP(H),XS(g)
      • Refutation
        • B(a);CHECK,XR(F)
    • Try
      • R(I);CHECK
      • Vars
        • K(f);N_SPINS(g),S_FLIGHT::S(G),XP(c)
      • Refutation
        • K(f);N_SPINS(g),S_FLIGHT
    • Try
      • R(I);
      • Threat
        • QAB(C)
      • Vars
        • K(f);N_SPINS(g),S_FLIGHT::R(I)+S(G),DCHECK,XS(g)
        • K(f);N_SPINS(g),S_FLIGHT::S(G),XP(c)
        • Q(j);N_GUARD,P_PINR(F),XP(H)::B(J)+S(G)
      • Refutation
        • Q(j);
    • Try
      • Q(C);CHECK,N_PINS(g)
      • Refutation
        • P(h);XQ(C)
  • Actual
    • R(I);
    • Threat
      • QAB(C)
    • Vars
      • K(f);N_SPINS(g),S_FLIGHT::S(G),XR(e)
      • K(f);N_SPINS(g),S_FLIGHT::R(I)+S(G),DCHECK
      • Q(j);N_GUARD,P_PINR(F),XP(H)::B(J)+S(G),XS(g)
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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).